diff --git a/public/popper.min.js b/public/popper.min.js
index bfbe369..8a17212 100644
--- a/public/popper.min.js
+++ b/public/popper.min.js
@@ -1,6 +1,5 @@
-/**
- * @popperjs/core v2.1.1 - MIT License
- */
-
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t=r(e);for(e=m(e);e&&0<=["table","td","th"].indexOf(a(e));)e=m(e);return e&&"body"===a(e)&&"static"===d(e).position?t:e||t}function v(e){var t=new Map,r=new Set,n=[];return e.forEach((function(e){t.set(e.name,e)})),e.forEach((function(e){r.has(e.name)||function e(o){r.add(o.name),[].concat(o.requires||[],o.requiresIfExists||[]).forEach((function(n){r.has(n)||(n=t.get(n))&&e(n)})),n.push(o)}(e)})),n}function g(e){var t;return function(){return t||(t=new Promise((function(r){Promise.resolve().then((function(){t=void 0,r(e())}))}))),t}}function b(e){return e.split("-")[0]}function y(){for(var e=arguments.length,t=Array(e),r=0;r<e;r++)t[r]=arguments[r];return!t.some((function(e){return!(e&&"function"==typeof e.getBoundingClientRect)}))}function w(e){void 0===e&&(e={});var t=e.defaultModifiers,r=void 0===t?[]:t,n=void 0===(e=e.defaultOptions)?F:e;return function(e,t,i){function a(){f.forEach((function(e){return e()})),f=[]}void 0===i&&(i=n);var 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f="y"===a?"top":"left",p="y"===a?"bottom":"right",u=r.rects.reference[i]+r.rects.reference[a]-o[a]-r.rects.popper[i];o=o[a]-r.rects.reference[a];var d=r.elements.arrow&&h(r.elements.arrow);i=Math.max(s[f],Math.min(r.rects.popper[i]/2-n[i]/2+(u/2-o/2-(d?"y"===a?d.clientLeft||0:d.clientTop||0:0)),r.rects.popper[i]-n[i]-s[p])),r.modifiersData[e]=((t={})[a]=i,t)}},effect:function(e){var t=e.state,r=e.options;e=e.name;var n=r.element;n=void 0===n?"[data-popper-arrow]":n,r=void 0===(r=r.padding)?0:r,("string"!=typeof n||(n=t.elements.popper.querySelector(n)))&&D(t.elements.popper,n)&&(t.elements.arrow=n,t.modifiersData[e+"#persistent"]={padding:B("number"!=typeof r?r:T(r,q))})},requires:["popperOffsets"],requiresIfExists:["preventOverflow"]},{name:"hide",enabled:!0,phase:"main",requiresIfExists:["preventOverflow"],fn:function(e){var t=e.state;e=e.name;var r=t.rects.reference,n=t.rects.popper,o=t.modifiersData.preventOverflow,i=W(t,{elementContext:"reference"}),a=W(t,{altBoundary:!0});r=H(i,r),n=H(a,n,o),o=R(r),a=R(n),t.modifiersData[e]={referenceClippingOffsets:r,popperEscapeOffsets:n,isReferenceHidden:o,hasPopperEscaped:a},t.attributes.popper=Object.assign({},t.attributes.popper,{"data-popper-reference-hidden":o,"data-popper-escaped":a})}}],z=w({defaultModifiers:V});e.createPopper=z,e.defaultModifiers=V,e.popperGenerator=w,Object.defineProperty(e,"__esModule",{value:!0})}));
+/*
+ Copyright (C) Federico Zivolo 2019
+ Distributed under the MIT License (license terms are at http://opensource.org/licenses/MIT).
+ */(function(e,t){'object'==typeof exports&&'undefined'!=typeof module?module.exports=t():'function'==typeof define&&define.amd?define(t):e.Popper=t()})(this,function(){'use strict';function e(e){return e&&'[object Function]'==={}.toString.call(e)}function t(e,t){if(1!==e.nodeType)return[];var o=e.ownerDocument.defaultView,n=o.getComputedStyle(e,null);return t?n[t]:n}function o(e){return'HTML'===e.nodeName?e:e.parentNode||e.host}function n(e){if(!e)return document.body;switch(e.nodeName){case'HTML':case'BODY':return e.ownerDocument.body;case'#document':return e.body;}var i=t(e),r=i.overflow,p=i.overflowX,s=i.overflowY;return /(auto|scroll|overlay)/.test(r+s+p)?e:n(o(e))}function i(e){return e&&e.referenceNode?e.referenceNode:e}function r(e){return 11===e?re:10===e?pe:re||pe}function p(e){if(!e)return document.documentElement;for(var o=r(10)?document.body:null,n=e.offsetParent||null;n===o&&e.nextElementSibling;)n=(e=e.nextElementSibling).offsetParent;var i=n&&n.nodeName;return 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o[s]<r(n[d])&&(e.offsets.popper[d]=r(n[d])-o[a]),o[d]>r(n[s])&&(e.offsets.popper[d]=r(n[s])),e}},arrow:{order:500,enabled:!0,fn:function(e,o){var n;if(!K(e.instance.modifiers,'arrow','keepTogether'))return e;var i=o.element;if('string'==typeof i){if(i=e.instance.popper.querySelector(i),!i)return e;}else if(!e.instance.popper.contains(i))return console.warn('WARNING: `arrow.element` must be child of its popper element!'),e;var r=e.placement.split('-')[0],p=e.offsets,s=p.popper,d=p.reference,a=-1!==['left','right'].indexOf(r),l=a?'height':'width',f=a?'Top':'Left',m=f.toLowerCase(),h=a?'left':'top',c=a?'bottom':'right',u=S(i)[l];d[c]-u<s[m]&&(e.offsets.popper[m]-=s[m]-(d[c]-u)),d[m]+u>s[c]&&(e.offsets.popper[m]+=d[m]+u-s[c]),e.offsets.popper=g(e.offsets.popper);var b=d[m]+d[l]/2-u/2,w=t(e.instance.popper),y=parseFloat(w['margin'+f],10),E=parseFloat(w['border'+f+'Width'],10),v=b-e.offsets.popper[m]-y-E;return v=ee(Q(s[l]-u,v),0),e.arrowElement=i,e.offsets.arrow=(n={},ae(n,m,$(v)),ae(n,h,''),n),e},element:'[x-arrow]'},flip:{order:600,enabled:!0,fn:function(e,t){if(W(e.instance.modifiers,'inner'))return e;if(e.flipped&&e.placement===e.originalPlacement)return e;var o=v(e.instance.popper,e.instance.reference,t.padding,t.boundariesElement,e.positionFixed),n=e.placement.split('-')[0],i=T(n),r=e.placement.split('-')[1]||'',p=[];switch(t.behavior){case ce.FLIP:p=[n,i];break;case ce.CLOCKWISE:p=G(n);break;case ce.COUNTERCLOCKWISE:p=G(n,!0);break;default:p=t.behavior;}return p.forEach(function(s,d){if(n!==s||p.length===d+1)return e;n=e.placement.split('-')[0],i=T(n);var a=e.offsets.popper,l=e.offsets.reference,f=Z,m='left'===n&&f(a.right)>f(l.left)||'right'===n&&f(a.left)<f(l.right)||'top'===n&&f(a.bottom)>f(l.top)||'bottom'===n&&f(a.top)<f(l.bottom),h=f(a.left)<f(o.left),c=f(a.right)>f(o.right),g=f(a.top)<f(o.top),u=f(a.bottom)>f(o.bottom),b='left'===n&&h||'right'===n&&c||'top'===n&&g||'bottom'===n&&u,w=-1!==['top','bottom'].indexOf(n),y=!!t.flipVariations&&(w&&'start'===r&&h||w&&'end'===r&&c||!w&&'start'===r&&g||!w&&'end'===r&&u),E=!!t.flipVariationsByContent&&(w&&'start'===r&&c||w&&'end'===r&&h||!w&&'start'===r&&u||!w&&'end'===r&&g),v=y||E;(m||b||v)&&(e.flipped=!0,(m||b)&&(n=p[d+1]),v&&(r=z(r)),e.placement=n+(r?'-'+r:''),e.offsets.popper=le({},e.offsets.popper,C(e.instance.popper,e.offsets.reference,e.placement)),e=P(e.instance.modifiers,e,'flip'))}),e},behavior:'flip',padding:5,boundariesElement:'viewport',flipVariations:!1,flipVariationsByContent:!1},inner:{order:700,enabled:!1,fn:function(e){var t=e.placement,o=t.split('-')[0],n=e.offsets,i=n.popper,r=n.reference,p=-1!==['left','right'].indexOf(o),s=-1===['top','left'].indexOf(o);return i[p?'left':'top']=r[o]-(s?i[p?'width':'height']:0),e.placement=T(t),e.offsets.popper=g(i),e}},hide:{order:800,enabled:!0,fn:function(e){if(!K(e.instance.modifiers,'hide','preventOverflow'))return e;var t=e.offsets.reference,o=D(e.instance.modifiers,function(e){return'preventOverflow'===e.name}).boundaries;if(t.bottom<o.top||t.left>o.right||t.top>o.bottom||t.right<o.left){if(!0===e.hide)return e;e.hide=!0,e.attributes['x-out-of-boundaries']=''}else{if(!1===e.hide)return e;e.hide=!1,e.attributes['x-out-of-boundaries']=!1}return e}},computeStyle:{order:850,enabled:!0,fn:function(e,t){var o=t.x,n=t.y,i=e.offsets.popper,r=D(e.instance.modifiers,function(e){return'applyStyle'===e.name}).gpuAcceleration;void 0!==r&&console.warn('WARNING: `gpuAcceleration` option moved to `computeStyle` modifier and will not be supported in future versions of Popper.js!');var s,d,a=void 0===r?t.gpuAcceleration:r,l=p(e.instance.popper),f=u(l),m={position:i.position},h=q(e,2>window.devicePixelRatio||!fe),c='bottom'===o?'top':'bottom',g='right'===n?'left':'right',b=B('transform');if(d='bottom'==c?'HTML'===l.nodeName?-l.clientHeight+h.bottom:-f.height+h.bottom:h.top,s='right'==g?'HTML'===l.nodeName?-l.clientWidth+h.right:-f.width+h.right:h.left,a&&b)m[b]='translate3d('+s+'px, '+d+'px, 0)',m[c]=0,m[g]=0,m.willChange='transform';else{var w='bottom'==c?-1:1,y='right'==g?-1:1;m[c]=d*w,m[g]=s*y,m.willChange=c+', '+g}var E={"x-placement":e.placement};return e.attributes=le({},E,e.attributes),e.styles=le({},m,e.styles),e.arrowStyles=le({},e.offsets.arrow,e.arrowStyles),e},gpuAcceleration:!0,x:'bottom',y:'right'},applyStyle:{order:900,enabled:!0,fn:function(e){return V(e.instance.popper,e.styles),j(e.instance.popper,e.attributes),e.arrowElement&&Object.keys(e.arrowStyles).length&&V(e.arrowElement,e.arrowStyles),e},onLoad:function(e,t,o,n,i){var r=L(i,t,e,o.positionFixed),p=O(o.placement,r,t,e,o.modifiers.flip.boundariesElement,o.modifiers.flip.padding);return t.setAttribute('x-placement',p),V(t,{position:o.positionFixed?'fixed':'absolute'}),o},gpuAcceleration:void 0}}},ge});
 //# sourceMappingURL=popper.min.js.map
diff --git a/public/popper.min.js.map b/public/popper.min.js.map
index 6f73fde..7107f61 100644
--- a/public/popper.min.js.map
+++ b/public/popper.min.js.map
@@ -1 +1 @@
-{"version":3,"file":"popper.min.js","sources":["../../src/dom-utils/getBoundingClientRect.js","../../src/dom-utils/getWindow.js","../../src/dom-utils/getWindowScroll.js","../../src/dom-utils/instanceOf.js","../../src/dom-utils/getNodeName.js","../../src/dom-utils/getDocumentElement.js","../../src/dom-utils/getWindowScrollBarX.js","../../src/dom-utils/getCompositeRect.js","../../src/dom-utils/getNodeScroll.js","../../src/dom-utils/getHTMLElementScroll.js","../../src/dom-utils/getLayoutRect.js","../../src/dom-utils/getParentNode.js","../../src/dom-utils/getComputedStyle.js","../../src/dom-utils/listScrollParents.js","../../src/dom-utils/getScrollParent.js","../../src/dom-utils/getOffsetParent.js","../../src/dom-utils/isTableElement.js","../../src/utils/orderModifiers.js","../../src/utils/debounce.js","../../src/utils/getBasePlacement.js","../../src/index.js","../../src/utils/mergeByName.js","../../src/utils/getMainAxisFromPlacement.js","../../src/utils/computeOffsets.js","../../src/utils/getVariation.js","../../src/enums.js","../../src/modifiers/computeStyles.js","../../src/utils/getOppositePlacement.js","../../src/utils/getOppositeVariationPlacement.js","../../src/dom-utils/contains.js","../../src/utils/rectToClientRect.js","../../src/dom-utils/getClippingRect.js","../../src/dom-utils/getViewportRect.js","../../src/dom-utils/getDocumentRect.js","../../src/dom-utils/getDecorations.js","../../src/dom-utils/getBorders.js","../../src/utils/mergePaddingObject.js","../../src/utils/getFreshSideObject.js","../../src/utils/expandToHashMap.js","../../src/utils/detectOverflow.js","../../src/modifiers/hide.js","../../src/modifiers/eventListeners.js","../../src/popper.js","../../src/modifiers/popperOffsets.js","../../src/modifiers/applyStyles.js","../../src/modifiers/offset.js","../../src/modifiers/flip.js","../../src/utils/computeAutoPlacement.js","../../src/modifiers/preventOverflow.js","../../src/utils/getAltAxis.js","../../src/utils/within.js","../../src/modifiers/arrow.js"],"sourcesContent":["// @flow\nimport type { ClientRectObject, VirtualElement } from '../types';\n\nexport default function getBoundingClientRect(\n  element: Element | VirtualElement\n): ClientRectObject {\n  const rect = element.getBoundingClientRect();\n\n  return {\n    width: rect.width,\n    height: rect.height,\n    top: rect.top,\n    right: rect.right,\n    bottom: rect.bottom,\n    left: rect.left,\n    x: rect.left,\n    y: rect.top,\n  };\n}\n","// @flow\n/*:: import type { Window } from '../types'; */\n/*:: declare function getWindow(node: Node | Window): Window; */\n\nexport default function getWindow(node) {\n  if (node.toString() !== '[object Window]') {\n    const ownerDocument = node.ownerDocument;\n    return ownerDocument ? ownerDocument.defaultView : window;\n  }\n\n  return node;\n}\n","// @flow\nimport getWindow from './getWindow';\nimport type { Window } from '../types';\n\nexport default function getWindowScroll(node: Node | Window) {\n  const win = getWindow(node);\n  const scrollLeft = win.pageXOffset;\n  const scrollTop = win.pageYOffset;\n\n  return {\n    scrollLeft,\n    scrollTop,\n  };\n}\n","// @flow\nimport getWindow from './getWindow';\n\n/*:: declare function isElement(node: mixed): boolean %checks(node instanceof\n  Element); */\n\nfunction isElement(node) {\n  const OwnElement = getWindow(node).Element;\n  return node instanceof OwnElement || node instanceof Element;\n}\n\n/*:: declare function isHTMLElement(node: mixed): boolean %checks(node instanceof\n  HTMLElement); */\n\nfunction isHTMLElement(node) {\n  const OwnElement = getWindow(node).HTMLElement;\n  return node instanceof OwnElement || node instanceof HTMLElement;\n}\n\nexport { isElement, isHTMLElement };\n","// @flow\nimport type { Window } from '../types';\n\nexport default function getNodeName(element: ?Node | Window): ?string {\n  return element ? (element.nodeName || '').toLowerCase() : null;\n}\n","// @flow\nimport { isElement } from './instanceOf';\nimport type { Window } from '../types';\n\nexport default function getDocumentElement(\n  element: Element | Window\n): HTMLElement {\n  // $FlowFixMe: assume body is always available\n  return (isElement(element) ? element.ownerDocument : element.document)\n    .documentElement;\n}\n","// @flow\nimport getBoundingClientRect from './getBoundingClientRect';\nimport getDocumentElement from './getDocumentElement';\nimport getWindowScroll from './getWindowScroll';\n\nexport default function getWindowScrollBarX(element: Element): number {\n  // If <html> has a CSS width greater than the viewport, then this will be\n  // incorrect for RTL.\n  // Popper 1 is broken in this case and never had a bug report so let's assume\n  // it's not an issue. I don't think anyone ever specifies width on <html>\n  // anyway.\n  // Browsers where the left scrollbar doesn't cause an issue report `0` for\n  // this (e.g. Edge 2019, IE11, Safari)\n  return (\n    getBoundingClientRect(getDocumentElement(element)).left +\n    getWindowScroll(element).scrollLeft\n  );\n}\n","// @flow\nimport type { Rect, VirtualElement, Window } from '../types';\nimport getBoundingClientRect from './getBoundingClientRect';\nimport getNodeScroll from './getNodeScroll';\nimport getNodeName from './getNodeName';\nimport { isHTMLElement } from './instanceOf';\nimport getWindowScrollBarX from './getWindowScrollBarX';\nimport getDocumentElement from './getDocumentElement';\n\n// Returns the composite rect of an element relative to its offsetParent.\n// Composite means it takes into account transforms as well as layout.\nexport default function getCompositeRect(\n  elementOrVirtualElement: Element | VirtualElement,\n  offsetParent: Element | Window,\n  isFixed: boolean = false\n): Rect {\n  let documentElement;\n  const rect = getBoundingClientRect(elementOrVirtualElement);\n\n  let scroll = { scrollLeft: 0, scrollTop: 0 };\n  let offsets = { x: 0, y: 0 };\n\n  if (!isFixed) {\n    if (getNodeName(offsetParent) !== 'body') {\n      scroll = getNodeScroll(offsetParent);\n    }\n\n    if (isHTMLElement(offsetParent)) {\n      offsets = getBoundingClientRect(offsetParent);\n      offsets.x += offsetParent.clientLeft;\n      offsets.y += offsetParent.clientTop;\n    } else if ((documentElement = getDocumentElement(offsetParent))) {\n      offsets.x = getWindowScrollBarX(documentElement);\n    }\n  }\n\n  return {\n    x: rect.left + scroll.scrollLeft - offsets.x,\n    y: rect.top + scroll.scrollTop - offsets.y,\n    width: rect.width,\n    height: rect.height,\n  };\n}\n","// @flow\nimport getWindowScroll from './getWindowScroll';\nimport getWindow from './getWindow';\nimport { isHTMLElement } from './instanceOf';\nimport getHTMLElementScroll from './getHTMLElementScroll';\nimport type { Window } from '../types';\n\nexport default function getNodeScroll(node: Node | Window) {\n  if (node === getWindow(node) || !isHTMLElement(node)) {\n    return getWindowScroll(node);\n  } else {\n    return getHTMLElementScroll(node);\n  }\n}\n","// @flow\n\nexport default function getHTMLElementScroll(element: HTMLElement) {\n  return {\n    scrollLeft: element.scrollLeft,\n    scrollTop: element.scrollTop,\n  };\n}\n","// @flow\nimport type { Rect } from '../types';\n\n// Returns the layout rect of an element relative to its offsetParent. Layout\n// means it doesn't take into account transforms.\nexport default function getLayoutRect(element: HTMLElement): Rect {\n  return {\n    x: element.offsetLeft,\n    y: element.offsetTop,\n    width: element.offsetWidth,\n    height: element.offsetHeight,\n  };\n}\n","// @flow\nimport getNodeName from './getNodeName';\n\nexport default function getParentNode(element: Node | ShadowRoot): Node {\n  if (getNodeName(element) === 'html') {\n    return element;\n  }\n\n  return (\n    element.parentNode || // DOM Element detected\n    // $FlowFixMe: need a better way to handle this...\n    element.host || // ShadowRoot detected\n    document.ownerDocument || // Fallback to ownerDocument if available\n    document.documentElement // Or to documentElement if everything else fails\n  );\n}\n","// @flow\nimport getWindow from './getWindow';\n\nexport default function getComputedStyle(\n  element: Element\n): CSSStyleDeclaration {\n  return getWindow(element).getComputedStyle(element);\n}\n","// @flow\nimport getScrollParent from './getScrollParent';\nimport getParentNode from './getParentNode';\nimport getNodeName from './getNodeName';\nimport getWindow from './getWindow';\nimport type { Window } from '../types';\n\nexport default function listScrollParents(\n  element: Node,\n  list: Array<Element | Window> = []\n): Array<Element | Window> {\n  const scrollParent = getScrollParent(element);\n  const isBody = getNodeName(scrollParent) === 'body';\n  const target = isBody ? getWindow(scrollParent) : scrollParent;\n  const updatedList = list.concat(target);\n\n  return isBody\n    ? updatedList\n    : // $FlowFixMe: isBody tells us target will be an HTMLElement here\n      updatedList.concat(listScrollParents(getParentNode(target)));\n}\n","// @flow\nimport getParentNode from './getParentNode';\nimport getComputedStyle from './getComputedStyle';\nimport getNodeName from './getNodeName';\nimport { isHTMLElement } from './instanceOf';\n\nexport default function getScrollParent(node: Node): HTMLElement {\n  if (['html', 'body', '#document'].indexOf(getNodeName(node)) >= 0) {\n    // $FlowFixMe: assume body is always available\n    return node.ownerDocument.body;\n  }\n\n  if (isHTMLElement(node)) {\n    // Firefox wants us to check `-x` and `-y` variations as well\n    const { overflow, overflowX, overflowY } = getComputedStyle(node);\n\n    if (/auto|scroll|overlay|hidden/.test(overflow + overflowY + overflowX)) {\n      return node;\n    }\n  }\n\n  return getScrollParent(getParentNode(node));\n}\n","// @flow\nimport getWindow from './getWindow';\nimport getNodeName from './getNodeName';\nimport getComputedStyle from './getComputedStyle';\nimport { isHTMLElement } from './instanceOf';\nimport isTableElement from './isTableElement';\n\n// https://stackoverflow.com/a/9851769/2059996\nconst isFirefox = () => typeof window.InstallTrigger !== 'undefined';\n\nfunction getTrueOffsetParent(element: Element): ?Element {\n  let offsetParent;\n\n  if (\n    !isHTMLElement(element) ||\n    !(offsetParent = element.offsetParent) ||\n    // https://github.com/popperjs/popper-core/issues/837\n    (isFirefox() && getComputedStyle(offsetParent).position === 'fixed')\n  ) {\n    return null;\n  }\n\n  return offsetParent;\n}\n\nexport default function getOffsetParent(element: Element) {\n  const window = getWindow(element);\n\n  let offsetParent = getTrueOffsetParent(element);\n\n  // Find the nearest non-table offsetParent\n  while (offsetParent && isTableElement(offsetParent)) {\n    offsetParent = getTrueOffsetParent(offsetParent);\n  }\n\n  if (\n    offsetParent &&\n    getNodeName(offsetParent) === 'body' &&\n    getComputedStyle(offsetParent).position === 'static'\n  ) {\n    return window;\n  }\n\n  return offsetParent || window;\n}\n","// @flow\nimport getNodeName from './getNodeName';\n\nexport default function isTableElement(element: Element): boolean {\n  return ['table', 'td', 'th'].indexOf(getNodeName(element)) >= 0;\n}\n","// @flow\nimport type { Modifier } from '../types';\nimport { modifierPhases } from '../enums';\n\n// source: https://stackoverflow.com/questions/49875255\nfunction order(modifiers) {\n  const map = new Map();\n  const visited = new Set();\n  const result = [];\n\n  modifiers.forEach(modifier => {\n    map.set(modifier.name, modifier);\n  });\n\n  // On visiting object, check for its dependencies and visit them recursively\n  function sort(modifier: Modifier<any>) {\n    visited.add(modifier.name);\n\n    const requires = [\n      ...(modifier.requires || []),\n      ...(modifier.requiresIfExists || []),\n    ];\n\n    requires.forEach(dep => {\n      if (!visited.has(dep)) {\n        const depModifier = map.get(dep);\n\n        if (depModifier) {\n          sort(depModifier);\n        }\n      }\n    });\n\n    result.push(modifier);\n  }\n\n  modifiers.forEach(modifier => {\n    if (!visited.has(modifier.name)) {\n      // check for visited object\n      sort(modifier);\n    }\n  });\n\n  return result;\n}\n\nexport default function orderModifiers(\n  modifiers: Array<Modifier<any>>\n): Array<Modifier<any>> {\n  // order based on dependencies\n  const orderedModifiers = order(modifiers);\n\n  // order based on phase\n  return modifierPhases.reduce((acc, phase) => {\n    return acc.concat(\n      orderedModifiers.filter(modifier => modifier.phase === phase)\n    );\n  }, []);\n}\n","// @flow\n\nexport default function debounce<T>(fn: Function): () => Promise<T> {\n  let pending;\n  return () => {\n    if (!pending) {\n      pending = new Promise<T>(resolve => {\n        Promise.resolve().then(() => {\n          pending = undefined;\n          resolve(fn());\n        });\n      });\n    }\n\n    return pending;\n  };\n}\n","// @flow\nimport { type BasePlacement, type Placement, auto } from '../enums';\n\nexport default function getBasePlacement(\n  placement: Placement | typeof auto\n): BasePlacement {\n  return (placement.split('-')[0]: any);\n}\n","// @flow\nimport type {\n  State,\n  Options,\n  Modifier,\n  Instance,\n  VirtualElement,\n} from './types';\nimport getCompositeRect from './dom-utils/getCompositeRect';\nimport getLayoutRect from './dom-utils/getLayoutRect';\nimport listScrollParents from './dom-utils/listScrollParents';\nimport getOffsetParent from './dom-utils/getOffsetParent';\nimport getComputedStyle from './dom-utils/getComputedStyle';\nimport orderModifiers from './utils/orderModifiers';\nimport debounce from './utils/debounce';\nimport validateModifiers from './utils/validateModifiers';\nimport uniqueBy from './utils/uniqueBy';\nimport getBasePlacement from './utils/getBasePlacement';\nimport mergeByName from './utils/mergeByName';\nimport { isElement } from './dom-utils/instanceOf';\nimport { auto } from './enums';\n\nexport * from './types';\nexport * from './enums';\n\nconst INVALID_ELEMENT_ERROR =\n  'Popper: Invalid reference or popper argument provided. They must be either a DOM element or virtual element.';\nconst INFINITE_LOOP_ERROR =\n  'Popper: An infinite loop in the modifiers cycle has been detected! The cycle has been interrupted to prevent a browser crash.';\n\nconst DEFAULT_OPTIONS: Options = {\n  placement: 'bottom',\n  modifiers: [],\n  strategy: 'absolute',\n};\n\ntype PopperGeneratorArgs = {\n  defaultModifiers?: Array<Modifier<any>>,\n  defaultOptions?: $Shape<Options>,\n};\n\nfunction areValidElements(...args: Array<any>): boolean {\n  return !args.some(\n    element => !(element && typeof element.getBoundingClientRect === 'function')\n  );\n}\n\nexport function popperGenerator(generatorOptions: PopperGeneratorArgs = {}) {\n  const {\n    defaultModifiers = [],\n    defaultOptions = DEFAULT_OPTIONS,\n  } = generatorOptions;\n\n  return function createPopper(\n    reference: Element | VirtualElement,\n    popper: HTMLElement,\n    options: $Shape<Options> = defaultOptions\n  ): Instance {\n    let state: $Shape<State> = {\n      placement: 'bottom',\n      orderedModifiers: [],\n      options: { ...DEFAULT_OPTIONS, ...defaultOptions },\n      modifiersData: {},\n      elements: {\n        reference,\n        popper,\n      },\n      attributes: {},\n      styles: {},\n    };\n\n    let effectCleanupFns: Array<() => void> = [];\n    let isDestroyed = false;\n\n    const instance = {\n      state,\n      setOptions(options) {\n        cleanupModifierEffects();\n\n        state.options = {\n          ...defaultOptions,\n          ...state.options,\n          ...options,\n        };\n\n        state.scrollParents = {\n          reference: isElement(reference) ? listScrollParents(reference) : [],\n          popper: listScrollParents(popper),\n        };\n\n        // Orders the modifiers based on their dependencies and `phase`\n        // properties\n        const orderedModifiers = orderModifiers(\n          mergeByName([...defaultModifiers, ...state.options.modifiers])\n        );\n\n        // Strip out disabled modifiers\n        state.orderedModifiers = orderedModifiers.filter(m => m.enabled);\n\n        // Validate the provided modifiers so that the consumer will get warned\n        // if one of the modifiers is invalid for any reason\n        if (__DEV__) {\n          const modifiers = uniqueBy(\n            [...orderedModifiers, ...state.options.modifiers],\n            ({ name }) => name\n          );\n\n          validateModifiers(modifiers);\n\n          if (getBasePlacement(state.options.placement) === auto) {\n            const flipModifier = state.orderedModifiers.find(\n              ({ name }) => name === 'flip'\n            );\n\n            if (!flipModifier) {\n              console.error(\n                [\n                  'Popper: \"auto\" placements require the \"flip\" modifier be',\n                  'present and enabled to work.',\n                ].join(' ')\n              );\n            }\n          }\n\n          const {\n            marginTop,\n            marginRight,\n            marginBottom,\n            marginLeft,\n          } = getComputedStyle(popper);\n\n          // We no longer take into account `margins` on the popper, and it can\n          // cause bugs with positioning, so we'll warn the consumer\n          if (\n            [marginTop, marginRight, marginBottom, marginLeft].some(margin =>\n              parseFloat(margin)\n            )\n          ) {\n            console.warn(\n              [\n                'Popper: CSS \"margin\" styles cannot be used to apply padding',\n                'between the popper and its reference element or boundary.',\n                'To replicate margin, use the `offset` modifier, as well as',\n                'the `padding` option in the `preventOverflow` and `flip`',\n                'modifiers.',\n              ].join(' ')\n            );\n          }\n        }\n\n        runModifierEffects();\n\n        return instance.update();\n      },\n\n      // Sync update – it will always be executed, even if not necessary. This\n      // is useful for low frequency updates where sync behavior simplifies the\n      // logic.\n      // For high frequency updates (e.g. `resize` and `scroll` events), always\n      // prefer the async Popper#update method\n      forceUpdate() {\n        if (isDestroyed) {\n          return;\n        }\n\n        const { reference, popper } = state.elements;\n\n        // Don't proceed if `reference` or `popper` are not valid elements\n        // anymore\n        if (!areValidElements(reference, popper)) {\n          if (__DEV__) {\n            console.error(INVALID_ELEMENT_ERROR);\n          }\n          return;\n        }\n\n        // Store the reference and popper rects to be read by modifiers\n        state.rects = {\n          reference: getCompositeRect(\n            reference,\n            getOffsetParent(popper),\n            state.options.strategy === 'fixed'\n          ),\n          popper: getLayoutRect(popper),\n        };\n\n        // Modifiers have the ability to reset the current update cycle. The\n        // most common use case for this is the `flip` modifier changing the\n        // placement, which then needs to re-run all the modifiers, because the\n        // logic was previously ran for the previous placement and is therefore\n        // stale/incorrect\n        state.reset = false;\n\n        state.placement = state.options.placement;\n\n        // On each update cycle, the `modifiersData` property for each modifier\n        // is filled with the initial data specified by the modifier. This means\n        // it doesn't persist and is fresh on each update.\n        // To ensure persistent data, use `${name}#persistent`\n        state.orderedModifiers.forEach(\n          modifier =>\n            (state.modifiersData[modifier.name] = {\n              ...modifier.data,\n            })\n        );\n\n        let __debug_loops__ = 0;\n        for (let index = 0; index < state.orderedModifiers.length; index++) {\n          if (__DEV__) {\n            __debug_loops__ += 1;\n            if (__debug_loops__ > 100) {\n              console.error(INFINITE_LOOP_ERROR);\n              break;\n            }\n          }\n\n          if (state.reset === true) {\n            state.reset = false;\n            index = -1;\n            continue;\n          }\n\n          const { fn, options = {}, name } = state.orderedModifiers[index];\n\n          if (typeof fn === 'function') {\n            state = fn({ state, options, name, instance }) || state;\n          }\n        }\n      },\n\n      // Async and optimistically optimized update – it will not be executed if\n      // not necessary (debounced to run at most once-per-tick)\n      update: debounce<$Shape<State>>(\n        () =>\n          new Promise<$Shape<State>>(resolve => {\n            instance.forceUpdate();\n            resolve(state);\n          })\n      ),\n\n      destroy() {\n        cleanupModifierEffects();\n        isDestroyed = true;\n      },\n    };\n\n    if (!areValidElements(reference, popper)) {\n      if (__DEV__) {\n        console.error(INVALID_ELEMENT_ERROR);\n      }\n      return instance;\n    }\n\n    instance.setOptions(options).then(state => {\n      if (!isDestroyed && options.onFirstUpdate) {\n        options.onFirstUpdate(state);\n      }\n    });\n\n    // Modifiers have the ability to execute arbitrary code before the first\n    // update cycle runs. They will be executed in the same order as the update\n    // cycle. This is useful when a modifier adds some persistent data that\n    // other modifiers need to use, but the modifier is run after the dependent\n    // one.\n    function runModifierEffects() {\n      state.orderedModifiers.forEach(({ name, options = {}, effect }) => {\n        if (typeof effect === 'function') {\n          const cleanupFn = effect({ state, name, instance, options });\n          const noopFn = () => {};\n          effectCleanupFns.push(cleanupFn || noopFn);\n        }\n      });\n    }\n\n    function cleanupModifierEffects() {\n      effectCleanupFns.forEach(fn => fn());\n      effectCleanupFns = [];\n    }\n\n    return instance;\n  };\n}\n\nexport const createPopper = popperGenerator();\n","// @flow\nimport type { Modifier } from '../types';\n\nexport default function mergeByName(\n  modifiers: Array<$Shape<Modifier<any>>>\n): Array<$Shape<Modifier<any>>> {\n  const merged = modifiers.reduce((merged, current) => {\n    const existing = merged[current.name];\n    merged[current.name] = existing\n      ? {\n          ...existing,\n          ...current,\n          options: { ...existing.options, ...current.options },\n          data: { ...existing.data, ...current.data },\n        }\n      : current;\n    return merged;\n  }, {});\n\n  // IE11 does not support Object.values\n  return Object.keys(merged).map(key => merged[key]);\n}\n","// @flow\nimport type { Placement } from '../enums';\n\nexport default function getMainAxisFromPlacement(\n  placement: Placement\n): 'x' | 'y' {\n  return ['top', 'bottom'].indexOf(placement) >= 0 ? 'x' : 'y';\n}\n","// @flow\nimport getBasePlacement from './getBasePlacement';\nimport getVariation from './getVariation';\nimport getMainAxisFromPlacement from './getMainAxisFromPlacement';\nimport type {\n  Rect,\n  PositioningStrategy,\n  Offsets,\n  ClientRectObject,\n} from '../types';\nimport { top, right, bottom, left, start, end, type Placement } from '../enums';\n\nexport default function computeOffsets({\n  reference,\n  element,\n  placement,\n}: {\n  reference: Rect | ClientRectObject,\n  element: Rect | ClientRectObject,\n  strategy: PositioningStrategy,\n  placement?: Placement,\n}): Offsets {\n  const basePlacement = placement ? getBasePlacement(placement) : null;\n  const variation = placement ? getVariation(placement) : null;\n  const commonX = reference.x + reference.width / 2 - element.width / 2;\n  const commonY = reference.y + reference.height / 2 - element.height / 2;\n\n  let offsets;\n  switch (basePlacement) {\n    case top:\n      offsets = {\n        x: commonX,\n        y: reference.y - element.height,\n      };\n      break;\n    case bottom:\n      offsets = {\n        x: commonX,\n        y: reference.y + reference.height,\n      };\n      break;\n    case right:\n      offsets = {\n        x: reference.x + reference.width,\n        y: commonY,\n      };\n      break;\n    case left:\n      offsets = {\n        x: reference.x - element.width,\n        y: commonY,\n      };\n      break;\n    default:\n      offsets = {\n        x: reference.x,\n        y: reference.y,\n      };\n  }\n\n  const mainAxis = basePlacement\n    ? getMainAxisFromPlacement(basePlacement)\n    : null;\n\n  if (mainAxis != null) {\n    const len = mainAxis === 'y' ? 'height' : 'width';\n\n    switch (variation) {\n      case start:\n        offsets[mainAxis] =\n          Math.floor(offsets[mainAxis]) -\n          Math.floor(reference[len] / 2 - element[len] / 2);\n        break;\n      case end:\n        offsets[mainAxis] =\n          Math.floor(offsets[mainAxis]) +\n          Math.ceil(reference[len] / 2 - element[len] / 2);\n        break;\n      default:\n    }\n  }\n\n  return offsets;\n}\n","// @flow\nimport { type Variation, type Placement } from '../enums';\n\nexport default function getVariation(placement: Placement): ?Variation {\n  return (placement.split('-')[1]: any);\n}\n","// @flow\nexport const top: 'top' = 'top';\nexport const bottom: 'bottom' = 'bottom';\nexport const right: 'right' = 'right';\nexport const left: 'left' = 'left';\nexport const auto: 'auto' = 'auto';\nexport type BasePlacement =\n  | typeof top\n  | typeof bottom\n  | typeof right\n  | typeof left;\nexport const basePlacements: Array<BasePlacement> = [top, bottom, right, left];\n\nexport const start: 'start' = 'start';\nexport const end: 'end' = 'end';\nexport type Variation = typeof start | typeof end;\n\nexport const clippingParents: 'clippingParents' = 'clippingParents';\nexport const viewport: 'viewport' = 'viewport';\nexport type Boundary =\n  | HTMLElement\n  | Array<HTMLElement>\n  | typeof clippingParents;\nexport type RootBoundary = typeof viewport | 'document';\n\nexport const popper: 'popper' = 'popper';\nexport const reference: 'reference' = 'reference';\nexport type Context = typeof popper | typeof reference;\n\nexport type VariationPlacement =\n  | 'top-start'\n  | 'top-end'\n  | 'bottom-start'\n  | 'bottom-end'\n  | 'right-start'\n  | 'right-end'\n  | 'left-start'\n  | 'left-end';\nexport type AutoPlacement = 'auto' | 'auto-start' | 'auto-end';\nexport type ComputedPlacement = VariationPlacement | BasePlacement;\nexport type Placement = AutoPlacement | BasePlacement | VariationPlacement;\n\nexport const variationPlacements: Array<VariationPlacement> = basePlacements.reduce(\n  (acc: Array<VariationPlacement>, placement: BasePlacement) =>\n    acc.concat([(`${placement}-${start}`: any), (`${placement}-${end}`: any)]),\n  []\n);\nexport const placements: Array<Placement> = [...basePlacements, auto].reduce(\n  (\n    acc: Array<Placement>,\n    placement: BasePlacement | typeof auto\n  ): Array<Placement> =>\n    acc.concat([\n      placement,\n      (`${placement}-${start}`: any),\n      (`${placement}-${end}`: any),\n    ]),\n  []\n);\n\n// modifiers that need to read the DOM\nexport const beforeRead: 'beforeRead' = 'beforeRead';\nexport const read: 'read' = 'read';\nexport const afterRead: 'afterRead' = 'afterRead';\n// pure-logic modifiers\nexport const beforeMain: 'beforeMain' = 'beforeMain';\nexport const main: 'main' = 'main';\nexport const afterMain: 'afterMain' = 'afterMain';\n// modifier with the purpose to write to the DOM (or write into a framework state)\nexport const beforeWrite: 'beforeWrite' = 'beforeWrite';\nexport const write: 'write' = 'write';\nexport const afterWrite: 'afterWrite' = 'afterWrite';\nexport const modifierPhases: Array<ModifierPhases> = [\n  beforeRead,\n  read,\n  afterRead,\n  beforeMain,\n  main,\n  afterMain,\n  beforeWrite,\n  write,\n  afterWrite,\n];\n\nexport type ModifierPhases =\n  | typeof beforeRead\n  | typeof read\n  | typeof afterRead\n  | typeof beforeMain\n  | typeof main\n  | typeof afterMain\n  | typeof beforeWrite\n  | typeof write\n  | typeof afterWrite;\n","// @flow\nimport type {\n  PositioningStrategy,\n  Offsets,\n  Modifier,\n  ModifierArguments,\n  Rect,\n  Window,\n} from '../types';\nimport { type BasePlacement, top, left, right, bottom } from '../enums';\nimport getOffsetParent from '../dom-utils/getOffsetParent';\nimport getWindow from '../dom-utils/getWindow';\nimport getDocumentElement from '../dom-utils/getDocumentElement';\nimport getComputedStyle from '../dom-utils/getComputedStyle';\nimport getBasePlacement from '../utils/getBasePlacement';\n\ntype Options = {\n  gpuAcceleration: boolean,\n  adaptive: boolean,\n};\n\nconst unsetSides = {\n  top: 'auto',\n  right: 'auto',\n  bottom: 'auto',\n  left: 'auto',\n};\n\n// Round the offsets to the nearest suitable subpixel based on the DPR.\n// Zooming can change the DPR, but it seems to report a value that will\n// cleanly divide the values into the appropriate subpixels.\nfunction roundOffsets({ x, y }): Offsets {\n  const win: Window = window;\n  const dpr = win.devicePixelRatio || 1;\n\n  return {\n    x: Math.round(x * dpr) / dpr || 0,\n    y: Math.round(y * dpr) / dpr || 0,\n  };\n}\n\nexport function mapToStyles({\n  popper,\n  popperRect,\n  placement,\n  offsets,\n  position,\n  gpuAcceleration,\n  adaptive,\n}: {\n  popper: HTMLElement,\n  popperRect: Rect,\n  placement: BasePlacement,\n  offsets: Offsets,\n  position: PositioningStrategy,\n  gpuAcceleration: boolean,\n  adaptive: boolean,\n}) {\n  let { x, y } = roundOffsets(offsets);\n\n  const hasX = offsets.hasOwnProperty('x');\n  const hasY = offsets.hasOwnProperty('y');\n\n  let sideX: string = left;\n  let sideY: string = top;\n\n  const win: Window = window;\n\n  if (adaptive) {\n    let offsetParent = getOffsetParent(popper);\n    if (offsetParent === getWindow(popper)) {\n      offsetParent = getDocumentElement(popper);\n    }\n\n    // $FlowFixMe: force type refinement, we compare offsetParent with window above, but Flow doesn't detect it\n    /*:: offsetParent = (offsetParent: Element); */\n\n    if (placement === top) {\n      sideY = bottom;\n      y -= offsetParent.clientHeight - popperRect.height;\n      y *= gpuAcceleration ? 1 : -1;\n    }\n\n    if (placement === left) {\n      sideX = right;\n      x -= offsetParent.clientWidth - popperRect.width;\n      x *= gpuAcceleration ? 1 : -1;\n    }\n  }\n\n  const commonStyles = {\n    position,\n    ...(adaptive && unsetSides),\n  };\n\n  if (gpuAcceleration) {\n    return {\n      ...commonStyles,\n      [sideY]: hasY ? '0' : '',\n      [sideX]: hasX ? '0' : '',\n      // Layer acceleration can disable subpixel rendering which causes slightly\n      // blurry text on low PPI displays, so we want to use 2D transforms\n      // instead\n      transform:\n        (win.devicePixelRatio || 1) < 2\n          ? `translate(${x}px, ${y}px)`\n          : `translate3d(${x}px, ${y}px, 0)`,\n    };\n  }\n\n  return {\n    ...commonStyles,\n    [sideY]: hasY ? `${y}px` : '',\n    [sideX]: hasX ? `${x}px` : '',\n    transform: '',\n  };\n}\n\nfunction computeStyles({ state, options }: ModifierArguments<Options>) {\n  const { gpuAcceleration = true, adaptive = true } = options;\n\n  if (__DEV__) {\n    const { transitionProperty } = getComputedStyle(state.elements.popper);\n\n    if (\n      adaptive &&\n      ['transform', 'top', 'right', 'bottom', 'left'].some(\n        property => transitionProperty.indexOf(property) >= 0\n      )\n    ) {\n      console.warn(\n        [\n          'Popper: Detected CSS transitions on at least one of the following',\n          'CSS properties: \"transform\", \"top\", \"right\", \"bottom\", \"left\".',\n          '\\n\\n',\n          'Disable the \"computeStyles\" modifier\\'s `adaptive` option to allow',\n          'for smooth transitions, or remove these properties from the CSS',\n          'transition declaration on the popper element if only transitioning',\n          'opacity or background-color for example.',\n          '\\n\\n',\n          'We recommend using the popper element as a wrapper around an inner',\n          'element that can have any CSS property transitioned for animations.',\n        ].join(' ')\n      );\n    }\n  }\n\n  const commonStyles = {\n    placement: getBasePlacement(state.placement),\n    popper: state.elements.popper,\n    popperRect: state.rects.popper,\n    gpuAcceleration,\n  };\n\n  // popper offsets are always available\n  state.styles.popper = {\n    ...state.styles.popper,\n    ...mapToStyles({\n      ...commonStyles,\n      offsets: state.modifiersData.popperOffsets,\n      position: state.options.strategy,\n      adaptive,\n    }),\n  };\n\n  // arrow offsets may not be available\n  if (state.modifiersData.arrow != null) {\n    state.styles.arrow = {\n      ...state.styles.arrow,\n      ...mapToStyles({\n        ...commonStyles,\n        offsets: state.modifiersData.arrow,\n        position: 'absolute',\n        adaptive: false,\n      }),\n    };\n  }\n\n  state.attributes.popper = {\n    ...state.attributes.popper,\n    'data-popper-placement': state.placement,\n  };\n}\n\nexport default ({\n  name: 'computeStyles',\n  enabled: true,\n  phase: 'beforeWrite',\n  fn: computeStyles,\n  data: {},\n}: Modifier<Options>);\n","// @flow\nimport type { Placement } from '../enums';\n\nconst hash = { left: 'right', right: 'left', bottom: 'top', top: 'bottom' };\n\nexport default function getOppositePlacement(placement: Placement): Placement {\n  return (placement.replace(\n    /left|right|bottom|top/g,\n    matched => hash[matched]\n  ): any);\n}\n","// @flow\nimport type { Placement } from '../enums';\n\nconst hash = { start: 'end', end: 'start' };\n\nexport default function getOppositeVariationPlacement(\n  placement: Placement\n): Placement {\n  return (placement.replace(/start|end/g, matched => hash[matched]): any);\n}\n","// @flow\nexport default function contains(parent: Element, child: Element) {\n  // $FlowFixMe: hasOwnProperty doesn't seem to work in tests\n  const isShadow = Boolean(child.getRootNode && child.getRootNode().host);\n\n  // First, attempt with faster native method\n  if (parent.contains(child)) {\n    return true;\n  }\n  // then fallback to custom implementation with Shadow DOM support\n  else if (isShadow) {\n    let next = child;\n    do {\n      if (next && parent.isSameNode(next)) {\n        return true;\n      }\n      // $FlowFixMe: need a better way to handle this...\n      next = next.parentNode || next.host;\n    } while (next);\n  }\n\n  // Give up, the result is false\n  return false;\n}\n","// @flow\nimport type { Rect, ClientRectObject } from '../types';\n\nexport default function rectToClientRect(rect: Rect): ClientRectObject {\n  return {\n    ...rect,\n    left: rect.x,\n    top: rect.y,\n    right: rect.x + rect.width,\n    bottom: rect.y + rect.height,\n  };\n}\n","// @flow\nimport type { ClientRectObject } from '../types';\nimport type { Boundary, RootBoundary } from '../enums';\nimport { viewport } from '../enums';\nimport getViewportRect from './getViewportRect';\nimport getDocumentRect from './getDocumentRect';\nimport listScrollParents from './listScrollParents';\nimport getOffsetParent from './getOffsetParent';\nimport getDocumentElement from './getDocumentElement';\nimport getComputedStyle from './getComputedStyle';\nimport { isElement, isHTMLElement } from './instanceOf';\nimport getBoundingClientRect from './getBoundingClientRect';\nimport getDecorations from './getDecorations';\nimport contains from './contains';\nimport rectToClientRect from '../utils/rectToClientRect';\n\nfunction getClientRectFromMixedType(\n  element: Element,\n  clippingParent: Element | RootBoundary\n): ClientRectObject {\n  return clippingParent === viewport\n    ? rectToClientRect(getViewportRect(element))\n    : isHTMLElement(clippingParent)\n    ? getBoundingClientRect(clippingParent)\n    : rectToClientRect(getDocumentRect(getDocumentElement(element)));\n}\n\n// A \"clipping parent\" is an overflowable container with the characteristic of\n// clipping (or hiding) overflowing elements with a position different from\n// `initial`\nfunction getClippingParents(element: Element): Array<Element> {\n  const clippingParents = listScrollParents(element);\n  const canEscapeClipping =\n    ['absolute', 'fixed'].indexOf(getComputedStyle(element).position) >= 0;\n  const clipperElement =\n    canEscapeClipping && isHTMLElement(element)\n      ? getOffsetParent(element)\n      : element;\n\n  if (!isElement(clipperElement)) {\n    return [];\n  }\n\n  // $FlowFixMe: https://github.com/facebook/flow/issues/1414\n  return clippingParents.filter(\n    clippingParent =>\n      isElement(clippingParent) && contains(clippingParent, clipperElement)\n  );\n}\n\n// Gets the maximum area that the element is visible in due to any number of\n// clipping parents\nexport default function getClippingRect(\n  element: Element,\n  boundary: Boundary,\n  rootBoundary: RootBoundary\n): ClientRectObject {\n  const mainClippingParents =\n    boundary === 'clippingParents'\n      ? getClippingParents(element)\n      : [].concat(boundary);\n  const clippingParents = [...mainClippingParents, rootBoundary];\n  const firstClippingParent = clippingParents[0];\n\n  const clippingRect = clippingParents.reduce((accRect, clippingParent) => {\n    const rect = getClientRectFromMixedType(element, clippingParent);\n    const decorations = getDecorations(\n      isHTMLElement(clippingParent)\n        ? clippingParent\n        : getDocumentElement(element)\n    );\n\n    accRect.top = Math.max(rect.top + decorations.top, accRect.top);\n    accRect.right = Math.min(rect.right - decorations.right, accRect.right);\n    accRect.bottom = Math.min(rect.bottom - decorations.bottom, accRect.bottom);\n    accRect.left = Math.max(rect.left + decorations.left, accRect.left);\n\n    return accRect;\n  }, getClientRectFromMixedType(element, firstClippingParent));\n\n  clippingRect.width = clippingRect.right - clippingRect.left;\n  clippingRect.height = clippingRect.bottom - clippingRect.top;\n  clippingRect.x = clippingRect.left;\n  clippingRect.y = clippingRect.top;\n\n  return clippingRect;\n}\n","// @flow\nimport getWindow from './getWindow';\n\nexport default function getViewportRect(element: Element) {\n  const win = getWindow(element);\n\n  return {\n    width: win.innerWidth,\n    height: win.innerHeight,\n    x: 0,\n    y: 0,\n  };\n}\n","// @flow\nimport type { Rect } from '../types';\nimport getCompositeRect from './getCompositeRect';\nimport getWindow from './getWindow';\nimport getDocumentElement from './getDocumentElement';\nimport getWindowScroll from './getWindowScroll';\n\nexport default function getDocumentRect(element: HTMLElement): Rect {\n  const win = getWindow(element);\n  const winScroll = getWindowScroll(element);\n  const documentRect = getCompositeRect(getDocumentElement(element), win);\n\n  documentRect.height = Math.max(documentRect.height, win.innerHeight);\n  documentRect.width = Math.max(documentRect.width, win.innerWidth);\n  documentRect.x = -winScroll.scrollLeft;\n  documentRect.y = -winScroll.scrollTop;\n\n  return documentRect;\n}\n","// @flow\nimport type { SideObject } from '../types';\nimport getBorders from './getBorders';\nimport getNodeName from './getNodeName';\nimport getWindow from './getWindow';\nimport getWindowScrollBarX from './getWindowScrollBarX';\n\n// Borders + scrollbars\nexport default function getDecorations(element: HTMLElement): SideObject {\n  const win = getWindow(element);\n  const borders = getBorders(element);\n  const isHTML = getNodeName(element) === 'html';\n  const winScrollBarX = getWindowScrollBarX(element);\n\n  const x = element.clientWidth + borders.right;\n  let y = element.clientHeight + borders.bottom;\n\n  // HACK:\n  // document.documentElement.clientHeight on iOS reports the height of the\n  // viewport including the bottom bar, even if the bottom bar isn't visible.\n  // If the difference between window innerHeight and html clientHeight is more\n  // than 50, we assume it's a mobile bottom bar and ignore scrollbars.\n  // * A 50px thick scrollbar is likely non-existent (macOS is 15px and Windows\n  //   is about 17px)\n  // * The mobile bar is 114px tall\n  if (isHTML && win.innerHeight - element.clientHeight > 50) {\n    y = win.innerHeight - borders.bottom;\n  }\n\n  return {\n    top: isHTML ? 0 : element.clientTop,\n    right:\n      // RTL scrollbar (scrolling containers only)\n      element.clientLeft > borders.left\n        ? borders.right\n        : // LTR scrollbar\n        isHTML\n        ? win.innerWidth - x - winScrollBarX\n        : element.offsetWidth - x,\n    bottom: isHTML ? win.innerHeight - y : element.offsetHeight - y,\n    left: isHTML ? winScrollBarX : element.clientLeft,\n  };\n}\n","// @flow\nimport type { SideObject } from '../types';\nimport getComputedStyle from './getComputedStyle';\nimport { isHTMLElement } from './instanceOf';\n\nfunction toNumber(cssValue: string): number {\n  return parseFloat(cssValue) || 0;\n}\n\nexport default function getBorders(element: Element): SideObject {\n  const computedStyle = isHTMLElement(element) ? getComputedStyle(element) : {};\n\n  return {\n    top: toNumber(computedStyle.borderTopWidth),\n    right: toNumber(computedStyle.borderRightWidth),\n    bottom: toNumber(computedStyle.borderBottomWidth),\n    left: toNumber(computedStyle.borderLeftWidth),\n  };\n}\n","// @flow\nimport type { SideObject } from '../types';\nimport getFreshSideObject from './getFreshSideObject';\n\nexport default function mergePaddingObject(\n  paddingObject: $Shape<SideObject>\n): SideObject {\n  return {\n    ...getFreshSideObject(),\n    ...paddingObject,\n  };\n}\n","// @flow\nimport type { SideObject } from '../types';\n\nexport default function getFreshSideObject(): SideObject {\n  return {\n    top: 0,\n    right: 0,\n    bottom: 0,\n    left: 0,\n  };\n}\n","// @flow\n\nexport default function expandToHashMap<\n  T: number | string | boolean,\n  K: string\n>(value: T, keys: Array<K>): { [key: string]: T } {\n  return keys.reduce((hashMap, key) => {\n    hashMap[key] = value;\n    return hashMap;\n  }, {});\n}\n","// @flow\nimport type { State, SideObject, Padding } from '../types';\nimport type { Placement, Boundary, RootBoundary, Context } from '../enums';\nimport getBoundingClientRect from '../dom-utils/getBoundingClientRect';\nimport getClippingRect from '../dom-utils/getClippingRect';\nimport getDocumentElement from '../dom-utils/getDocumentElement';\nimport computeOffsets from './computeOffsets';\nimport rectToClientRect from './rectToClientRect';\nimport {\n  clippingParents,\n  reference,\n  popper,\n  bottom,\n  top,\n  right,\n  basePlacements,\n  viewport,\n} from '../enums';\nimport { isElement } from '../dom-utils/instanceOf';\nimport mergePaddingObject from './mergePaddingObject';\nimport expandToHashMap from './expandToHashMap';\n\ntype Options = {\n  placement: Placement,\n  boundary: Boundary,\n  rootBoundary: RootBoundary,\n  elementContext: Context,\n  altBoundary: boolean,\n  padding: Padding,\n};\n\nexport default function detectOverflow(\n  state: State,\n  options: $Shape<Options> = {}\n): SideObject {\n  const {\n    placement = state.placement,\n    boundary = clippingParents,\n    rootBoundary = viewport,\n    elementContext = popper,\n    altBoundary = false,\n    padding = 0,\n  } = options;\n\n  const paddingObject = mergePaddingObject(\n    typeof padding !== 'number'\n      ? padding\n      : expandToHashMap(padding, basePlacements)\n  );\n\n  const altContext = elementContext === popper ? reference : popper;\n\n  const referenceElement = state.elements.reference;\n  const popperRect = state.rects.popper;\n  const element = state.elements[altBoundary ? altContext : elementContext];\n\n  const clippingClientRect = getClippingRect(\n    isElement(element) ? element : getDocumentElement(state.elements.popper),\n    boundary,\n    rootBoundary\n  );\n\n  const referenceClientRect = getBoundingClientRect(referenceElement);\n\n  const popperOffsets = computeOffsets({\n    reference: referenceClientRect,\n    element: popperRect,\n    strategy: 'absolute',\n    placement,\n  });\n\n  const popperClientRect = rectToClientRect({\n    ...popperRect,\n    ...popperOffsets,\n  });\n\n  const elementClientRect =\n    elementContext === popper ? popperClientRect : referenceClientRect;\n\n  // positive = overflowing the clipping rect\n  // 0 or negative = within the clipping rect\n  const overflowOffsets = {\n    top: clippingClientRect.top - elementClientRect.top + paddingObject.top,\n    bottom:\n      elementClientRect.bottom -\n      clippingClientRect.bottom +\n      paddingObject.bottom,\n    left: clippingClientRect.left - elementClientRect.left + paddingObject.left,\n    right:\n      elementClientRect.right - clippingClientRect.right + paddingObject.right,\n  };\n\n  const offsetData = state.modifiersData.offset;\n\n  // Offsets can be applied only to the popper element\n  if (elementContext === popper && offsetData) {\n    const offset = offsetData[placement];\n\n    Object.keys(overflowOffsets).forEach(key => {\n      const multiply = [right, bottom].indexOf(key) >= 0 ? 1 : -1;\n      const axis = [top, bottom].indexOf(key) >= 0 ? 'y' : 'x';\n      overflowOffsets[key] += offset[axis] * multiply;\n    });\n  }\n\n  return overflowOffsets;\n}\n","// @flow\nimport type {\n  ModifierArguments,\n  Modifier,\n  Rect,\n  Options,\n  SideObject,\n  Offsets,\n} from '../types';\nimport { top, bottom, left, right } from '../enums';\nimport detectOverflow from '../utils/detectOverflow';\n\nfunction getSideOffsets(\n  overflow: SideObject,\n  rect: Rect,\n  preventedOffsets: Offsets = { x: 0, y: 0 }\n): SideObject {\n  return {\n    top: overflow.top - rect.height - preventedOffsets.y,\n    right: overflow.right - rect.width + preventedOffsets.x,\n    bottom: overflow.bottom - rect.height + preventedOffsets.y,\n    left: overflow.left - rect.width - preventedOffsets.x,\n  };\n}\n\nfunction isAnySideFullyClipped(overflow: SideObject): boolean {\n  return [top, right, bottom, left].some(side => overflow[side] >= 0);\n}\n\nfunction hide({ state, name }: ModifierArguments<Options>) {\n  const referenceRect = state.rects.reference;\n  const popperRect = state.rects.popper;\n  const preventedOffsets = state.modifiersData.preventOverflow;\n\n  const referenceOverflow = detectOverflow(state, {\n    elementContext: 'reference',\n  });\n  const popperAltOverflow = detectOverflow(state, {\n    altBoundary: true,\n  });\n\n  const referenceClippingOffsets = getSideOffsets(\n    referenceOverflow,\n    referenceRect\n  );\n  const popperEscapeOffsets = getSideOffsets(\n    popperAltOverflow,\n    popperRect,\n    preventedOffsets\n  );\n\n  const isReferenceHidden = isAnySideFullyClipped(referenceClippingOffsets);\n  const hasPopperEscaped = isAnySideFullyClipped(popperEscapeOffsets);\n\n  state.modifiersData[name] = {\n    referenceClippingOffsets,\n    popperEscapeOffsets,\n    isReferenceHidden,\n    hasPopperEscaped,\n  };\n\n  state.attributes.popper = {\n    ...state.attributes.popper,\n    'data-popper-reference-hidden': isReferenceHidden,\n    'data-popper-escaped': hasPopperEscaped,\n  };\n}\n\nexport default ({\n  name: 'hide',\n  enabled: true,\n  phase: 'main',\n  requiresIfExists: ['preventOverflow'],\n  fn: hide,\n}: Modifier<Options>);\n","// @flow\nimport type { ModifierArguments, Modifier } from '../types';\nimport getWindow from '../dom-utils/getWindow';\n\ntype Options = {\n  scroll: boolean,\n  resize: boolean,\n};\n\nconst passive = { passive: true };\n\nfunction effect({ state, instance, options }: ModifierArguments<Options>) {\n  const { scroll = true, resize = true } = options;\n\n  const window = getWindow(state.elements.popper);\n  const scrollParents = [\n    ...state.scrollParents.reference,\n    ...state.scrollParents.popper,\n  ];\n\n  if (scroll) {\n    scrollParents.forEach(scrollParent => {\n      scrollParent.addEventListener('scroll', instance.update, passive);\n    });\n  }\n\n  if (resize) {\n    window.addEventListener('resize', instance.update, passive);\n  }\n\n  return () => {\n    if (scroll) {\n      scrollParents.forEach(scrollParent => {\n        scrollParent.removeEventListener('scroll', instance.update, passive);\n      });\n    }\n\n    if (resize) {\n      window.removeEventListener('resize', instance.update, passive);\n    }\n  };\n}\n\nexport default ({\n  name: 'eventListeners',\n  enabled: true,\n  phase: 'write',\n  fn: () => {},\n  effect,\n  data: {},\n}: Modifier<Options>);\n","// @flow\nimport { popperGenerator } from './index';\nimport eventListeners from './modifiers/eventListeners';\nimport popperOffsets from './modifiers/popperOffsets';\nimport computeStyles from './modifiers/computeStyles';\nimport applyStyles from './modifiers/applyStyles';\nimport offset from './modifiers/offset';\nimport flip from './modifiers/flip';\nimport preventOverflow from './modifiers/preventOverflow';\nimport arrow from './modifiers/arrow';\nimport hide from './modifiers/hide';\n\nconst defaultModifiers = [\n  eventListeners,\n  popperOffsets,\n  computeStyles,\n  applyStyles,\n  offset,\n  flip,\n  preventOverflow,\n  arrow,\n  hide,\n];\n\nconst createPopper = popperGenerator({ defaultModifiers });\n\n// eslint-disable-next-line import/no-unused-modules\nexport { createPopper, popperGenerator, defaultModifiers };\n","// @flow\nimport type { ModifierArguments, Modifier } from '../types';\nimport computeOffsets from '../utils/computeOffsets';\n\nfunction popperOffsets({ state, name }: ModifierArguments<{||}>) {\n  // Offsets are the actual position the popper needs to have to be\n  // properly positioned near its reference element\n  // This is the most basic placement, and will be adjusted by\n  // the modifiers in the next step\n  state.modifiersData[name] = computeOffsets({\n    reference: state.rects.reference,\n    element: state.rects.popper,\n    strategy: 'absolute',\n    placement: state.placement,\n  });\n}\n\nexport default ({\n  name: 'popperOffsets',\n  enabled: true,\n  phase: 'read',\n  fn: popperOffsets,\n  data: {},\n}: Modifier<{||}>);\n","// @flow\nimport type { Modifier, ModifierArguments } from '../types';\nimport getNodeName from '../dom-utils/getNodeName';\nimport { isHTMLElement } from '../dom-utils/instanceOf';\n\n// This modifier takes the styles prepared by the `computeStyles` modifier\n// and applies them to the HTMLElements such as popper and arrow\n\nfunction applyStyles({ state }: ModifierArguments<{||}>) {\n  Object.keys(state.elements).forEach(name => {\n    const style = state.styles[name] || {};\n\n    const attributes = state.attributes[name] || {};\n    const element = state.elements[name];\n\n    // arrow is optional + virtual elements\n    if (!isHTMLElement(element) || !getNodeName(element)) {\n      return;\n    }\n\n    // Flow doesn't support to extend this property, but it's the most\n    // effective way to apply styles to an HTMLElement\n    // $FlowFixMe\n    Object.assign(element.style, style);\n\n    Object.keys(attributes).forEach(name => {\n      const value = attributes[name];\n      if (value === false) {\n        element.removeAttribute(name);\n      } else {\n        element.setAttribute(name, value === true ? '' : value);\n      }\n    });\n  });\n}\n\nfunction effect({ state }: ModifierArguments<{||}>) {\n  const initialStyles = {\n    popper: {\n      position: 'absolute',\n      left: '0',\n      top: '0',\n      margin: '0',\n    },\n    arrow: {\n      position: 'absolute',\n    },\n    reference: {},\n  };\n\n  Object.assign(state.elements.popper.style, initialStyles.popper);\n\n  if (state.elements.arrow) {\n    Object.assign(state.elements.arrow.style, initialStyles.arrow);\n  }\n\n  return () => {\n    Object.keys(state.elements).forEach(name => {\n      const element = state.elements[name];\n      const attributes = state.attributes[name] || {};\n\n      const styleProperties = Object.keys(\n        state.styles.hasOwnProperty(name)\n          ? state.styles[name]\n          : initialStyles[name]\n      );\n\n      // Set all values to an empty string to unset them\n      const style = styleProperties.reduce((style, property) => {\n        style[property] = '';\n        return style;\n      }, {});\n\n      // arrow is optional + virtual elements\n      if (!isHTMLElement(element) || !getNodeName(element)) {\n        return;\n      }\n\n      // Flow doesn't support to extend this property, but it's the most\n      // effective way to apply styles to an HTMLElement\n      // $FlowFixMe\n      Object.assign(element.style, style);\n\n      Object.keys(attributes).forEach(attribute => {\n        element.removeAttribute(attribute);\n      });\n    });\n  };\n}\n\nexport default ({\n  name: 'applyStyles',\n  enabled: true,\n  phase: 'write',\n  fn: applyStyles,\n  effect,\n  requires: ['computeStyles'],\n}: Modifier<{||}>);\n","// @flow\nimport type { Placement } from '../enums';\nimport type { ModifierArguments, Modifier, Rect, Offsets } from '../types';\nimport getBasePlacement from '../utils/getBasePlacement';\nimport { top, left, right, placements } from '../enums';\n\ntype OffsetsFunction = ({\n  popper: Rect,\n  reference: Rect,\n  placement: Placement,\n}) => [?number, ?number];\n\ntype Offset = OffsetsFunction | [?number, ?number];\n\ntype Options = {\n  offset: Offset,\n};\n\nexport function distanceAndSkiddingToXY(\n  placement: Placement,\n  rects: { popper: Rect, reference: Rect },\n  offset: Offset\n): Offsets {\n  const basePlacement = getBasePlacement(placement);\n  const invertDistance = [left, top].indexOf(basePlacement) >= 0 ? -1 : 1;\n\n  let [skidding, distance] =\n    typeof offset === 'function'\n      ? offset({\n          ...rects,\n          placement,\n        })\n      : offset;\n\n  skidding = skidding || 0;\n  distance = (distance || 0) * invertDistance;\n\n  return [left, right].indexOf(basePlacement) >= 0\n    ? { x: distance, y: skidding }\n    : { x: skidding, y: distance };\n}\n\nfunction offset({ state, options, name }: ModifierArguments<Options>) {\n  const { offset = [0, 0] } = options;\n\n  const data = placements.reduce((acc, placement) => {\n    acc[placement] = distanceAndSkiddingToXY(placement, state.rects, offset);\n    return acc;\n  }, {});\n\n  const { x, y } = data[state.placement];\n\n  state.modifiersData.popperOffsets.x += x;\n  state.modifiersData.popperOffsets.y += y;\n\n  state.modifiersData[name] = data;\n}\n\nexport default ({\n  name: 'offset',\n  enabled: true,\n  phase: 'main',\n  requires: ['popperOffsets'],\n  fn: offset,\n}: Modifier<Options>);\n","// @flow\nimport type { Placement, Boundary, RootBoundary } from '../enums';\nimport type { ModifierArguments, Modifier, Padding } from '../types';\nimport getOppositePlacement from '../utils/getOppositePlacement';\nimport getBasePlacement from '../utils/getBasePlacement';\nimport getOppositeVariationPlacement from '../utils/getOppositeVariationPlacement';\nimport detectOverflow from '../utils/detectOverflow';\nimport computeAutoPlacement from '../utils/computeAutoPlacement';\nimport { bottom, top, start, right, left, auto } from '../enums';\nimport getVariation from '../utils/getVariation';\n\ntype Options = {\n  fallbackPlacements: Array<Placement>,\n  padding: Padding,\n  boundary: Boundary,\n  rootBoundary: RootBoundary,\n  altBoundary: boolean,\n  flipVariations: boolean,\n};\n\nfunction getExpandedFallbackPlacements(placement: Placement): Array<Placement> {\n  if (getBasePlacement(placement) === auto) {\n    return [];\n  }\n\n  const oppositePlacement = getOppositePlacement(placement);\n\n  return [\n    getOppositeVariationPlacement(placement),\n    oppositePlacement,\n    getOppositeVariationPlacement(oppositePlacement),\n  ];\n}\n\nfunction flip({ state, options, name }: ModifierArguments<Options>) {\n  if (state.modifiersData[name]._skip) {\n    return;\n  }\n\n  const {\n    fallbackPlacements: specifiedFallbackPlacements,\n    padding,\n    boundary,\n    rootBoundary,\n    altBoundary,\n    flipVariations = true,\n  } = options;\n\n  const preferredPlacement = state.options.placement;\n  const basePlacement = getBasePlacement(preferredPlacement);\n  const isBasePlacement = basePlacement === preferredPlacement;\n\n  const fallbackPlacements =\n    specifiedFallbackPlacements ||\n    (isBasePlacement || !flipVariations\n      ? [getOppositePlacement(preferredPlacement)]\n      : getExpandedFallbackPlacements(preferredPlacement));\n\n  const placements = [preferredPlacement, ...fallbackPlacements].reduce(\n    (acc, placement) => {\n      return acc.concat(\n        getBasePlacement(placement) === auto\n          ? computeAutoPlacement(state, {\n              placement,\n              boundary,\n              rootBoundary,\n              padding,\n              flipVariations,\n            })\n          : placement\n      );\n    },\n    []\n  );\n\n  const referenceRect = state.rects.reference;\n  const popperRect = state.rects.popper;\n\n  const checksMap = new Map();\n  let makeFallbackChecks = true;\n  let firstFittingPlacement = placements[0];\n\n  for (let i = 0; i < placements.length; i++) {\n    const placement = placements[i];\n    const basePlacement = getBasePlacement(placement);\n    const isStartVariation = getVariation(placement) === start;\n    const isVertical = [top, bottom].indexOf(basePlacement) >= 0;\n    const len = isVertical ? 'width' : 'height';\n\n    const overflow = detectOverflow(state, {\n      placement,\n      boundary,\n      rootBoundary,\n      altBoundary,\n      padding,\n    });\n\n    let mainVariationSide: any = isVertical\n      ? isStartVariation\n        ? right\n        : left\n      : isStartVariation\n      ? bottom\n      : top;\n\n    if (referenceRect[len] > popperRect[len]) {\n      mainVariationSide = getOppositePlacement(mainVariationSide);\n    }\n\n    const altVariationSide: any = getOppositePlacement(mainVariationSide);\n\n    const checks = [\n      overflow[basePlacement] <= 0,\n      overflow[mainVariationSide] <= 0,\n      overflow[altVariationSide] <= 0,\n    ];\n\n    if (checks.every(check => check)) {\n      firstFittingPlacement = placement;\n      makeFallbackChecks = false;\n      break;\n    }\n\n    checksMap.set(placement, checks);\n  }\n\n  if (makeFallbackChecks) {\n    // `2` may be desired in some cases – research later\n    const numberOfChecks = flipVariations ? 3 : 1;\n\n    for (let i = numberOfChecks; i > 0; i--) {\n      const fittingPlacement = placements.find(placement => {\n        const checks = checksMap.get(placement);\n        if (checks) {\n          return checks.slice(0, i).every(check => check);\n        }\n      });\n\n      if (fittingPlacement) {\n        firstFittingPlacement = fittingPlacement;\n        break;\n      }\n    }\n  }\n\n  if (state.placement !== firstFittingPlacement) {\n    state.modifiersData[name]._skip = true;\n    state.placement = firstFittingPlacement;\n    state.reset = true;\n  }\n}\n\nexport default ({\n  name: 'flip',\n  enabled: true,\n  phase: 'main',\n  fn: flip,\n  requiresIfExists: ['offset'],\n  data: { _skip: false },\n}: Modifier<Options>);\n","// @flow\nimport type { State, Padding } from '../types';\nimport type {\n  Placement,\n  BasePlacement,\n  VariationPlacement,\n  Boundary,\n  RootBoundary,\n  ComputedPlacement,\n} from '../enums';\nimport getVariation from './getVariation';\nimport { variationPlacements, basePlacements } from '../enums';\nimport detectOverflow from './detectOverflow';\nimport getBasePlacement from './getBasePlacement';\n\ntype Options = {\n  placement: Placement,\n  padding: Padding,\n  boundary: Boundary,\n  rootBoundary: RootBoundary,\n  flipVariations: boolean,\n};\n\ntype OverflowsMap = {\n  [BasePlacement | VariationPlacement]: number,\n};\n\nexport default function computeAutoPlacement(\n  state: $Shape<State>,\n  options: Options = {}\n): Array<ComputedPlacement> {\n  const {\n    placement,\n    boundary,\n    rootBoundary,\n    padding,\n    flipVariations,\n  } = options;\n\n  const variation = getVariation(placement);\n\n  const placements = variation\n    ? flipVariations\n      ? variationPlacements\n      : variationPlacements.filter(\n          placement => getVariation(placement) === variation\n        )\n    : basePlacements;\n\n  // $FlowFixMe: Flow seems to have problems with two array unions...\n  const overflows: OverflowsMap = placements.reduce((acc, placement) => {\n    acc[placement] = detectOverflow(state, {\n      placement,\n      boundary,\n      rootBoundary,\n      padding,\n    })[getBasePlacement(placement)];\n\n    return acc;\n  }, {});\n\n  return Object.keys(overflows).sort((a, b) => overflows[a] - overflows[b]);\n}\n","// @flow\nimport { top, left, right, bottom, start } from '../enums';\nimport type { Placement, Boundary, RootBoundary } from '../enums';\nimport type { Rect, ModifierArguments, Modifier, Padding } from '../types';\nimport getBasePlacement from '../utils/getBasePlacement';\nimport getMainAxisFromPlacement from '../utils/getMainAxisFromPlacement';\nimport getAltAxis from '../utils/getAltAxis';\nimport within from '../utils/within';\nimport getLayoutRect from '../dom-utils/getLayoutRect';\nimport getOffsetParent from '../dom-utils/getOffsetParent';\nimport detectOverflow from '../utils/detectOverflow';\nimport getVariation from '../utils/getVariation';\nimport getFreshSideObject from '../utils/getFreshSideObject';\n\ntype TetherOffset =\n  | (({\n      popper: Rect,\n      reference: Rect,\n      placement: Placement,\n    }) => number)\n  | number;\n\ntype Options = {\n  /* Prevents boundaries overflow on the main axis */\n  mainAxis: boolean,\n  /* Prevents boundaries overflow on the alternate axis */\n  altAxis: boolean,\n  /* The area to check the popper is overflowing in */\n  boundary: Boundary,\n  /* If the popper is not overflowing the main area, fallback to this one */\n  rootBoundary: RootBoundary,\n  /* Use the reference's \"clippingParents\" boundary context */\n  altBoundary: boolean,\n  /**\n   * Allows the popper to overflow from its boundaries to keep it near its\n   * reference element\n   */\n  tether: boolean,\n  /* Offsets when the `tether` option should activate */\n  tetherOffset: TetherOffset,\n  /* Sets a padding to the provided boundary */\n  padding: Padding,\n};\n\nfunction preventOverflow({ state, options, name }: ModifierArguments<Options>) {\n  const {\n    mainAxis: checkMainAxis = true,\n    altAxis: checkAltAxis = false,\n    boundary,\n    rootBoundary,\n    altBoundary,\n    padding,\n    tether = true,\n    tetherOffset = 0,\n  } = options;\n\n  const overflow = detectOverflow(state, {\n    boundary,\n    rootBoundary,\n    padding,\n    altBoundary,\n  });\n  const basePlacement = getBasePlacement(state.placement);\n  const variation = getVariation(state.placement);\n  const isBasePlacement = !variation;\n  const mainAxis = getMainAxisFromPlacement(basePlacement);\n  const altAxis = getAltAxis(mainAxis);\n  const popperOffsets = state.modifiersData.popperOffsets;\n  const referenceRect = state.rects.reference;\n  const popperRect = state.rects.popper;\n  const tetherOffsetValue =\n    typeof tetherOffset === 'function'\n      ? tetherOffset({\n          ...state.rects,\n          placement: state.placement,\n        })\n      : tetherOffset;\n\n  const data = { x: 0, y: 0 };\n\n  if (checkMainAxis) {\n    const mainSide = mainAxis === 'y' ? top : left;\n    const altSide = mainAxis === 'y' ? bottom : right;\n    const len = mainAxis === 'y' ? 'height' : 'width';\n    const offset = popperOffsets[mainAxis];\n\n    const min = popperOffsets[mainAxis] + overflow[mainSide];\n    const max = popperOffsets[mainAxis] - overflow[altSide];\n\n    const additive = tether ? -popperRect[len] / 2 : 0;\n\n    const minLen = variation === start ? referenceRect[len] : popperRect[len];\n    const maxLen = variation === start ? -popperRect[len] : -referenceRect[len];\n\n    // We need to include the arrow in the calculation so the arrow doesn't go\n    // outside the reference bounds\n    const arrowElement = state.elements.arrow;\n    const arrowRect =\n      tether && arrowElement\n        ? getLayoutRect(arrowElement)\n        : { width: 0, height: 0 };\n    const arrowPaddingObject = state.modifiersData['arrow#persistent']\n      ? state.modifiersData['arrow#persistent'].padding\n      : getFreshSideObject();\n    const arrowPaddingMin = arrowPaddingObject[mainSide];\n    const arrowPaddingMax = arrowPaddingObject[altSide];\n\n    // If the reference length is smaller than the arrow length, we don't want\n    // to include its full size in the calculation. If the reference is small\n    // and near the edge of a boundary, the popper can overflow even if the\n    // reference is not overflowing as well (e.g. virtual elements with no\n    // width or height)\n    const arrowLen = within(0, referenceRect[len], arrowRect[len]);\n\n    const minOffset = isBasePlacement\n      ? referenceRect[len] / 2 -\n        additive -\n        arrowLen -\n        arrowPaddingMin -\n        tetherOffsetValue\n      : minLen - arrowLen - arrowPaddingMin - tetherOffsetValue;\n    const maxOffset = isBasePlacement\n      ? -referenceRect[len] / 2 +\n        additive +\n        arrowLen +\n        arrowPaddingMax +\n        tetherOffsetValue\n      : maxLen + arrowLen + arrowPaddingMax + tetherOffsetValue;\n\n    const arrowOffsetParent =\n      state.elements.arrow && getOffsetParent(state.elements.arrow);\n    const clientOffset = arrowOffsetParent\n      ? mainAxis === 'y'\n        ? arrowOffsetParent.clientTop || 0\n        : arrowOffsetParent.clientLeft || 0\n      : 0;\n\n    const offsetModifierValue = state.modifiersData.offset\n      ? state.modifiersData.offset[state.placement][mainAxis]\n      : 0;\n\n    const tetherMin =\n      popperOffsets[mainAxis] + minOffset - offsetModifierValue - clientOffset;\n    const tetherMax = popperOffsets[mainAxis] + maxOffset - offsetModifierValue;\n\n    const preventedOffset = within(\n      tether ? Math.min(min, tetherMin) : min,\n      offset,\n      tether ? Math.max(max, tetherMax) : max\n    );\n\n    popperOffsets[mainAxis] = preventedOffset;\n    data[mainAxis] = preventedOffset - offset;\n  }\n\n  if (checkAltAxis) {\n    const mainSide = mainAxis === 'x' ? top : left;\n    const altSide = mainAxis === 'x' ? bottom : right;\n    const offset = popperOffsets[altAxis];\n\n    const min = offset + overflow[mainSide];\n    const max = offset - overflow[altSide];\n\n    const preventedOffset = within(min, offset, max);\n\n    state.modifiersData.popperOffsets[altAxis] = preventedOffset;\n    data[altAxis] = preventedOffset - offset;\n  }\n\n  state.modifiersData[name] = data;\n}\n\nexport default ({\n  name: 'preventOverflow',\n  enabled: true,\n  phase: 'main',\n  fn: preventOverflow,\n  requiresIfExists: ['offset'],\n}: Modifier<Options>);\n","// @flow\n\nexport default function getAltAxis(axis: 'x' | 'y'): 'x' | 'y' {\n  return axis === 'x' ? 'y' : 'x';\n}\n","// @flow\n\nexport default function within(\n  min: number,\n  value: number,\n  max: number\n): number {\n  return Math.max(min, Math.min(value, max));\n}\n","// @flow\nimport type { Modifier, ModifierArguments, Padding } from '../types';\nimport getBasePlacement from '../utils/getBasePlacement';\nimport getLayoutRect from '../dom-utils/getLayoutRect';\nimport contains from '../dom-utils/contains';\nimport getOffsetParent from '../dom-utils/getOffsetParent';\nimport getMainAxisFromPlacement from '../utils/getMainAxisFromPlacement';\nimport within from '../utils/within';\nimport mergePaddingObject from '../utils/mergePaddingObject';\nimport expandToHashMap from '../utils/expandToHashMap';\nimport { left, right, basePlacements, top, bottom } from '../enums';\n\ntype Options = {\n  element: HTMLElement | string,\n  padding: Padding,\n};\n\nfunction arrow({ state, name }: ModifierArguments<Options>) {\n  const arrowElement = state.elements.arrow;\n  const popperOffsets = state.modifiersData.popperOffsets;\n  const basePlacement = getBasePlacement(state.placement);\n  const axis = getMainAxisFromPlacement(basePlacement);\n  const isVertical = [left, right].indexOf(basePlacement) >= 0;\n  const len = isVertical ? 'height' : 'width';\n\n  if (!arrowElement) {\n    return;\n  }\n\n  const paddingObject = state.modifiersData[`${name}#persistent`].padding;\n  const arrowRect = getLayoutRect(arrowElement);\n  const minProp = axis === 'y' ? top : left;\n  const maxProp = axis === 'y' ? bottom : right;\n\n  const endDiff =\n    state.rects.reference[len] +\n    state.rects.reference[axis] -\n    popperOffsets[axis] -\n    state.rects.popper[len];\n  const startDiff = popperOffsets[axis] - state.rects.reference[axis];\n\n  const arrowOffsetParent =\n    state.elements.arrow && getOffsetParent(state.elements.arrow);\n  const clientOffset = arrowOffsetParent\n    ? axis === 'y'\n      ? arrowOffsetParent.clientLeft || 0\n      : arrowOffsetParent.clientTop || 0\n    : 0;\n\n  const centerToReference = endDiff / 2 - startDiff / 2 - clientOffset;\n\n  // Make sure the arrow doesn't overflow the popper if the center point is\n  // outside of the popper bounds\n  const center = within(\n    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+{"version":3,"file":"popper.min.js","sources":["../../src/utils/isFunction.js","../../src/utils/getStyleComputedProperty.js","../../src/utils/getParentNode.js","../../src/utils/getScrollParent.js","../../src/utils/getReferenceNode.js","../../src/utils/isIE.js","../../src/utils/getOffsetParent.js","../../src/utils/isOffsetContainer.js","../../src/utils/getRoot.js","../../src/utils/findCommonOffsetParent.js","../../src/utils/getScroll.js","../../src/utils/includeScroll.js","../../src/utils/getBordersSize.js","../../src/utils/getWindowSizes.js","../../src/utils/getClientRect.js","../../src/utils/getBoundingClientRect.js","../../src/utils/getOffsetRectRelativeToArbitraryNode.js","../../src/utils/getViewportOffsetRectRelativeToArtbitraryNode.js","../../src/utils/isFixed.js","../../src/utils/getFixedPositionOffsetParent.js","../../src/utils/getBoundaries.js","../../src/utils/computeAutoPlacement.js","../../src/utils/getReferenceOffsets.js","../../src/utils/getOuterSizes.js","../../src/utils/getOppositePlacement.js","../../src/utils/getPopperOffsets.js","../../src/utils/find.js","../../src/utils/findIndex.js","../../src/utils/runModifiers.js","../../src/methods/update.js","../../src/utils/isModifierEnabled.js","../../src/utils/getSupportedPropertyName.js","../../src/methods/destroy.js","../../src/utils/getWindow.js","../../src/utils/setupEventListeners.js","../../src/methods/enableEventListeners.js","../../src/utils/removeEventListeners.js","../../src/methods/disableEventListeners.js","../../src/utils/isNumeric.js","../../src/utils/setStyles.js","../../src/utils/setAttributes.js","../../src/utils/getRoundedOffsets.js","../../src/utils/isModifierRequired.js","../../src/utils/getOppositeVariation.js","../../src/utils/clockwise.js","../../src/modifiers/offset.js","../../src/modifiers/arrow.js","../../src/utils/isBrowser.js","../../src/utils/debounce.js","../../src/modifiers/computeStyle.js","../../src/modifiers/flip.js","../../src/index.js","../../src/methods/defaults.js","../../src/modifiers/index.js","../../src/modifiers/shift.js","../../src/modifiers/preventOverflow.js","../../src/modifiers/keepTogether.js","../../src/modifiers/inner.js","../../src/modifiers/hide.js","../../src/modifiers/applyStyle.js"],"sourcesContent":["/**\n * Check if the given variable is a function\n * @method\n * @memberof Popper.Utils\n * @argument {Any} functionToCheck - variable to check\n * @returns {Boolean} answer to: is a function?\n */\nexport default function isFunction(functionToCheck) {\n  const getType = {};\n  return (\n    functionToCheck &&\n    getType.toString.call(functionToCheck) === '[object Function]'\n  );\n}\n","/**\n * Get CSS computed property of the given element\n * @method\n * @memberof Popper.Utils\n * @argument {Eement} element\n * @argument {String} property\n */\nexport default function getStyleComputedProperty(element, property) {\n  if (element.nodeType !== 1) {\n    return [];\n  }\n  // NOTE: 1 DOM access here\n  const window = element.ownerDocument.defaultView;\n  const css = window.getComputedStyle(element, null);\n  return property ? css[property] : css;\n}\n","/**\n * Returns the parentNode or the host of the element\n * @method\n * @memberof Popper.Utils\n * @argument {Element} element\n * @returns {Element} parent\n */\nexport default function getParentNode(element) {\n  if (element.nodeName === 'HTML') {\n    return element;\n  }\n  return element.parentNode || element.host;\n}\n","import getStyleComputedProperty from './getStyleComputedProperty';\nimport getParentNode from './getParentNode';\n\n/**\n * Returns the scrolling parent of the given element\n * @method\n * @memberof Popper.Utils\n * @argument {Element} element\n * @returns {Element} scroll parent\n */\nexport default function getScrollParent(element) {\n  // Return body, `getScroll` will take care to get the correct `scrollTop` from it\n  if (!element) {\n    return document.body\n  }\n\n  switch (element.nodeName) {\n    case 'HTML':\n    case 'BODY':\n      return element.ownerDocument.body\n    case '#document':\n      return element.body\n  }\n\n  // Firefox want us to check `-x` and `-y` variations as well\n  const { overflow, overflowX, overflowY } = getStyleComputedProperty(element);\n  if (/(auto|scroll|overlay)/.test(overflow + overflowY + overflowX)) {\n    return element;\n  }\n\n  return getScrollParent(getParentNode(element));\n}\n","/**\n * Returns the reference node of the reference object, or the reference object itself.\n * @method\n * @memberof Popper.Utils\n * @param {Element|Object} reference - the reference element (the popper will be relative to this)\n * @returns {Element} parent\n */\nexport default function getReferenceNode(reference) {\n  return reference && reference.referenceNode ? reference.referenceNode : reference;\n}\n","import isBrowser from './isBrowser';\n\nconst isIE11 = isBrowser && !!(window.MSInputMethodContext && document.documentMode);\nconst isIE10 = isBrowser && /MSIE 10/.test(navigator.userAgent);\n\n/**\n * Determines if the browser is Internet Explorer\n * @method\n * @memberof Popper.Utils\n * @param {Number} version to check\n * @returns {Boolean} isIE\n */\nexport default function isIE(version) {\n  if (version === 11) {\n    return isIE11;\n  }\n  if (version === 10) {\n    return isIE10;\n  }\n  return isIE11 || isIE10;\n}\n","import getStyleComputedProperty from './getStyleComputedProperty';\nimport isIE from './isIE';\n/**\n * Returns the offset parent of the given element\n * @method\n * @memberof Popper.Utils\n * @argument {Element} element\n * @returns {Element} offset parent\n */\nexport default function getOffsetParent(element) {\n  if (!element) {\n    return document.documentElement;\n  }\n\n  const noOffsetParent = isIE(10) ? document.body : null;\n\n  // NOTE: 1 DOM access here\n  let offsetParent = element.offsetParent || null;\n  // Skip hidden elements which don't have an offsetParent\n  while (offsetParent === noOffsetParent && element.nextElementSibling) {\n    offsetParent = (element = element.nextElementSibling).offsetParent;\n  }\n\n  const nodeName = offsetParent && offsetParent.nodeName;\n\n  if (!nodeName || nodeName === 'BODY' || nodeName === 'HTML') {\n    return element ? element.ownerDocument.documentElement : document.documentElement;\n  }\n\n  // .offsetParent will return the closest TH, TD or TABLE in case\n  // no offsetParent is present, I hate this job...\n  if (\n    ['TH', 'TD', 'TABLE'].indexOf(offsetParent.nodeName) !== -1 &&\n    getStyleComputedProperty(offsetParent, 'position') === 'static'\n  ) {\n    return getOffsetParent(offsetParent);\n  }\n\n  return offsetParent;\n}\n","import getOffsetParent from './getOffsetParent';\n\nexport default function isOffsetContainer(element) {\n  const { nodeName } = element;\n  if (nodeName === 'BODY') {\n    return false;\n  }\n  return (\n    nodeName === 'HTML' || getOffsetParent(element.firstElementChild) === element\n  );\n}\n","/**\n * Finds the root node (document, shadowDOM root) of the given element\n * @method\n * @memberof Popper.Utils\n * @argument {Element} node\n * @returns {Element} root node\n */\nexport default function getRoot(node) {\n  if (node.parentNode !== null) {\n    return getRoot(node.parentNode);\n  }\n\n  return node;\n}\n","import isOffsetContainer from './isOffsetContainer';\nimport getRoot from './getRoot';\nimport getOffsetParent from './getOffsetParent';\n\n/**\n * Finds the offset parent common to the two provided nodes\n * @method\n * @memberof Popper.Utils\n * @argument {Element} element1\n * @argument {Element} element2\n * @returns {Element} common offset parent\n */\nexport default function findCommonOffsetParent(element1, element2) {\n  // This check is needed to avoid errors in case one of the elements isn't defined for any reason\n  if (!element1 || !element1.nodeType || !element2 || !element2.nodeType) {\n    return document.documentElement;\n  }\n\n  // Here we make sure to give as \"start\" the element that comes first in the DOM\n  const order =\n    element1.compareDocumentPosition(element2) &\n    Node.DOCUMENT_POSITION_FOLLOWING;\n  const start = order ? element1 : element2;\n  const end = order ? element2 : element1;\n\n  // Get common ancestor container\n  const range = document.createRange();\n  range.setStart(start, 0);\n  range.setEnd(end, 0);\n  const { commonAncestorContainer } = range;\n\n  // Both nodes are inside #document\n  if (\n    (element1 !== commonAncestorContainer &&\n      element2 !== commonAncestorContainer) ||\n    start.contains(end)\n  ) {\n    if (isOffsetContainer(commonAncestorContainer)) {\n      return commonAncestorContainer;\n    }\n\n    return getOffsetParent(commonAncestorContainer);\n  }\n\n  // one of the nodes is inside shadowDOM, find which one\n  const element1root = getRoot(element1);\n  if (element1root.host) {\n    return findCommonOffsetParent(element1root.host, element2);\n  } else {\n    return findCommonOffsetParent(element1, getRoot(element2).host);\n  }\n}\n","/**\n * Gets the scroll value of the given element in the given side (top and left)\n * @method\n * @memberof Popper.Utils\n * @argument {Element} element\n * @argument {String} side `top` or `left`\n * @returns {number} amount of scrolled pixels\n */\nexport default function getScroll(element, side = 'top') {\n  const upperSide = side === 'top' ? 'scrollTop' : 'scrollLeft';\n  const nodeName = element.nodeName;\n\n  if (nodeName === 'BODY' || nodeName === 'HTML') {\n    const html = element.ownerDocument.documentElement;\n    const scrollingElement = element.ownerDocument.scrollingElement || html;\n    return scrollingElement[upperSide];\n  }\n\n  return element[upperSide];\n}\n","import getScroll from './getScroll';\n\n/*\n * Sum or subtract the element scroll values (left and top) from a given rect object\n * @method\n * @memberof Popper.Utils\n * @param {Object} rect - Rect object you want to change\n * @param {HTMLElement} element - The element from the function reads the scroll values\n * @param {Boolean} subtract - set to true if you want to subtract the scroll values\n * @return {Object} rect - The modifier rect object\n */\nexport default function includeScroll(rect, element, subtract = false) {\n  const scrollTop = getScroll(element, 'top');\n  const scrollLeft = getScroll(element, 'left');\n  const modifier = subtract ? -1 : 1;\n  rect.top += scrollTop * modifier;\n  rect.bottom += scrollTop * modifier;\n  rect.left += scrollLeft * modifier;\n  rect.right += scrollLeft * modifier;\n  return rect;\n}\n","/*\n * Helper to detect borders of a given element\n * @method\n * @memberof Popper.Utils\n * @param {CSSStyleDeclaration} styles\n * Result of `getStyleComputedProperty` on the given element\n * @param {String} axis - `x` or `y`\n * @return {number} borders - The borders size of the given axis\n */\n\nexport default function getBordersSize(styles, axis) {\n  const sideA = axis === 'x' ? 'Left' : 'Top';\n  const sideB = sideA === 'Left' ? 'Right' : 'Bottom';\n\n  return (\n    parseFloat(styles[`border${sideA}Width`], 10) +\n    parseFloat(styles[`border${sideB}Width`], 10)\n  );\n}\n","import isIE from './isIE';\n\nfunction getSize(axis, body, html, computedStyle) {\n  return Math.max(\n    body[`offset${axis}`],\n    body[`scroll${axis}`],\n    html[`client${axis}`],\n    html[`offset${axis}`],\n    html[`scroll${axis}`],\n    isIE(10)\n      ? (parseInt(html[`offset${axis}`]) + \n      parseInt(computedStyle[`margin${axis === 'Height' ? 'Top' : 'Left'}`]) + \n      parseInt(computedStyle[`margin${axis === 'Height' ? 'Bottom' : 'Right'}`]))\n    : 0 \n  );\n}\n\nexport default function getWindowSizes(document) {\n  const body = document.body;\n  const html = document.documentElement;\n  const computedStyle = isIE(10) && getComputedStyle(html);\n\n  return {\n    height: getSize('Height', body, html, computedStyle),\n    width: getSize('Width', body, html, computedStyle),\n  };\n}\n","/**\n * Given element offsets, generate an output similar to getBoundingClientRect\n * @method\n * @memberof Popper.Utils\n * @argument {Object} offsets\n * @returns {Object} ClientRect like output\n */\nexport default function getClientRect(offsets) {\n  return {\n    ...offsets,\n    right: offsets.left + offsets.width,\n    bottom: offsets.top + offsets.height,\n  };\n}\n","import getStyleComputedProperty from './getStyleComputedProperty';\nimport getBordersSize from './getBordersSize';\nimport getWindowSizes from './getWindowSizes';\nimport getScroll from './getScroll';\nimport getClientRect from './getClientRect';\nimport isIE from './isIE';\n\n/**\n * Get bounding client rect of given element\n * @method\n * @memberof Popper.Utils\n * @param {HTMLElement} element\n * @return {Object} client rect\n */\nexport default function getBoundingClientRect(element) {\n  let rect = {};\n\n  // IE10 10 FIX: Please, don't ask, the element isn't\n  // considered in DOM in some circumstances...\n  // This isn't reproducible in IE10 compatibility mode of IE11\n  try {\n    if (isIE(10)) {\n      rect = element.getBoundingClientRect();\n      const scrollTop = getScroll(element, 'top');\n      const scrollLeft = getScroll(element, 'left');\n      rect.top += scrollTop;\n      rect.left += scrollLeft;\n      rect.bottom += scrollTop;\n      rect.right += scrollLeft;\n    }\n    else {\n      rect = element.getBoundingClientRect();\n    }\n  }\n  catch(e){}\n\n  const result = {\n    left: rect.left,\n    top: rect.top,\n    width: rect.right - rect.left,\n    height: rect.bottom - rect.top,\n  };\n\n  // subtract scrollbar size from sizes\n  const sizes = element.nodeName === 'HTML' ? getWindowSizes(element.ownerDocument) : {};\n  const width =\n    sizes.width || element.clientWidth || result.width;\n  const height =\n    sizes.height || element.clientHeight || result.height;\n\n  let horizScrollbar = element.offsetWidth - width;\n  let vertScrollbar = element.offsetHeight - height;\n\n  // if an hypothetical scrollbar is detected, we must be sure it's not a `border`\n  // we make this check conditional for performance reasons\n  if (horizScrollbar || vertScrollbar) {\n    const styles = getStyleComputedProperty(element);\n    horizScrollbar -= getBordersSize(styles, 'x');\n    vertScrollbar -= getBordersSize(styles, 'y');\n\n    result.width -= horizScrollbar;\n    result.height -= vertScrollbar;\n  }\n\n  return getClientRect(result);\n}\n","import getStyleComputedProperty from './getStyleComputedProperty';\nimport includeScroll from './includeScroll';\nimport getScrollParent from './getScrollParent';\nimport getBoundingClientRect from './getBoundingClientRect';\nimport runIsIE from './isIE';\nimport getClientRect from './getClientRect';\n\nexport default function getOffsetRectRelativeToArbitraryNode(children, parent, fixedPosition = false) {\n  const isIE10 = runIsIE(10);\n  const isHTML = parent.nodeName === 'HTML';\n  const childrenRect = getBoundingClientRect(children);\n  const parentRect = getBoundingClientRect(parent);\n  const scrollParent = getScrollParent(children);\n\n  const styles = getStyleComputedProperty(parent);\n  const borderTopWidth = parseFloat(styles.borderTopWidth, 10);\n  const borderLeftWidth = parseFloat(styles.borderLeftWidth, 10);\n\n  // In cases where the parent is fixed, we must ignore negative scroll in offset calc\n  if(fixedPosition && isHTML) {\n    parentRect.top = Math.max(parentRect.top, 0);\n    parentRect.left = Math.max(parentRect.left, 0);\n  }\n  let offsets = getClientRect({\n    top: childrenRect.top - parentRect.top - borderTopWidth,\n    left: childrenRect.left - parentRect.left - borderLeftWidth,\n    width: childrenRect.width,\n    height: childrenRect.height,\n  });\n  offsets.marginTop = 0;\n  offsets.marginLeft = 0;\n\n  // Subtract margins of documentElement in case it's being used as parent\n  // we do this only on HTML because it's the only element that behaves\n  // differently when margins are applied to it. The margins are included in\n  // the box of the documentElement, in the other cases not.\n  if (!isIE10 && isHTML) {\n    const marginTop = parseFloat(styles.marginTop, 10);\n    const marginLeft = parseFloat(styles.marginLeft, 10);\n\n    offsets.top -= borderTopWidth - marginTop;\n    offsets.bottom -= borderTopWidth - marginTop;\n    offsets.left -= borderLeftWidth - marginLeft;\n    offsets.right -= borderLeftWidth - marginLeft;\n\n    // Attach marginTop and marginLeft because in some circumstances we may need them\n    offsets.marginTop = marginTop;\n    offsets.marginLeft = marginLeft;\n  }\n\n  if (\n    isIE10 && !fixedPosition\n      ? parent.contains(scrollParent)\n      : parent === scrollParent && scrollParent.nodeName !== 'BODY'\n  ) {\n    offsets = includeScroll(offsets, parent);\n  }\n\n  return offsets;\n}\n","import getOffsetRectRelativeToArbitraryNode from './getOffsetRectRelativeToArbitraryNode';\nimport getScroll from './getScroll';\nimport getClientRect from './getClientRect';\n\nexport default function getViewportOffsetRectRelativeToArtbitraryNode(element, excludeScroll = false) {\n  const html = element.ownerDocument.documentElement;\n  const relativeOffset = getOffsetRectRelativeToArbitraryNode(element, html);\n  const width = Math.max(html.clientWidth, window.innerWidth || 0);\n  const height = Math.max(html.clientHeight, window.innerHeight || 0);\n\n  const scrollTop = !excludeScroll ? getScroll(html) : 0;\n  const scrollLeft = !excludeScroll ? getScroll(html, 'left') : 0;\n\n  const offset = {\n    top: scrollTop - relativeOffset.top + relativeOffset.marginTop,\n    left: scrollLeft - relativeOffset.left + relativeOffset.marginLeft,\n    width,\n    height,\n  };\n\n  return getClientRect(offset);\n}\n","import getStyleComputedProperty from './getStyleComputedProperty';\nimport getParentNode from './getParentNode';\n\n/**\n * Check if the given element is fixed or is inside a fixed parent\n * @method\n * @memberof Popper.Utils\n * @argument {Element} element\n * @argument {Element} customContainer\n * @returns {Boolean} answer to \"isFixed?\"\n */\nexport default function isFixed(element) {\n  const nodeName = element.nodeName;\n  if (nodeName === 'BODY' || nodeName === 'HTML') {\n    return false;\n  }\n  if (getStyleComputedProperty(element, 'position') === 'fixed') {\n    return true;\n  }\n  const parentNode = getParentNode(element);\n  if (!parentNode) {\n    return false;\n  }\n  return isFixed(parentNode);\n}\n","import getStyleComputedProperty from './getStyleComputedProperty';\nimport isIE from './isIE';\n/**\n * Finds the first parent of an element that has a transformed property defined\n * @method\n * @memberof Popper.Utils\n * @argument {Element} element\n * @returns {Element} first transformed parent or documentElement\n */\n\nexport default function getFixedPositionOffsetParent(element) {\n  // This check is needed to avoid errors in case one of the elements isn't defined for any reason\n   if (!element || !element.parentElement || isIE()) {\n    return document.documentElement;\n  }\n  let el = element.parentElement;\n  while (el && getStyleComputedProperty(el, 'transform') === 'none') {\n    el = el.parentElement;\n  }\n  return el || document.documentElement;\n\n}\n","import getScrollParent from './getScrollParent';\nimport getParentNode from './getParentNode';\nimport getReferenceNode from './getReferenceNode';\nimport findCommonOffsetParent from './findCommonOffsetParent';\nimport getOffsetRectRelativeToArbitraryNode from './getOffsetRectRelativeToArbitraryNode';\nimport getViewportOffsetRectRelativeToArtbitraryNode from './getViewportOffsetRectRelativeToArtbitraryNode';\nimport getWindowSizes from './getWindowSizes';\nimport isFixed from './isFixed';\nimport getFixedPositionOffsetParent from './getFixedPositionOffsetParent';\n\n/**\n * Computed the boundaries limits and return them\n * @method\n * @memberof Popper.Utils\n * @param {HTMLElement} popper\n * @param {HTMLElement} reference\n * @param {number} padding\n * @param {HTMLElement} boundariesElement - Element used to define the boundaries\n * @param {Boolean} fixedPosition - Is in fixed position mode\n * @returns {Object} Coordinates of the boundaries\n */\nexport default function getBoundaries(\n  popper,\n  reference,\n  padding,\n  boundariesElement,\n  fixedPosition = false\n) {\n  // NOTE: 1 DOM access here\n\n  let boundaries = { top: 0, left: 0 };\n  const offsetParent = fixedPosition ? getFixedPositionOffsetParent(popper) : findCommonOffsetParent(popper, getReferenceNode(reference));\n\n  // Handle viewport case\n  if (boundariesElement === 'viewport' ) {\n    boundaries = getViewportOffsetRectRelativeToArtbitraryNode(offsetParent, fixedPosition);\n  }\n\n  else {\n    // Handle other cases based on DOM element used as boundaries\n    let boundariesNode;\n    if (boundariesElement === 'scrollParent') {\n      boundariesNode = getScrollParent(getParentNode(reference));\n      if (boundariesNode.nodeName === 'BODY') {\n        boundariesNode = popper.ownerDocument.documentElement;\n      }\n    } else if (boundariesElement === 'window') {\n      boundariesNode = popper.ownerDocument.documentElement;\n    } else {\n      boundariesNode = boundariesElement;\n    }\n\n    const offsets = getOffsetRectRelativeToArbitraryNode(\n      boundariesNode,\n      offsetParent,\n      fixedPosition\n    );\n\n    // In case of HTML, we need a different computation\n    if (boundariesNode.nodeName === 'HTML' && !isFixed(offsetParent)) {\n      const { height, width } = getWindowSizes(popper.ownerDocument);\n      boundaries.top += offsets.top - offsets.marginTop;\n      boundaries.bottom = height + offsets.top;\n      boundaries.left += offsets.left - offsets.marginLeft;\n      boundaries.right = width + offsets.left;\n    } else {\n      // for all the other DOM elements, this one is good\n      boundaries = offsets;\n    }\n  }\n\n  // Add paddings\n  padding = padding || 0;\n  const isPaddingNumber = typeof padding === 'number';\n  boundaries.left += isPaddingNumber ? padding : padding.left || 0; \n  boundaries.top += isPaddingNumber ? padding : padding.top || 0; \n  boundaries.right -= isPaddingNumber ? padding : padding.right || 0; \n  boundaries.bottom -= isPaddingNumber ? padding : padding.bottom || 0; \n\n  return boundaries;\n}\n","import getBoundaries from '../utils/getBoundaries';\n\nfunction getArea({ width, height }) {\n  return width * height;\n}\n\n/**\n * Utility used to transform the `auto` placement to the placement with more\n * available space.\n * @method\n * @memberof Popper.Utils\n * @argument {Object} data - The data object generated by update method\n * @argument {Object} options - Modifiers configuration and options\n * @returns {Object} The data object, properly modified\n */\nexport default function computeAutoPlacement(\n  placement,\n  refRect,\n  popper,\n  reference,\n  boundariesElement,\n  padding = 0\n) {\n  if (placement.indexOf('auto') === -1) {\n    return placement;\n  }\n\n  const boundaries = getBoundaries(\n    popper,\n    reference,\n    padding,\n    boundariesElement\n  );\n\n  const rects = {\n    top: {\n      width: boundaries.width,\n      height: refRect.top - boundaries.top,\n    },\n    right: {\n      width: boundaries.right - refRect.right,\n      height: boundaries.height,\n    },\n    bottom: {\n      width: boundaries.width,\n      height: boundaries.bottom - refRect.bottom,\n    },\n    left: {\n      width: refRect.left - boundaries.left,\n      height: boundaries.height,\n    },\n  };\n\n  const sortedAreas = Object.keys(rects)\n    .map(key => ({\n      key,\n      ...rects[key],\n      area: getArea(rects[key]),\n    }))\n    .sort((a, b) => b.area - a.area);\n\n  const filteredAreas = sortedAreas.filter(\n    ({ width, height }) =>\n      width >= popper.clientWidth && height >= popper.clientHeight\n  );\n\n  const computedPlacement = filteredAreas.length > 0\n    ? filteredAreas[0].key\n    : sortedAreas[0].key;\n\n  const variation = placement.split('-')[1];\n\n  return computedPlacement + (variation ? `-${variation}` : '');\n}\n","import findCommonOffsetParent from './findCommonOffsetParent';\nimport getOffsetRectRelativeToArbitraryNode from './getOffsetRectRelativeToArbitraryNode';\nimport getFixedPositionOffsetParent from './getFixedPositionOffsetParent';\nimport getReferenceNode from './getReferenceNode';\n\n/**\n * Get offsets to the reference element\n * @method\n * @memberof Popper.Utils\n * @param {Object} state\n * @param {Element} popper - the popper element\n * @param {Element} reference - the reference element (the popper will be relative to this)\n * @param {Element} fixedPosition - is in fixed position mode\n * @returns {Object} An object containing the offsets which will be applied to the popper\n */\nexport default function getReferenceOffsets(state, popper, reference, fixedPosition = null) {\n  const commonOffsetParent = fixedPosition ? getFixedPositionOffsetParent(popper) : findCommonOffsetParent(popper, getReferenceNode(reference));\n  return getOffsetRectRelativeToArbitraryNode(reference, commonOffsetParent, fixedPosition);\n}\n","/**\n * Get the outer sizes of the given element (offset size + margins)\n * @method\n * @memberof Popper.Utils\n * @argument {Element} element\n * @returns {Object} object containing width and height properties\n */\nexport default function getOuterSizes(element) {\n  const window = element.ownerDocument.defaultView;\n  const styles = window.getComputedStyle(element);\n  const x = parseFloat(styles.marginTop || 0) + parseFloat(styles.marginBottom || 0);\n  const y = parseFloat(styles.marginLeft || 0) + parseFloat(styles.marginRight || 0);\n  const result = {\n    width: element.offsetWidth + y,\n    height: element.offsetHeight + x,\n  };\n  return result;\n}\n","/**\n * Get the opposite placement of the given one\n * @method\n * @memberof Popper.Utils\n * @argument {String} placement\n * @returns {String} flipped placement\n */\nexport default function getOppositePlacement(placement) {\n  const hash = { left: 'right', right: 'left', bottom: 'top', top: 'bottom' };\n  return placement.replace(/left|right|bottom|top/g, matched => hash[matched]);\n}\n","import getOuterSizes from './getOuterSizes';\nimport getOppositePlacement from './getOppositePlacement';\n\n/**\n * Get offsets to the popper\n * @method\n * @memberof Popper.Utils\n * @param {Object} position - CSS position the Popper will get applied\n * @param {HTMLElement} popper - the popper element\n * @param {Object} referenceOffsets - the reference offsets (the popper will be relative to this)\n * @param {String} placement - one of the valid placement options\n * @returns {Object} popperOffsets - An object containing the offsets which will be applied to the popper\n */\nexport default function getPopperOffsets(popper, referenceOffsets, placement) {\n  placement = placement.split('-')[0];\n\n  // Get popper node sizes\n  const popperRect = getOuterSizes(popper);\n\n  // Add position, width and height to our offsets object\n  const popperOffsets = {\n    width: popperRect.width,\n    height: popperRect.height,\n  };\n\n  // depending by the popper placement we have to compute its offsets slightly differently\n  const isHoriz = ['right', 'left'].indexOf(placement) !== -1;\n  const mainSide = isHoriz ? 'top' : 'left';\n  const secondarySide = isHoriz ? 'left' : 'top';\n  const measurement = isHoriz ? 'height' : 'width';\n  const secondaryMeasurement = !isHoriz ? 'height' : 'width';\n\n  popperOffsets[mainSide] =\n    referenceOffsets[mainSide] +\n    referenceOffsets[measurement] / 2 -\n    popperRect[measurement] / 2;\n  if (placement === secondarySide) {\n    popperOffsets[secondarySide] =\n      referenceOffsets[secondarySide] - popperRect[secondaryMeasurement];\n  } else {\n    popperOffsets[secondarySide] =\n      referenceOffsets[getOppositePlacement(secondarySide)];\n  }\n\n  return popperOffsets;\n}\n","/**\n * Mimics the `find` method of Array\n * @method\n * @memberof Popper.Utils\n * @argument {Array} arr\n * @argument prop\n * @argument value\n * @returns index or -1\n */\nexport default function find(arr, check) {\n  // use native find if supported\n  if (Array.prototype.find) {\n    return arr.find(check);\n  }\n\n  // use `filter` to obtain the same behavior of `find`\n  return arr.filter(check)[0];\n}\n","import find from './find';\n\n/**\n * Return the index of the matching object\n * @method\n * @memberof Popper.Utils\n * @argument {Array} arr\n * @argument prop\n * @argument value\n * @returns index or -1\n */\nexport default function findIndex(arr, prop, value) {\n  // use native findIndex if supported\n  if (Array.prototype.findIndex) {\n    return arr.findIndex(cur => cur[prop] === value);\n  }\n\n  // use `find` + `indexOf` if `findIndex` isn't supported\n  const match = find(arr, obj => obj[prop] === value);\n  return arr.indexOf(match);\n}\n","import isFunction from './isFunction';\nimport findIndex from './findIndex';\nimport getClientRect from '../utils/getClientRect';\n\n/**\n * Loop trough the list of modifiers and run them in order,\n * each of them will then edit the data object.\n * @method\n * @memberof Popper.Utils\n * @param {dataObject} data\n * @param {Array} modifiers\n * @param {String} ends - Optional modifier name used as stopper\n * @returns {dataObject}\n */\nexport default function runModifiers(modifiers, data, ends) {\n  const modifiersToRun = ends === undefined\n    ? modifiers\n    : modifiers.slice(0, findIndex(modifiers, 'name', ends));\n\n  modifiersToRun.forEach(modifier => {\n    if (modifier['function']) { // eslint-disable-line dot-notation\n      console.warn('`modifier.function` is deprecated, use `modifier.fn`!');\n    }\n    const fn = modifier['function'] || modifier.fn; // eslint-disable-line dot-notation\n    if (modifier.enabled && isFunction(fn)) {\n      // Add properties to offsets to make them a complete clientRect object\n      // we do this before each modifier to make sure the previous one doesn't\n      // mess with these values\n      data.offsets.popper = getClientRect(data.offsets.popper);\n      data.offsets.reference = getClientRect(data.offsets.reference);\n\n      data = fn(data, modifier);\n    }\n  });\n\n  return data;\n}\n","import computeAutoPlacement from '../utils/computeAutoPlacement';\nimport getReferenceOffsets from '../utils/getReferenceOffsets';\nimport getPopperOffsets from '../utils/getPopperOffsets';\nimport runModifiers from '../utils/runModifiers';\n\n/**\n * Updates the position of the popper, computing the new offsets and applying\n * the new style.<br />\n * Prefer `scheduleUpdate` over `update` because of performance reasons.\n * @method\n * @memberof Popper\n */\nexport default function update() {\n  // if popper is destroyed, don't perform any further update\n  if (this.state.isDestroyed) {\n    return;\n  }\n\n  let data = {\n    instance: this,\n    styles: {},\n    arrowStyles: {},\n    attributes: {},\n    flipped: false,\n    offsets: {},\n  };\n\n  // compute reference element offsets\n  data.offsets.reference = getReferenceOffsets(\n    this.state,\n    this.popper,\n    this.reference,\n    this.options.positionFixed\n  );\n\n  // compute auto placement, store placement inside the data object,\n  // modifiers will be able to edit `placement` if needed\n  // and refer to originalPlacement to know the original value\n  data.placement = computeAutoPlacement(\n    this.options.placement,\n    data.offsets.reference,\n    this.popper,\n    this.reference,\n    this.options.modifiers.flip.boundariesElement,\n    this.options.modifiers.flip.padding\n  );\n\n  // store the computed placement inside `originalPlacement`\n  data.originalPlacement = data.placement;\n\n  data.positionFixed = this.options.positionFixed;\n\n  // compute the popper offsets\n  data.offsets.popper = getPopperOffsets(\n    this.popper,\n    data.offsets.reference,\n    data.placement\n  );\n\n  data.offsets.popper.position = this.options.positionFixed\n    ? 'fixed'\n    : 'absolute';\n\n  // run the modifiers\n  data = runModifiers(this.modifiers, data);\n\n  // the first `update` will call `onCreate` callback\n  // the other ones will call `onUpdate` callback\n  if (!this.state.isCreated) {\n    this.state.isCreated = true;\n    this.options.onCreate(data);\n  } else {\n    this.options.onUpdate(data);\n  }\n}\n","/**\n * Helper used to know if the given modifier is enabled.\n * @method\n * @memberof Popper.Utils\n * @returns {Boolean}\n */\nexport default function isModifierEnabled(modifiers, modifierName) {\n  return modifiers.some(\n    ({ name, enabled }) => enabled && name === modifierName\n  );\n}\n","/**\n * Get the prefixed supported property name\n * @method\n * @memberof Popper.Utils\n * @argument {String} property (camelCase)\n * @returns {String} prefixed property (camelCase or PascalCase, depending on the vendor prefix)\n */\nexport default function getSupportedPropertyName(property) {\n  const prefixes = [false, 'ms', 'Webkit', 'Moz', 'O'];\n  const upperProp = property.charAt(0).toUpperCase() + property.slice(1);\n\n  for (let i = 0; i < prefixes.length; i++) {\n    const prefix = prefixes[i];\n    const toCheck = prefix ? `${prefix}${upperProp}` : property;\n    if (typeof document.body.style[toCheck] !== 'undefined') {\n      return toCheck;\n    }\n  }\n  return null;\n}\n","import isModifierEnabled from '../utils/isModifierEnabled';\nimport getSupportedPropertyName from '../utils/getSupportedPropertyName';\n\n/**\n * Destroys the popper.\n * @method\n * @memberof Popper\n */\nexport default function destroy() {\n  this.state.isDestroyed = true;\n\n  // touch DOM only if `applyStyle` modifier is enabled\n  if (isModifierEnabled(this.modifiers, 'applyStyle')) {\n    this.popper.removeAttribute('x-placement');\n    this.popper.style.position = '';\n    this.popper.style.top = '';\n    this.popper.style.left = '';\n    this.popper.style.right = '';\n    this.popper.style.bottom = '';\n    this.popper.style.willChange = '';\n    this.popper.style[getSupportedPropertyName('transform')] = '';\n  }\n\n  this.disableEventListeners();\n\n  // remove the popper if user explicitly asked for the deletion on destroy\n  // do not use `remove` because IE11 doesn't support it\n  if (this.options.removeOnDestroy) {\n    this.popper.parentNode.removeChild(this.popper);\n  }\n  return this;\n}\n","/**\n * Get the window associated with the element\n * @argument {Element} element\n * @returns {Window}\n */\nexport default function getWindow(element) {\n  const ownerDocument = element.ownerDocument;\n  return ownerDocument ? ownerDocument.defaultView : window;\n}\n","import getScrollParent from './getScrollParent';\nimport getWindow from './getWindow';\n\nfunction attachToScrollParents(scrollParent, event, callback, scrollParents) {\n  const isBody = scrollParent.nodeName === 'BODY';\n  const target = isBody ? scrollParent.ownerDocument.defaultView : scrollParent;\n  target.addEventListener(event, callback, { passive: true });\n\n  if (!isBody) {\n    attachToScrollParents(\n      getScrollParent(target.parentNode),\n      event,\n      callback,\n      scrollParents\n    );\n  }\n  scrollParents.push(target);\n}\n\n/**\n * Setup needed event listeners used to update the popper position\n * @method\n * @memberof Popper.Utils\n * @private\n */\nexport default function setupEventListeners(\n  reference,\n  options,\n  state,\n  updateBound\n) {\n  // Resize event listener on window\n  state.updateBound = updateBound;\n  getWindow(reference).addEventListener('resize', state.updateBound, { passive: true });\n\n  // Scroll event listener on scroll parents\n  const scrollElement = getScrollParent(reference);\n  attachToScrollParents(\n    scrollElement,\n    'scroll',\n    state.updateBound,\n    state.scrollParents\n  );\n  state.scrollElement = scrollElement;\n  state.eventsEnabled = true;\n\n  return state;\n}\n","import setupEventListeners from '../utils/setupEventListeners';\n\n/**\n * It will add resize/scroll events and start recalculating\n * position of the popper element when they are triggered.\n * @method\n * @memberof Popper\n */\nexport default function enableEventListeners() {\n  if (!this.state.eventsEnabled) {\n    this.state = setupEventListeners(\n      this.reference,\n      this.options,\n      this.state,\n      this.scheduleUpdate\n    );\n  }\n}\n","import getWindow from './getWindow';\n\n/**\n * Remove event listeners used to update the popper position\n * @method\n * @memberof Popper.Utils\n * @private\n */\nexport default function removeEventListeners(reference, state) {\n  // Remove resize event listener on window\n  getWindow(reference).removeEventListener('resize', state.updateBound);\n\n  // Remove scroll event listener on scroll parents\n  state.scrollParents.forEach(target => {\n    target.removeEventListener('scroll', state.updateBound);\n  });\n\n  // Reset state\n  state.updateBound = null;\n  state.scrollParents = [];\n  state.scrollElement = null;\n  state.eventsEnabled = false;\n  return state;\n}\n","import removeEventListeners from '../utils/removeEventListeners';\n\n/**\n * It will remove resize/scroll events and won't recalculate popper position\n * when they are triggered. It also won't trigger `onUpdate` callback anymore,\n * unless you call `update` method manually.\n * @method\n * @memberof Popper\n */\nexport default function disableEventListeners() {\n  if (this.state.eventsEnabled) {\n    cancelAnimationFrame(this.scheduleUpdate);\n    this.state = removeEventListeners(this.reference, this.state);\n  }\n}\n","/**\n * Tells if a given input is a number\n * @method\n * @memberof Popper.Utils\n * @param {*} input to check\n * @return {Boolean}\n */\nexport default function isNumeric(n) {\n  return n !== '' && !isNaN(parseFloat(n)) && isFinite(n);\n}\n","import isNumeric from './isNumeric';\n\n/**\n * Set the style to the given popper\n * @method\n * @memberof Popper.Utils\n * @argument {Element} element - Element to apply the style to\n * @argument {Object} styles\n * Object with a list of properties and values which will be applied to the element\n */\nexport default function setStyles(element, styles) {\n  Object.keys(styles).forEach(prop => {\n    let unit = '';\n    // add unit if the value is numeric and is one of the following\n    if (\n      ['width', 'height', 'top', 'right', 'bottom', 'left'].indexOf(prop) !==\n        -1 &&\n      isNumeric(styles[prop])\n    ) {\n      unit = 'px';\n    }\n    element.style[prop] = styles[prop] + unit;\n  });\n}\n","/**\n * Set the attributes to the given popper\n * @method\n * @memberof Popper.Utils\n * @argument {Element} element - Element to apply the attributes to\n * @argument {Object} styles\n * Object with a list of properties and values which will be applied to the element\n */\nexport default function setAttributes(element, attributes) {\n  Object.keys(attributes).forEach(function(prop) {\n    const value = attributes[prop];\n    if (value !== false) {\n      element.setAttribute(prop, attributes[prop]);\n    } else {\n      element.removeAttribute(prop);\n    }\n  });\n}\n","/**\n * @function\n * @memberof Popper.Utils\n * @argument {Object} data - The data object generated by `update` method\n * @argument {Boolean} shouldRound - If the offsets should be rounded at all\n * @returns {Object} The popper's position offsets rounded\n *\n * The tale of pixel-perfect positioning. It's still not 100% perfect, but as\n * good as it can be within reason.\n * Discussion here: https://github.com/FezVrasta/popper.js/pull/715\n *\n * Low DPI screens cause a popper to be blurry if not using full pixels (Safari\n * as well on High DPI screens).\n *\n * Firefox prefers no rounding for positioning and does not have blurriness on\n * high DPI screens.\n *\n * Only horizontal placement and left/right values need to be considered.\n */\nexport default function getRoundedOffsets(data, shouldRound) {\n  const { popper, reference } = data.offsets;\n  const { round, floor } = Math;\n  const noRound = v => v;\n  \n  const referenceWidth = round(reference.width);\n  const popperWidth = round(popper.width);\n  \n  const isVertical = ['left', 'right'].indexOf(data.placement) !== -1;\n  const isVariation = data.placement.indexOf('-') !== -1;\n  const sameWidthParity = referenceWidth % 2 === popperWidth % 2;\n  const bothOddWidth = referenceWidth % 2 === 1 && popperWidth % 2 === 1;\n\n  const horizontalToInteger = !shouldRound\n    ? noRound\n    : isVertical || isVariation || sameWidthParity\n    ? round\n    : floor;\n  const verticalToInteger = !shouldRound ? noRound : round;\n\n  return {\n    left: horizontalToInteger(\n      bothOddWidth && !isVariation && shouldRound\n        ? popper.left - 1\n        : popper.left\n    ),\n    top: verticalToInteger(popper.top),\n    bottom: verticalToInteger(popper.bottom),\n    right: horizontalToInteger(popper.right),\n  };\n}\n","import find from './find';\n\n/**\n * Helper used to know if the given modifier depends from another one.<br />\n * It checks if the needed modifier is listed and enabled.\n * @method\n * @memberof Popper.Utils\n * @param {Array} modifiers - list of modifiers\n * @param {String} requestingName - name of requesting modifier\n * @param {String} requestedName - name of requested modifier\n * @returns {Boolean}\n */\nexport default function isModifierRequired(\n  modifiers,\n  requestingName,\n  requestedName\n) {\n  const requesting = find(modifiers, ({ name }) => name === requestingName);\n\n  const isRequired =\n    !!requesting &&\n    modifiers.some(modifier => {\n      return (\n        modifier.name === requestedName &&\n        modifier.enabled &&\n        modifier.order < requesting.order\n      );\n    });\n\n  if (!isRequired) {\n    const requesting = `\\`${requestingName}\\``;\n    const requested = `\\`${requestedName}\\``;\n    console.warn(\n      `${requested} modifier is required by ${requesting} modifier in order to work, be sure to include it before ${requesting}!`\n    );\n  }\n  return isRequired;\n}\n","/**\n * Get the opposite placement variation of the given one\n * @method\n * @memberof Popper.Utils\n * @argument {String} placement variation\n * @returns {String} flipped placement variation\n */\nexport default function getOppositeVariation(variation) {\n  if (variation === 'end') {\n    return 'start';\n  } else if (variation === 'start') {\n    return 'end';\n  }\n  return variation;\n}\n","import placements from '../methods/placements';\n\n// Get rid of `auto` `auto-start` and `auto-end`\nconst validPlacements = placements.slice(3);\n\n/**\n * Given an initial placement, returns all the subsequent placements\n * clockwise (or counter-clockwise).\n *\n * @method\n * @memberof Popper.Utils\n * @argument {String} placement - A valid placement (it accepts variations)\n * @argument {Boolean} counter - Set to true to walk the placements counterclockwise\n * @returns {Array} placements including their variations\n */\nexport default function clockwise(placement, counter = false) {\n  const index = validPlacements.indexOf(placement);\n  const arr = validPlacements\n    .slice(index + 1)\n    .concat(validPlacements.slice(0, index));\n  return counter ? arr.reverse() : arr;\n}\n","import isNumeric from '../utils/isNumeric';\nimport getClientRect from '../utils/getClientRect';\nimport find from '../utils/find';\n\n/**\n * Converts a string containing value + unit into a px value number\n * @function\n * @memberof {modifiers~offset}\n * @private\n * @argument {String} str - Value + unit string\n * @argument {String} measurement - `height` or `width`\n * @argument {Object} popperOffsets\n * @argument {Object} referenceOffsets\n * @returns {Number|String}\n * Value in pixels, or original string if no values were extracted\n */\nexport function toValue(str, measurement, popperOffsets, referenceOffsets) {\n  // separate value from unit\n  const split = str.match(/((?:\\-|\\+)?\\d*\\.?\\d*)(.*)/);\n  const value = +split[1];\n  const unit = split[2];\n\n  // If it's not a number it's an operator, I guess\n  if (!value) {\n    return str;\n  }\n\n  if (unit.indexOf('%') === 0) {\n    let element;\n    switch (unit) {\n      case '%p':\n        element = popperOffsets;\n        break;\n      case '%':\n      case '%r':\n      default:\n        element = referenceOffsets;\n    }\n\n    const rect = getClientRect(element);\n    return rect[measurement] / 100 * value;\n  } else if (unit === 'vh' || unit === 'vw') {\n    // if is a vh or vw, we calculate the size based on the viewport\n    let size;\n    if (unit === 'vh') {\n      size = Math.max(\n        document.documentElement.clientHeight,\n        window.innerHeight || 0\n      );\n    } else {\n      size = Math.max(\n        document.documentElement.clientWidth,\n        window.innerWidth || 0\n      );\n    }\n    return size / 100 * value;\n  } else {\n    // if is an explicit pixel unit, we get rid of the unit and keep the value\n    // if is an implicit unit, it's px, and we return just the value\n    return value;\n  }\n}\n\n/**\n * Parse an `offset` string to extrapolate `x` and `y` numeric offsets.\n * @function\n * @memberof {modifiers~offset}\n * @private\n * @argument {String} offset\n * @argument {Object} popperOffsets\n * @argument {Object} referenceOffsets\n * @argument {String} basePlacement\n * @returns {Array} a two cells array with x and y offsets in numbers\n */\nexport function parseOffset(\n  offset,\n  popperOffsets,\n  referenceOffsets,\n  basePlacement\n) {\n  const offsets = [0, 0];\n\n  // Use height if placement is left or right and index is 0 otherwise use width\n  // in this way the first offset will use an axis and the second one\n  // will use the other one\n  const useHeight = ['right', 'left'].indexOf(basePlacement) !== -1;\n\n  // Split the offset string to obtain a list of values and operands\n  // The regex addresses values with the plus or minus sign in front (+10, -20, etc)\n  const fragments = offset.split(/(\\+|\\-)/).map(frag => frag.trim());\n\n  // Detect if the offset string contains a pair of values or a single one\n  // they could be separated by comma or space\n  const divider = fragments.indexOf(\n    find(fragments, frag => frag.search(/,|\\s/) !== -1)\n  );\n\n  if (fragments[divider] && fragments[divider].indexOf(',') === -1) {\n    console.warn(\n      'Offsets separated by white space(s) are deprecated, use a comma (,) instead.'\n    );\n  }\n\n  // If divider is found, we divide the list of values and operands to divide\n  // them by ofset X and Y.\n  const splitRegex = /\\s*,\\s*|\\s+/;\n  let ops = divider !== -1\n    ? [\n        fragments\n          .slice(0, divider)\n          .concat([fragments[divider].split(splitRegex)[0]]),\n        [fragments[divider].split(splitRegex)[1]].concat(\n          fragments.slice(divider + 1)\n        ),\n      ]\n    : [fragments];\n\n  // Convert the values with units to absolute pixels to allow our computations\n  ops = ops.map((op, index) => {\n    // Most of the units rely on the orientation of the popper\n    const measurement = (index === 1 ? !useHeight : useHeight)\n      ? 'height'\n      : 'width';\n    let mergeWithPrevious = false;\n    return (\n      op\n        // This aggregates any `+` or `-` sign that aren't considered operators\n        // e.g.: 10 + +5 => [10, +, +5]\n        .reduce((a, b) => {\n          if (a[a.length - 1] === '' && ['+', '-'].indexOf(b) !== -1) {\n            a[a.length - 1] = b;\n            mergeWithPrevious = true;\n            return a;\n          } else if (mergeWithPrevious) {\n            a[a.length - 1] += b;\n            mergeWithPrevious = false;\n            return a;\n          } else {\n            return a.concat(b);\n          }\n        }, [])\n        // Here we convert the string values into number values (in px)\n        .map(str => toValue(str, measurement, popperOffsets, referenceOffsets))\n    );\n  });\n\n  // Loop trough the offsets arrays and execute the operations\n  ops.forEach((op, index) => {\n    op.forEach((frag, index2) => {\n      if (isNumeric(frag)) {\n        offsets[index] += frag * (op[index2 - 1] === '-' ? -1 : 1);\n      }\n    });\n  });\n  return offsets;\n}\n\n/**\n * @function\n * @memberof Modifiers\n * @argument {Object} data - The data object generated by update method\n * @argument {Object} options - Modifiers configuration and options\n * @argument {Number|String} options.offset=0\n * The offset value as described in the modifier description\n * @returns {Object} The data object, properly modified\n */\nexport default function offset(data, { offset }) {\n  const { placement, offsets: { popper, reference } } = data;\n  const basePlacement = placement.split('-')[0];\n\n  let offsets;\n  if (isNumeric(+offset)) {\n    offsets = [+offset, 0];\n  } else {\n    offsets = parseOffset(offset, popper, reference, basePlacement);\n  }\n\n  if (basePlacement === 'left') {\n    popper.top += offsets[0];\n    popper.left -= offsets[1];\n  } else if (basePlacement === 'right') {\n    popper.top += offsets[0];\n    popper.left += offsets[1];\n  } else if (basePlacement === 'top') {\n    popper.left += offsets[0];\n    popper.top -= offsets[1];\n  } else if (basePlacement === 'bottom') {\n    popper.left += offsets[0];\n    popper.top += offsets[1];\n  }\n\n  data.popper = popper;\n  return data;\n}\n","import getClientRect from '../utils/getClientRect';\nimport getOuterSizes from '../utils/getOuterSizes';\nimport isModifierRequired from '../utils/isModifierRequired';\nimport getStyleComputedProperty from '../utils/getStyleComputedProperty';\n\n/**\n * @function\n * @memberof Modifiers\n * @argument {Object} data - The data object generated by update method\n * @argument {Object} options - Modifiers configuration and options\n * @returns {Object} The data object, properly modified\n */\nexport default function arrow(data, options) {\n  // arrow depends on keepTogether in order to work\n  if (!isModifierRequired(data.instance.modifiers, 'arrow', 'keepTogether')) {\n    return data;\n  }\n\n  let arrowElement = options.element;\n\n  // if arrowElement is a string, suppose it's a CSS selector\n  if (typeof arrowElement === 'string') {\n    arrowElement = data.instance.popper.querySelector(arrowElement);\n\n    // if arrowElement is not found, don't run the modifier\n    if (!arrowElement) {\n      return data;\n    }\n  } else {\n    // if the arrowElement isn't a query selector we must check that the\n    // provided DOM node is child of its popper node\n    if (!data.instance.popper.contains(arrowElement)) {\n      console.warn(\n        'WARNING: `arrow.element` must be child of its popper element!'\n      );\n      return data;\n    }\n  }\n\n  const placement = data.placement.split('-')[0];\n  const { popper, reference } = data.offsets;\n  const isVertical = ['left', 'right'].indexOf(placement) !== -1;\n\n  const len = isVertical ? 'height' : 'width';\n  const sideCapitalized = isVertical ? 'Top' : 'Left';\n  const side = sideCapitalized.toLowerCase();\n  const altSide = isVertical ? 'left' : 'top';\n  const opSide = isVertical ? 'bottom' : 'right';\n  const arrowElementSize = getOuterSizes(arrowElement)[len];\n\n  //\n  // extends keepTogether behavior making sure the popper and its\n  // reference have enough pixels in conjunction\n  //\n\n  // top/left side\n  if (reference[opSide] - arrowElementSize < popper[side]) {\n    data.offsets.popper[side] -=\n      popper[side] - (reference[opSide] - arrowElementSize);\n  }\n  // bottom/right side\n  if (reference[side] + arrowElementSize > popper[opSide]) {\n    data.offsets.popper[side] +=\n      reference[side] + arrowElementSize - popper[opSide];\n  }\n  data.offsets.popper = getClientRect(data.offsets.popper);\n\n  // compute center of the popper\n  const center = reference[side] + reference[len] / 2 - arrowElementSize / 2;\n\n  // Compute the sideValue using the updated popper offsets\n  // take popper margin in account because we don't have this info available\n  const css = getStyleComputedProperty(data.instance.popper);\n  const popperMarginSide = parseFloat(css[`margin${sideCapitalized}`], 10);\n  const popperBorderSide = parseFloat(css[`border${sideCapitalized}Width`], 10);\n  let sideValue =\n    center - data.offsets.popper[side] - popperMarginSide - popperBorderSide;\n\n  // prevent arrowElement from being placed not contiguously to its popper\n  sideValue = Math.max(Math.min(popper[len] - arrowElementSize, sideValue), 0);\n\n  data.arrowElement = arrowElement;\n  data.offsets.arrow = {\n    [side]: Math.round(sideValue),\n    [altSide]: '', // make sure to unset any eventual altSide value from the DOM node\n  };\n\n  return data;\n}\n","export default typeof window !== 'undefined' && typeof document !== 'undefined' && typeof navigator !== 'undefined';\n","import isBrowser from './isBrowser';\n\nconst timeoutDuration = (function(){\n  const longerTimeoutBrowsers = ['Edge', 'Trident', 'Firefox'];\n  for (let i = 0; i < longerTimeoutBrowsers.length; i += 1) {\n    if (isBrowser && navigator.userAgent.indexOf(longerTimeoutBrowsers[i]) >= 0) {\n      return 1;\n    }\n  }\n  return 0;\n}());\n\nexport function microtaskDebounce(fn) {\n  let called = false\n  return () => {\n    if (called) {\n      return\n    }\n    called = true\n    window.Promise.resolve().then(() => {\n      called = false\n      fn()\n    })\n  }\n}\n\nexport function taskDebounce(fn) {\n  let scheduled = false;\n  return () => {\n    if (!scheduled) {\n      scheduled = true;\n      setTimeout(() => {\n        scheduled = false;\n        fn();\n      }, timeoutDuration);\n    }\n  };\n}\n\nconst supportsMicroTasks = isBrowser && window.Promise\n\n\n/**\n* Create a debounced version of a method, that's asynchronously deferred\n* but called in the minimum time possible.\n*\n* @method\n* @memberof Popper.Utils\n* @argument {Function} fn\n* @returns {Function}\n*/\nexport default (supportsMicroTasks\n  ? microtaskDebounce\n  : taskDebounce);\n","import getSupportedPropertyName from '../utils/getSupportedPropertyName';\nimport find from '../utils/find';\nimport getOffsetParent from '../utils/getOffsetParent';\nimport getBoundingClientRect from '../utils/getBoundingClientRect';\nimport getRoundedOffsets from '../utils/getRoundedOffsets';\nimport isBrowser from '../utils/isBrowser';\n\nconst isFirefox = isBrowser && /Firefox/i.test(navigator.userAgent);\n\n/**\n * @function\n * @memberof Modifiers\n * @argument {Object} data - The data object generated by `update` method\n * @argument {Object} options - Modifiers configuration and options\n * @returns {Object} The data object, properly modified\n */\nexport default function computeStyle(data, options) {\n  const { x, y } = options;\n  const { popper } = data.offsets;\n\n  // Remove this legacy support in Popper.js v2\n  const legacyGpuAccelerationOption = find(\n    data.instance.modifiers,\n    modifier => modifier.name === 'applyStyle'\n  ).gpuAcceleration;\n  if (legacyGpuAccelerationOption !== undefined) {\n    console.warn(\n      'WARNING: `gpuAcceleration` option moved to `computeStyle` modifier and will not be supported in future versions of Popper.js!'\n    );\n  }\n  const gpuAcceleration =\n    legacyGpuAccelerationOption !== undefined\n      ? legacyGpuAccelerationOption\n      : options.gpuAcceleration;\n\n  const offsetParent = getOffsetParent(data.instance.popper);\n  const offsetParentRect = getBoundingClientRect(offsetParent);\n\n  // Styles\n  const styles = {\n    position: popper.position,\n  };\n\n  const offsets = getRoundedOffsets(\n    data,\n    window.devicePixelRatio < 2 || !isFirefox\n  );\n\n  const sideA = x === 'bottom' ? 'top' : 'bottom';\n  const sideB = y === 'right' ? 'left' : 'right';\n\n  // if gpuAcceleration is set to `true` and transform is supported,\n  //  we use `translate3d` to apply the position to the popper we\n  // automatically use the supported prefixed version if needed\n  const prefixedProperty = getSupportedPropertyName('transform');\n\n  // now, let's make a step back and look at this code closely (wtf?)\n  // If the content of the popper grows once it's been positioned, it\n  // may happen that the popper gets misplaced because of the new content\n  // overflowing its reference element\n  // To avoid this problem, we provide two options (x and y), which allow\n  // the consumer to define the offset origin.\n  // If we position a popper on top of a reference element, we can set\n  // `x` to `top` to make the popper grow towards its top instead of\n  // its bottom.\n  let left, top;\n  if (sideA === 'bottom') {\n    // when offsetParent is <html> the positioning is relative to the bottom of the screen (excluding the scrollbar)\n    // and not the bottom of the html element\n    if (offsetParent.nodeName === 'HTML') {\n      top = -offsetParent.clientHeight + offsets.bottom;\n    } else {\n      top = -offsetParentRect.height + offsets.bottom;\n    }\n  } else {\n    top = offsets.top;\n  }\n  if (sideB === 'right') {\n    if (offsetParent.nodeName === 'HTML') {\n      left = -offsetParent.clientWidth + offsets.right;\n    } else {\n      left = -offsetParentRect.width + offsets.right;\n    }\n  } else {\n    left = offsets.left;\n  }\n  if (gpuAcceleration && prefixedProperty) {\n    styles[prefixedProperty] = `translate3d(${left}px, ${top}px, 0)`;\n    styles[sideA] = 0;\n    styles[sideB] = 0;\n    styles.willChange = 'transform';\n  } else {\n    // othwerise, we use the standard `top`, `left`, `bottom` and `right` properties\n    const invertTop = sideA === 'bottom' ? -1 : 1;\n    const invertLeft = sideB === 'right' ? -1 : 1;\n    styles[sideA] = top * invertTop;\n    styles[sideB] = left * invertLeft;\n    styles.willChange = `${sideA}, ${sideB}`;\n  }\n\n  // Attributes\n  const attributes = {\n    'x-placement': data.placement,\n  };\n\n  // Update `data` attributes, styles and arrowStyles\n  data.attributes = { ...attributes, ...data.attributes };\n  data.styles = { ...styles, ...data.styles };\n  data.arrowStyles = { ...data.offsets.arrow, ...data.arrowStyles };\n\n  return data;\n}\n","import getOppositePlacement from '../utils/getOppositePlacement';\nimport getOppositeVariation from '../utils/getOppositeVariation';\nimport getPopperOffsets from '../utils/getPopperOffsets';\nimport runModifiers from '../utils/runModifiers';\nimport getBoundaries from '../utils/getBoundaries';\nimport isModifierEnabled from '../utils/isModifierEnabled';\nimport clockwise from '../utils/clockwise';\n\nconst BEHAVIORS = {\n  FLIP: 'flip',\n  CLOCKWISE: 'clockwise',\n  COUNTERCLOCKWISE: 'counterclockwise',\n};\n\n/**\n * @function\n * @memberof Modifiers\n * @argument {Object} data - The data object generated by update method\n * @argument {Object} options - Modifiers configuration and options\n * @returns {Object} The data object, properly modified\n */\nexport default function flip(data, options) {\n  // if `inner` modifier is enabled, we can't use the `flip` modifier\n  if (isModifierEnabled(data.instance.modifiers, 'inner')) {\n    return data;\n  }\n\n  if (data.flipped && data.placement === data.originalPlacement) {\n    // seems like flip is trying to loop, probably there's not enough space on any of the flippable sides\n    return data;\n  }\n\n  const boundaries = getBoundaries(\n    data.instance.popper,\n    data.instance.reference,\n    options.padding,\n    options.boundariesElement,\n    data.positionFixed\n  );\n\n  let placement = data.placement.split('-')[0];\n  let placementOpposite = getOppositePlacement(placement);\n  let variation = data.placement.split('-')[1] || '';\n\n  let flipOrder = [];\n\n  switch (options.behavior) {\n    case BEHAVIORS.FLIP:\n      flipOrder = [placement, placementOpposite];\n      break;\n    case BEHAVIORS.CLOCKWISE:\n      flipOrder = clockwise(placement);\n      break;\n    case BEHAVIORS.COUNTERCLOCKWISE:\n      flipOrder = clockwise(placement, true);\n      break;\n    default:\n      flipOrder = options.behavior;\n  }\n\n  flipOrder.forEach((step, index) => {\n    if (placement !== step || flipOrder.length === index + 1) {\n      return data;\n    }\n\n    placement = data.placement.split('-')[0];\n    placementOpposite = getOppositePlacement(placement);\n\n    const popperOffsets = data.offsets.popper;\n    const refOffsets = data.offsets.reference;\n\n    // using floor because the reference offsets may contain decimals we are not going to consider here\n    const floor = Math.floor;\n    const overlapsRef =\n      (placement === 'left' &&\n        floor(popperOffsets.right) > floor(refOffsets.left)) ||\n      (placement === 'right' &&\n        floor(popperOffsets.left) < floor(refOffsets.right)) ||\n      (placement === 'top' &&\n        floor(popperOffsets.bottom) > floor(refOffsets.top)) ||\n      (placement === 'bottom' &&\n        floor(popperOffsets.top) < floor(refOffsets.bottom));\n\n    const overflowsLeft = floor(popperOffsets.left) < floor(boundaries.left);\n    const overflowsRight = floor(popperOffsets.right) > floor(boundaries.right);\n    const overflowsTop = floor(popperOffsets.top) < floor(boundaries.top);\n    const overflowsBottom =\n      floor(popperOffsets.bottom) > floor(boundaries.bottom);\n\n    const overflowsBoundaries =\n      (placement === 'left' && overflowsLeft) ||\n      (placement === 'right' && overflowsRight) ||\n      (placement === 'top' && overflowsTop) ||\n      (placement === 'bottom' && overflowsBottom);\n\n    // flip the variation if required\n    const isVertical = ['top', 'bottom'].indexOf(placement) !== -1;\n\n    // flips variation if reference element overflows boundaries\n    const flippedVariationByRef =\n      !!options.flipVariations &&\n      ((isVertical && variation === 'start' && overflowsLeft) ||\n        (isVertical && variation === 'end' && overflowsRight) ||\n        (!isVertical && variation === 'start' && overflowsTop) ||\n        (!isVertical && variation === 'end' && overflowsBottom));\n\n    // flips variation if popper content overflows boundaries\n    const flippedVariationByContent =\n      !!options.flipVariationsByContent &&\n      ((isVertical && variation === 'start' && overflowsRight) ||\n        (isVertical && variation === 'end' && overflowsLeft) ||\n        (!isVertical && variation === 'start' && overflowsBottom) ||\n        (!isVertical && variation === 'end' && overflowsTop));\n\n    const flippedVariation = flippedVariationByRef || flippedVariationByContent;\n\n    if (overlapsRef || overflowsBoundaries || flippedVariation) {\n      // this boolean to detect any flip loop\n      data.flipped = true;\n\n      if (overlapsRef || overflowsBoundaries) {\n        placement = flipOrder[index + 1];\n      }\n\n      if (flippedVariation) {\n        variation = getOppositeVariation(variation);\n      }\n\n      data.placement = placement + (variation ? '-' + variation : '');\n\n      // this object contains `position`, we want to preserve it along with\n      // any additional property we may add in the future\n      data.offsets.popper = {\n        ...data.offsets.popper,\n        ...getPopperOffsets(\n          data.instance.popper,\n          data.offsets.reference,\n          data.placement\n        ),\n      };\n\n      data = runModifiers(data.instance.modifiers, data, 'flip');\n    }\n  });\n  return data;\n}\n","// Utils\nimport debounce from './utils/debounce';\nimport isFunction from './utils/isFunction';\n\n// Methods\nimport update from './methods/update';\nimport destroy from './methods/destroy';\nimport enableEventListeners from './methods/enableEventListeners';\nimport disableEventListeners from './methods/disableEventListeners';\nimport Defaults from './methods/defaults';\nimport placements from './methods/placements';\n\nexport default class Popper {\n  /**\n   * Creates a new Popper.js instance.\n   * @class Popper\n   * @param {Element|referenceObject} reference - The reference element used to position the popper\n   * @param {Element} popper - The HTML / XML element used as the popper\n   * @param {Object} options - Your custom options to override the ones defined in [Defaults](#defaults)\n   * @return {Object} instance - The generated Popper.js instance\n   */\n  constructor(reference, popper, options = {}) {\n    // make update() debounced, so that it only runs at most once-per-tick\n    this.update = debounce(this.update.bind(this));\n\n    // with {} we create a new object with the options inside it\n    this.options = { ...Popper.Defaults, ...options };\n\n    // init state\n    this.state = {\n      isDestroyed: false,\n      isCreated: false,\n      scrollParents: [],\n    };\n\n    // get reference and popper elements (allow jQuery wrappers)\n    this.reference = reference && reference.jquery ? reference[0] : reference;\n    this.popper = popper && popper.jquery ? popper[0] : popper;\n\n    // Deep merge modifiers options\n    this.options.modifiers = {};\n    Object.keys({\n      ...Popper.Defaults.modifiers,\n      ...options.modifiers,\n    }).forEach(name => {\n      this.options.modifiers[name] = {\n        // If it's a built-in modifier, use it as base\n        ...(Popper.Defaults.modifiers[name] || {}),\n        // If there are custom options, override and merge with default ones\n        ...(options.modifiers ? options.modifiers[name] : {}),\n      };\n    });\n\n    // Refactoring modifiers' list (Object => Array)\n    this.modifiers = Object.keys(this.options.modifiers)\n      .map(name => ({\n        name,\n        ...this.options.modifiers[name],\n      }))\n      // sort the modifiers by order\n      .sort((a, b) => a.order - b.order);\n\n    // modifiers have the ability to execute arbitrary code when Popper.js get inited\n    // such code is executed in the same order of its modifier\n    // they could add new properties to their options configuration\n    // BE AWARE: don't add options to `options.modifiers.name` but to `modifierOptions`!\n    this.modifiers.forEach(modifierOptions => {\n      if (modifierOptions.enabled && isFunction(modifierOptions.onLoad)) {\n        modifierOptions.onLoad(\n          this.reference,\n          this.popper,\n          this.options,\n          modifierOptions,\n          this.state\n        );\n      }\n    });\n\n    // fire the first update to position the popper in the right place\n    this.update();\n\n    const eventsEnabled = this.options.eventsEnabled;\n    if (eventsEnabled) {\n      // setup event listeners, they will take care of update the position in specific situations\n      this.enableEventListeners();\n    }\n\n    this.state.eventsEnabled = eventsEnabled;\n  }\n\n  // We can't use class properties because they don't get listed in the\n  // class prototype and break stuff like Sinon stubs\n  update() {\n    return update.call(this);\n  }\n  destroy() {\n    return destroy.call(this);\n  }\n  enableEventListeners() {\n    return enableEventListeners.call(this);\n  }\n  disableEventListeners() {\n    return disableEventListeners.call(this);\n  }\n\n  /**\n   * Schedules an update. It will run on the next UI update available.\n   * @method scheduleUpdate\n   * @memberof Popper\n   */\n  scheduleUpdate = () => requestAnimationFrame(this.update);\n\n  /**\n   * Collection of utilities useful when writing custom modifiers.\n   * Starting from version 1.7, this method is available only if you\n   * include `popper-utils.js` before `popper.js`.\n   *\n   * **DEPRECATION**: This way to access PopperUtils is deprecated\n   * and will be removed in v2! Use the PopperUtils module directly instead.\n   * Due to the high instability of the methods contained in Utils, we can't\n   * guarantee them to follow semver. Use them at your own risk!\n   * @static\n   * @private\n   * @type {Object}\n   * @deprecated since version 1.8\n   * @member Utils\n   * @memberof Popper\n   */\n  static Utils = (typeof window !== 'undefined' ? window : global).PopperUtils;\n\n  static placements = placements;\n\n  static Defaults = Defaults;\n}\n\n/**\n * The `referenceObject` is an object that provides an interface compatible with Popper.js\n * and lets you use it as replacement of a real DOM node.<br />\n * You can use this method to position a popper relatively to a set of coordinates\n * in case you don't have a DOM node to use as reference.\n *\n * ```\n * new Popper(referenceObject, popperNode);\n * ```\n *\n * NB: This feature isn't supported in Internet Explorer 10.\n * @name referenceObject\n * @property {Function} data.getBoundingClientRect\n * A function that returns a set of coordinates compatible with the native `getBoundingClientRect` method.\n * @property {number} data.clientWidth\n * An ES6 getter that will return the width of the virtual reference element.\n * @property {number} data.clientHeight\n * An ES6 getter that will return the height of the virtual reference element.\n */\n","import modifiers from '../modifiers/index';\n\n/**\n * Default options provided to Popper.js constructor.<br />\n * These can be overridden using the `options` argument of Popper.js.<br />\n * To override an option, simply pass an object with the same\n * structure of the `options` object, as the 3rd argument. For example:\n * ```\n * new Popper(ref, pop, {\n *   modifiers: {\n *     preventOverflow: { enabled: false }\n *   }\n * })\n * ```\n * @type {Object}\n * @static\n * @memberof Popper\n */\nexport default {\n  /**\n   * Popper's placement.\n   * @prop {Popper.placements} placement='bottom'\n   */\n  placement: 'bottom',\n\n  /**\n   * Set this to true if you want popper to position it self in 'fixed' mode\n   * @prop {Boolean} positionFixed=false\n   */\n  positionFixed: false,\n\n  /**\n   * Whether events (resize, scroll) are initially enabled.\n   * @prop {Boolean} eventsEnabled=true\n   */\n  eventsEnabled: true,\n\n  /**\n   * Set to true if you want to automatically remove the popper when\n   * you call the `destroy` method.\n   * @prop {Boolean} removeOnDestroy=false\n   */\n  removeOnDestroy: false,\n\n  /**\n   * Callback called when the popper is created.<br />\n   * By default, it is set to no-op.<br />\n   * Access Popper.js instance with `data.instance`.\n   * @prop {onCreate}\n   */\n  onCreate: () => {},\n\n  /**\n   * Callback called when the popper is updated. This callback is not called\n   * on the initialization/creation of the popper, but only on subsequent\n   * updates.<br />\n   * By default, it is set to no-op.<br />\n   * Access Popper.js instance with `data.instance`.\n   * @prop {onUpdate}\n   */\n  onUpdate: () => {},\n\n  /**\n   * List of modifiers used to modify the offsets before they are applied to the popper.\n   * They provide most of the functionalities of Popper.js.\n   * @prop {modifiers}\n   */\n  modifiers,\n};\n\n/**\n * @callback onCreate\n * @param {dataObject} data\n */\n\n/**\n * @callback onUpdate\n * @param {dataObject} data\n */\n","import applyStyle, { applyStyleOnLoad } from './applyStyle';\nimport computeStyle from './computeStyle';\nimport arrow from './arrow';\nimport flip from './flip';\nimport keepTogether from './keepTogether';\nimport offset from './offset';\nimport preventOverflow from './preventOverflow';\nimport shift from './shift';\nimport hide from './hide';\nimport inner from './inner';\n\n/**\n * Modifier function, each modifier can have a function of this type assigned\n * to its `fn` property.<br />\n * These functions will be called on each update, this means that you must\n * make sure they are performant enough to avoid performance bottlenecks.\n *\n * @function ModifierFn\n * @argument {dataObject} data - The data object generated by `update` method\n * @argument {Object} options - Modifiers configuration and options\n * @returns {dataObject} The data object, properly modified\n */\n\n/**\n * Modifiers are plugins used to alter the behavior of your poppers.<br />\n * Popper.js uses a set of 9 modifiers to provide all the basic functionalities\n * needed by the library.\n *\n * Usually you don't want to override the `order`, `fn` and `onLoad` props.\n * All the other properties are configurations that could be tweaked.\n * @namespace modifiers\n */\nexport default {\n  /**\n   * Modifier used to shift the popper on the start or end of its reference\n   * element.<br />\n   * It will read the variation of the `placement` property.<br />\n   * It can be one either `-end` or `-start`.\n   * @memberof modifiers\n   * @inner\n   */\n  shift: {\n    /** @prop {number} order=100 - Index used to define the order of execution */\n    order: 100,\n    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */\n    enabled: true,\n    /** @prop {ModifierFn} */\n    fn: shift,\n  },\n\n  /**\n   * The `offset` modifier can shift your popper on both its axis.\n   *\n   * It accepts the following units:\n   * - `px` or unit-less, interpreted as pixels\n   * - `%` or `%r`, percentage relative to the length of the reference element\n   * - `%p`, percentage relative to the length of the popper element\n   * - `vw`, CSS viewport width unit\n   * - `vh`, CSS viewport height unit\n   *\n   * For length is intended the main axis relative to the placement of the popper.<br />\n   * This means that if the placement is `top` or `bottom`, the length will be the\n   * `width`. In case of `left` or `right`, it will be the `height`.\n   *\n   * You can provide a single value (as `Number` or `String`), or a pair of values\n   * as `String` divided by a comma or one (or more) white spaces.<br />\n   * The latter is a deprecated method because it leads to confusion and will be\n   * removed in v2.<br />\n   * Additionally, it accepts additions and subtractions between different units.\n   * Note that multiplications and divisions aren't supported.\n   *\n   * Valid examples are:\n   * ```\n   * 10\n   * '10%'\n   * '10, 10'\n   * '10%, 10'\n   * '10 + 10%'\n   * '10 - 5vh + 3%'\n   * '-10px + 5vh, 5px - 6%'\n   * ```\n   * > **NB**: If you desire to apply offsets to your poppers in a way that may make them overlap\n   * > with their reference element, unfortunately, you will have to disable the `flip` modifier.\n   * > You can read more on this at this [issue](https://github.com/FezVrasta/popper.js/issues/373).\n   *\n   * @memberof modifiers\n   * @inner\n   */\n  offset: {\n    /** @prop {number} order=200 - Index used to define the order of execution */\n    order: 200,\n    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */\n    enabled: true,\n    /** @prop {ModifierFn} */\n    fn: offset,\n    /** @prop {Number|String} offset=0\n     * The offset value as described in the modifier description\n     */\n    offset: 0,\n  },\n\n  /**\n   * Modifier used to prevent the popper from being positioned outside the boundary.\n   *\n   * A scenario exists where the reference itself is not within the boundaries.<br />\n   * We can say it has \"escaped the boundaries\" — or just \"escaped\".<br />\n   * In this case we need to decide whether the popper should either:\n   *\n   * - detach from the reference and remain \"trapped\" in the boundaries, or\n   * - if it should ignore the boundary and \"escape with its reference\"\n   *\n   * When `escapeWithReference` is set to`true` and reference is completely\n   * outside its boundaries, the popper will overflow (or completely leave)\n   * the boundaries in order to remain attached to the edge of the reference.\n   *\n   * @memberof modifiers\n   * @inner\n   */\n  preventOverflow: {\n    /** @prop {number} order=300 - Index used to define the order of execution */\n    order: 300,\n    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */\n    enabled: true,\n    /** @prop {ModifierFn} */\n    fn: preventOverflow,\n    /**\n     * @prop {Array} [priority=['left','right','top','bottom']]\n     * Popper will try to prevent overflow following these priorities by default,\n     * then, it could overflow on the left and on top of the `boundariesElement`\n     */\n    priority: ['left', 'right', 'top', 'bottom'],\n    /**\n     * @prop {number} padding=5\n     * Amount of pixel used to define a minimum distance between the boundaries\n     * and the popper. This makes sure the popper always has a little padding\n     * between the edges of its container\n     */\n    padding: 5,\n    /**\n     * @prop {String|HTMLElement} boundariesElement='scrollParent'\n     * Boundaries used by the modifier. Can be `scrollParent`, `window`,\n     * `viewport` or any DOM element.\n     */\n    boundariesElement: 'scrollParent',\n  },\n\n  /**\n   * Modifier used to make sure the reference and its popper stay near each other\n   * without leaving any gap between the two. Especially useful when the arrow is\n   * enabled and you want to ensure that it points to its reference element.\n   * It cares only about the first axis. You can still have poppers with margin\n   * between the popper and its reference element.\n   * @memberof modifiers\n   * @inner\n   */\n  keepTogether: {\n    /** @prop {number} order=400 - Index used to define the order of execution */\n    order: 400,\n    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */\n    enabled: true,\n    /** @prop {ModifierFn} */\n    fn: keepTogether,\n  },\n\n  /**\n   * This modifier is used to move the `arrowElement` of the popper to make\n   * sure it is positioned between the reference element and its popper element.\n   * It will read the outer size of the `arrowElement` node to detect how many\n   * pixels of conjunction are needed.\n   *\n   * It has no effect if no `arrowElement` is provided.\n   * @memberof modifiers\n   * @inner\n   */\n  arrow: {\n    /** @prop {number} order=500 - Index used to define the order of execution */\n    order: 500,\n    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */\n    enabled: true,\n    /** @prop {ModifierFn} */\n    fn: arrow,\n    /** @prop {String|HTMLElement} element='[x-arrow]' - Selector or node used as arrow */\n    element: '[x-arrow]',\n  },\n\n  /**\n   * Modifier used to flip the popper's placement when it starts to overlap its\n   * reference element.\n   *\n   * Requires the `preventOverflow` modifier before it in order to work.\n   *\n   * **NOTE:** this modifier will interrupt the current update cycle and will\n   * restart it if it detects the need to flip the placement.\n   * @memberof modifiers\n   * @inner\n   */\n  flip: {\n    /** @prop {number} order=600 - Index used to define the order of execution */\n    order: 600,\n    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */\n    enabled: true,\n    /** @prop {ModifierFn} */\n    fn: flip,\n    /**\n     * @prop {String|Array} behavior='flip'\n     * The behavior used to change the popper's placement. It can be one of\n     * `flip`, `clockwise`, `counterclockwise` or an array with a list of valid\n     * placements (with optional variations)\n     */\n    behavior: 'flip',\n    /**\n     * @prop {number} padding=5\n     * The popper will flip if it hits the edges of the `boundariesElement`\n     */\n    padding: 5,\n    /**\n     * @prop {String|HTMLElement} boundariesElement='viewport'\n     * The element which will define the boundaries of the popper position.\n     * The popper will never be placed outside of the defined boundaries\n     * (except if `keepTogether` is enabled)\n     */\n    boundariesElement: 'viewport',\n    /**\n     * @prop {Boolean} flipVariations=false\n     * The popper will switch placement variation between `-start` and `-end` when\n     * the reference element overlaps its boundaries.\n     *\n     * The original placement should have a set variation.\n     */\n    flipVariations: false,\n    /**\n     * @prop {Boolean} flipVariationsByContent=false\n     * The popper will switch placement variation between `-start` and `-end` when\n     * the popper element overlaps its reference boundaries.\n     *\n     * The original placement should have a set variation.\n     */\n    flipVariationsByContent: false,\n  },\n\n  /**\n   * Modifier used to make the popper flow toward the inner of the reference element.\n   * By default, when this modifier is disabled, the popper will be placed outside\n   * the reference element.\n   * @memberof modifiers\n   * @inner\n   */\n  inner: {\n    /** @prop {number} order=700 - Index used to define the order of execution */\n    order: 700,\n    /** @prop {Boolean} enabled=false - Whether the modifier is enabled or not */\n    enabled: false,\n    /** @prop {ModifierFn} */\n    fn: inner,\n  },\n\n  /**\n   * Modifier used to hide the popper when its reference element is outside of the\n   * popper boundaries. It will set a `x-out-of-boundaries` attribute which can\n   * be used to hide with a CSS selector the popper when its reference is\n   * out of boundaries.\n   *\n   * Requires the `preventOverflow` modifier before it in order to work.\n   * @memberof modifiers\n   * @inner\n   */\n  hide: {\n    /** @prop {number} order=800 - Index used to define the order of execution */\n    order: 800,\n    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */\n    enabled: true,\n    /** @prop {ModifierFn} */\n    fn: hide,\n  },\n\n  /**\n   * Computes the style that will be applied to the popper element to gets\n   * properly positioned.\n   *\n   * Note that this modifier will not touch the DOM, it just prepares the styles\n   * so that `applyStyle` modifier can apply it. This separation is useful\n   * in case you need to replace `applyStyle` with a custom implementation.\n   *\n   * This modifier has `850` as `order` value to maintain backward compatibility\n   * with previous versions of Popper.js. Expect the modifiers ordering method\n   * to change in future major versions of the library.\n   *\n   * @memberof modifiers\n   * @inner\n   */\n  computeStyle: {\n    /** @prop {number} order=850 - Index used to define the order of execution */\n    order: 850,\n    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */\n    enabled: true,\n    /** @prop {ModifierFn} */\n    fn: computeStyle,\n    /**\n     * @prop {Boolean} gpuAcceleration=true\n     * If true, it uses the CSS 3D transformation to position the popper.\n     * Otherwise, it will use the `top` and `left` properties\n     */\n    gpuAcceleration: true,\n    /**\n     * @prop {string} [x='bottom']\n     * Where to anchor the X axis (`bottom` or `top`). AKA X offset origin.\n     * Change this if your popper should grow in a direction different from `bottom`\n     */\n    x: 'bottom',\n    /**\n     * @prop {string} [x='left']\n     * Where to anchor the Y axis (`left` or `right`). AKA Y offset origin.\n     * Change this if your popper should grow in a direction different from `right`\n     */\n    y: 'right',\n  },\n\n  /**\n   * Applies the computed styles to the popper element.\n   *\n   * All the DOM manipulations are limited to this modifier. This is useful in case\n   * you want to integrate Popper.js inside a framework or view library and you\n   * want to delegate all the DOM manipulations to it.\n   *\n   * Note that if you disable this modifier, you must make sure the popper element\n   * has its position set to `absolute` before Popper.js can do its work!\n   *\n   * Just disable this modifier and define your own to achieve the desired effect.\n   *\n   * @memberof modifiers\n   * @inner\n   */\n  applyStyle: {\n    /** @prop {number} order=900 - Index used to define the order of execution */\n    order: 900,\n    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */\n    enabled: true,\n    /** @prop {ModifierFn} */\n    fn: applyStyle,\n    /** @prop {Function} */\n    onLoad: applyStyleOnLoad,\n    /**\n     * @deprecated since version 1.10.0, the property moved to `computeStyle` modifier\n     * @prop {Boolean} gpuAcceleration=true\n     * If true, it uses the CSS 3D transformation to position the popper.\n     * Otherwise, it will use the `top` and `left` properties\n     */\n    gpuAcceleration: undefined,\n  },\n};\n\n/**\n * The `dataObject` is an object containing all the information used by Popper.js.\n * This object is passed to modifiers and to the `onCreate` and `onUpdate` callbacks.\n * @name dataObject\n * @property {Object} data.instance The Popper.js instance\n * @property {String} data.placement Placement applied to popper\n * @property {String} data.originalPlacement Placement originally defined on init\n * @property {Boolean} data.flipped True if popper has been flipped by flip modifier\n * @property {Boolean} data.hide True if the reference element is out of boundaries, useful to know when to hide the popper\n * @property {HTMLElement} data.arrowElement Node used as arrow by arrow modifier\n * @property {Object} data.styles Any CSS property defined here will be applied to the popper. It expects the JavaScript nomenclature (eg. `marginBottom`)\n * @property {Object} data.arrowStyles Any CSS property defined here will be applied to the popper arrow. It expects the JavaScript nomenclature (eg. `marginBottom`)\n * @property {Object} data.boundaries Offsets of the popper boundaries\n * @property {Object} data.offsets The measurements of popper, reference and arrow elements\n * @property {Object} data.offsets.popper `top`, `left`, `width`, `height` values\n * @property {Object} data.offsets.reference `top`, `left`, `width`, `height` values\n * @property {Object} data.offsets.arrow] `top` and `left` offsets, only one of them will be different from 0\n */\n","/**\n * @function\n * @memberof Modifiers\n * @argument {Object} data - The data object generated by `update` method\n * @argument {Object} options - Modifiers configuration and options\n * @returns {Object} The data object, properly modified\n */\nexport default function shift(data) {\n  const placement = data.placement;\n  const basePlacement = placement.split('-')[0];\n  const shiftvariation = placement.split('-')[1];\n\n  // if shift shiftvariation is specified, run the modifier\n  if (shiftvariation) {\n    const { reference, popper } = data.offsets;\n    const isVertical = ['bottom', 'top'].indexOf(basePlacement) !== -1;\n    const side = isVertical ? 'left' : 'top';\n    const measurement = isVertical ? 'width' : 'height';\n\n    const shiftOffsets = {\n      start: { [side]: reference[side] },\n      end: {\n        [side]: reference[side] + reference[measurement] - popper[measurement],\n      },\n    };\n\n    data.offsets.popper = { ...popper, ...shiftOffsets[shiftvariation] };\n  }\n\n  return data;\n}\n","import getOffsetParent from '../utils/getOffsetParent';\nimport getBoundaries from '../utils/getBoundaries';\nimport getSupportedPropertyName from '../utils/getSupportedPropertyName';\n\n/**\n * @function\n * @memberof Modifiers\n * @argument {Object} data - The data object generated by `update` method\n * @argument {Object} options - Modifiers configuration and options\n * @returns {Object} The data object, properly modified\n */\nexport default function preventOverflow(data, options) {\n  let boundariesElement =\n    options.boundariesElement || getOffsetParent(data.instance.popper);\n\n  // If offsetParent is the reference element, we really want to\n  // go one step up and use the next offsetParent as reference to\n  // avoid to make this modifier completely useless and look like broken\n  if (data.instance.reference === boundariesElement) {\n    boundariesElement = getOffsetParent(boundariesElement);\n  }\n\n  // NOTE: DOM access here\n  // resets the popper's position so that the document size can be calculated excluding\n  // the size of the popper element itself\n  const transformProp = getSupportedPropertyName('transform');\n  const popperStyles = data.instance.popper.style; // assignment to help minification\n  const { top, left, [transformProp]: transform } = popperStyles;\n  popperStyles.top = '';\n  popperStyles.left = '';\n  popperStyles[transformProp] = '';\n\n  const boundaries = getBoundaries(\n    data.instance.popper,\n    data.instance.reference,\n    options.padding,\n    boundariesElement,\n    data.positionFixed\n  );\n\n  // NOTE: DOM access here\n  // restores the original style properties after the offsets have been computed\n  popperStyles.top = top;\n  popperStyles.left = left;\n  popperStyles[transformProp] = transform;\n\n  options.boundaries = boundaries;\n\n  const order = options.priority;\n  let popper = data.offsets.popper;\n\n  const check = {\n    primary(placement) {\n      let value = popper[placement];\n      if (\n        popper[placement] < boundaries[placement] &&\n        !options.escapeWithReference\n      ) {\n        value = Math.max(popper[placement], boundaries[placement]);\n      }\n      return { [placement]: value };\n    },\n    secondary(placement) {\n      const mainSide = placement === 'right' ? 'left' : 'top';\n      let value = popper[mainSide];\n      if (\n        popper[placement] > boundaries[placement] &&\n        !options.escapeWithReference\n      ) {\n        value = Math.min(\n          popper[mainSide],\n          boundaries[placement] -\n            (placement === 'right' ? popper.width : popper.height)\n        );\n      }\n      return { [mainSide]: value };\n    },\n  };\n\n  order.forEach(placement => {\n    const side =\n      ['left', 'top'].indexOf(placement) !== -1 ? 'primary' : 'secondary';\n    popper = { ...popper, ...check[side](placement) };\n  });\n\n  data.offsets.popper = popper;\n\n  return data;\n}\n","/**\n * @function\n * @memberof Modifiers\n * @argument {Object} data - The data object generated by update method\n * @argument {Object} options - Modifiers configuration and options\n * @returns {Object} The data object, properly modified\n */\nexport default function keepTogether(data) {\n  const { popper, reference } = data.offsets;\n  const placement = data.placement.split('-')[0];\n  const floor = Math.floor;\n  const isVertical = ['top', 'bottom'].indexOf(placement) !== -1;\n  const side = isVertical ? 'right' : 'bottom';\n  const opSide = isVertical ? 'left' : 'top';\n  const measurement = isVertical ? 'width' : 'height';\n\n  if (popper[side] < floor(reference[opSide])) {\n    data.offsets.popper[opSide] =\n      floor(reference[opSide]) - popper[measurement];\n  }\n  if (popper[opSide] > floor(reference[side])) {\n    data.offsets.popper[opSide] = floor(reference[side]);\n  }\n\n  return data;\n}\n","import getClientRect from '../utils/getClientRect';\nimport getOppositePlacement from '../utils/getOppositePlacement';\n\n/**\n * @function\n * @memberof Modifiers\n * @argument {Object} data - The data object generated by `update` method\n * @argument {Object} options - Modifiers configuration and options\n * @returns {Object} The data object, properly modified\n */\nexport default function inner(data) {\n  const placement = data.placement;\n  const basePlacement = placement.split('-')[0];\n  const { popper, reference } = data.offsets;\n  const isHoriz = ['left', 'right'].indexOf(basePlacement) !== -1;\n\n  const subtractLength = ['top', 'left'].indexOf(basePlacement) === -1;\n\n  popper[isHoriz ? 'left' : 'top'] =\n    reference[basePlacement] -\n    (subtractLength ? popper[isHoriz ? 'width' : 'height'] : 0);\n\n  data.placement = getOppositePlacement(placement);\n  data.offsets.popper = getClientRect(popper);\n\n  return data;\n}\n","import isModifierRequired from '../utils/isModifierRequired';\nimport find from '../utils/find';\n\n/**\n * @function\n * @memberof Modifiers\n * @argument {Object} data - The data object generated by update method\n * @argument {Object} options - Modifiers configuration and options\n * @returns {Object} The data object, properly modified\n */\nexport default function hide(data) {\n  if (!isModifierRequired(data.instance.modifiers, 'hide', 'preventOverflow')) {\n    return data;\n  }\n\n  const refRect = data.offsets.reference;\n  const bound = find(\n    data.instance.modifiers,\n    modifier => modifier.name === 'preventOverflow'\n  ).boundaries;\n\n  if (\n    refRect.bottom < bound.top ||\n    refRect.left > bound.right ||\n    refRect.top > bound.bottom ||\n    refRect.right < bound.left\n  ) {\n    // Avoid unnecessary DOM access if visibility hasn't changed\n    if (data.hide === true) {\n      return data;\n    }\n\n    data.hide = true;\n    data.attributes['x-out-of-boundaries'] = '';\n  } else {\n    // Avoid unnecessary DOM access if visibility hasn't changed\n    if (data.hide === false) {\n      return data;\n    }\n\n    data.hide = false;\n    data.attributes['x-out-of-boundaries'] = false;\n  }\n\n  return data;\n}\n","import setStyles from '../utils/setStyles';\nimport setAttributes from '../utils/setAttributes';\nimport getReferenceOffsets from '../utils/getReferenceOffsets';\nimport computeAutoPlacement from '../utils/computeAutoPlacement';\n\n/**\n * @function\n * @memberof Modifiers\n * @argument {Object} data - The data object generated by `update` method\n * @argument {Object} data.styles - List of style properties - values to apply to popper element\n * @argument {Object} data.attributes - List of attribute properties - values to apply to popper element\n * @argument {Object} options - Modifiers configuration and options\n * @returns {Object} The same data object\n */\nexport default function applyStyle(data) {\n  // any property present in `data.styles` will be applied to the popper,\n  // in this way we can make the 3rd party modifiers add custom styles to it\n  // Be aware, modifiers could override the properties defined in the previous\n  // lines of this modifier!\n  setStyles(data.instance.popper, data.styles);\n\n  // any property present in `data.attributes` will be applied to the popper,\n  // they will be set as HTML attributes of the element\n  setAttributes(data.instance.popper, data.attributes);\n\n  // if arrowElement is defined and arrowStyles has some properties\n  if (data.arrowElement && Object.keys(data.arrowStyles).length) {\n    setStyles(data.arrowElement, data.arrowStyles);\n  }\n\n  return data;\n}\n\n/**\n * Set the x-placement attribute before everything else because it could be used\n * to add margins to the popper margins needs to be calculated to get the\n * correct popper offsets.\n * @method\n * @memberof Popper.modifiers\n * @param {HTMLElement} reference - The reference element used to position the popper\n * @param {HTMLElement} popper - The HTML element used as popper\n * @param {Object} options - Popper.js options\n */\nexport function applyStyleOnLoad(\n  reference,\n  popper,\n  options,\n  modifierOptions,\n  state\n) {\n  // compute reference element offsets\n  const referenceOffsets = getReferenceOffsets(state, popper, reference, options.positionFixed);\n\n  // compute auto placement, store placement inside the data object,\n  // modifiers will be able to edit `placement` if needed\n  // and refer to originalPlacement to know the original value\n  const placement = computeAutoPlacement(\n    options.placement,\n    referenceOffsets,\n    popper,\n    reference,\n    options.modifiers.flip.boundariesElement,\n    options.modifiers.flip.padding\n  );\n\n  popper.setAttribute('x-placement', placement);\n\n  // Apply `position` to popper before anything else because\n  // without the position applied we can't guarantee correct computations\n  setStyles(popper, { position: options.positionFixed ? 'fixed' : 'absolute' });\n\n  return 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\ No newline at end of file
diff --git a/templates/layouts/master.html b/templates/layouts/master.html
index 38115cc..bc1c221 100644
--- a/templates/layouts/master.html
+++ b/templates/layouts/master.html
@@ -64,7 +64,7 @@
 <script src="/public/jquery-3.4.1.min.js"
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 <script src="/public/popper.min.js"
-        integrity="sha384-6+mhtAMoBt151CjeC/4YSoc+hUI6FywidAsP43/ZPaFwF3VozW7dP/TXe+v0iV5E"></script>
+        integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo"></script>
 <script src="/public/bootstrap.min.js"
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 {{ template "footer_script" . }}