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(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
typeof define === 'function' && define.amd ? define(factory) :
(global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.Popper = factory());
}(this, (function () { 'use strict';
var isBrowser = typeof window !== 'undefined' && typeof document !== 'undefined' && typeof navigator !== 'undefined';
var timeoutDuration = (function(){
var longerTimeoutBrowsers = ['Edge', 'Trident', 'Firefox'];
for (var i = 0; i < longerTimeoutBrowsers.length; i += 1) {
if (isBrowser && navigator.userAgent.indexOf(longerTimeoutBrowsers[i]) >= 0) {
return 1;
}
}
return 0;
}());
function microtaskDebounce(fn) {
var called = false;
return function () {
if (called) {
return
}
called = true;
window.Promise.resolve().then(function () {
called = false;
fn();
});
}
}
function taskDebounce(fn) {
var scheduled = false;
return function () {
if (!scheduled) {
scheduled = true;
setTimeout(function () {
scheduled = false;
fn();
}, timeoutDuration);
}
};
}
var supportsMicroTasks = isBrowser && window.Promise;
/**
* Create a debounced version of a method, that's asynchronously deferred
* but called in the minimum time possible.
*
* @method
* @memberof Popper.Utils
* @argument {Function} fn
* @returns {Function}
*/
var debounce = (supportsMicroTasks
? microtaskDebounce
: taskDebounce);
/**
* Check if the given variable is a function
* @method
* @memberof Popper.Utils
* @argument {Any} functionToCheck - variable to check
* @returns {Boolean} answer to: is a function?
*/
function isFunction(functionToCheck) {
var getType = {};
return (
functionToCheck &&
getType.toString.call(functionToCheck) === '[object Function]'
);
}
/**
* Get CSS computed property of the given element
* @method
* @memberof Popper.Utils
* @argument {Eement} element
* @argument {String} property
*/
function getStyleComputedProperty(element, property) {
if (element.nodeType !== 1) {
return [];
}
// NOTE: 1 DOM access here
var window = element.ownerDocument.defaultView;
var css = window.getComputedStyle(element, null);
return property ? css[property] : css;
}
/**
* Returns the parentNode or the host of the element
* @method
* @memberof Popper.Utils
* @argument {Element} element
* @returns {Element} parent
*/
function getParentNode(element) {
if (element.nodeName === 'HTML') {
return element;
}
return element.parentNode || element.host;
}
/**
* Returns the scrolling parent of the given element
* @method
* @memberof Popper.Utils
* @argument {Element} element
* @returns {Element} scroll parent
*/
function getScrollParent(element) {
// Return body, `getScroll` will take care to get the correct `scrollTop` from it
if (!element) {
return document.body
}
switch (element.nodeName) {
case 'HTML':
case 'BODY':
return element.ownerDocument.body
case '#document':
return element.body
}
// Firefox want us to check `-x` and `-y` variations as well
var ref = getStyleComputedProperty(element);
var overflow = ref.overflow;
var overflowX = ref.overflowX;
var overflowY = ref.overflowY;
if (/(auto|scroll|overlay)/.test(overflow + overflowY + overflowX)) {
return element;
}
return getScrollParent(getParentNode(element));
}
/**
* Returns the reference node of the reference object, or the reference object itself.
* @method
* @memberof Popper.Utils
* @param {Element|Object} reference - the reference element (the popper will be relative to this)
* @returns {Element} parent
*/
function getReferenceNode(reference) {
return reference && reference.referenceNode ? reference.referenceNode : reference;
}
var isIE11 = isBrowser && !!(window.MSInputMethodContext && document.documentMode);
var isIE10 = isBrowser && /MSIE 10/.test(navigator.userAgent);
/**
* Determines if the browser is Internet Explorer
* @method
* @memberof Popper.Utils
* @param {Number} version to check
* @returns {Boolean} isIE
*/
function isIE(version) {
if (version === 11) {
return isIE11;
}
if (version === 10) {
return isIE10;
}
return isIE11 || isIE10;
}
/**
* Returns the offset parent of the given element
* @method
* @memberof Popper.Utils
* @argument {Element} element
* @returns {Element} offset parent
*/
function getOffsetParent(element) {
if (!element) {
return document.documentElement;
}
var noOffsetParent = isIE(10) ? document.body : null;
// NOTE: 1 DOM access here
var offsetParent = element.offsetParent || null;
// Skip hidden elements which don't have an offsetParent
while (offsetParent === noOffsetParent && element.nextElementSibling) {
offsetParent = (element = element.nextElementSibling).offsetParent;
}
var nodeName = offsetParent && offsetParent.nodeName;
if (!nodeName || nodeName === 'BODY' || nodeName === 'HTML') {
return element ? element.ownerDocument.documentElement : document.documentElement;
}
// .offsetParent will return the closest TH, TD or TABLE in case
// no offsetParent is present, I hate this job...
if (
['TH', 'TD', 'TABLE'].indexOf(offsetParent.nodeName) !== -1 &&
getStyleComputedProperty(offsetParent, 'position') === 'static'
) {
return getOffsetParent(offsetParent);
}
return offsetParent;
}
function isOffsetContainer(element) {
var nodeName = element.nodeName;
if (nodeName === 'BODY') {
return false;
}
return (
nodeName === 'HTML' || getOffsetParent(element.firstElementChild) === element
);
}
/**
* Finds the root node (document, shadowDOM root) of the given element
* @method
* @memberof Popper.Utils
* @argument {Element} node
* @returns {Element} root node
*/
function getRoot(node) {
if (node.parentNode !== null) {
return getRoot(node.parentNode);
}
return node;
}
/**
* Finds the offset parent common to the two provided nodes
* @method
* @memberof Popper.Utils
* @argument {Element} element1
* @argument {Element} element2
* @returns {Element} common offset parent
*/
function findCommonOffsetParent(element1, element2) {
// This check is needed to avoid errors in case one of the elements isn't defined for any reason
if (!element1 || !element1.nodeType || !element2 || !element2.nodeType) {
return document.documentElement;
}
// Here we make sure to give as "start" the element that comes first in the DOM
var order =
element1.compareDocumentPosition(element2) &
Node.DOCUMENT_POSITION_FOLLOWING;
var start = order ? element1 : element2;
var end = order ? element2 : element1;
// Get common ancestor container
var range = document.createRange();
range.setStart(start, 0);
range.setEnd(end, 0);
var commonAncestorContainer = range.commonAncestorContainer;
// Both nodes are inside #document
if (
(element1 !== commonAncestorContainer &&
element2 !== commonAncestorContainer) ||
start.contains(end)
) {
if (isOffsetContainer(commonAncestorContainer)) {
return commonAncestorContainer;
}
return getOffsetParent(commonAncestorContainer);
}
// one of the nodes is inside shadowDOM, find which one
var element1root = getRoot(element1);
if (element1root.host) {
return findCommonOffsetParent(element1root.host, element2);
} else {
return findCommonOffsetParent(element1, getRoot(element2).host);
}
}
/**
* Gets the scroll value of the given element in the given side (top and left)
* @method
* @memberof Popper.Utils
* @argument {Element} element
* @argument {String} side `top` or `left`
* @returns {number} amount of scrolled pixels
*/
function getScroll(element, side) {
if ( side === void 0 ) side = 'top';
var upperSide = side === 'top' ? 'scrollTop' : 'scrollLeft';
var nodeName = element.nodeName;
if (nodeName === 'BODY' || nodeName === 'HTML') {
var html = element.ownerDocument.documentElement;
var scrollingElement = element.ownerDocument.scrollingElement || html;
return scrollingElement[upperSide];
}
return element[upperSide];
}
/*
* Sum or subtract the element scroll values (left and top) from a given rect object
* @method
* @memberof Popper.Utils
* @param {Object} rect - Rect object you want to change
* @param {HTMLElement} element - The element from the function reads the scroll values
* @param {Boolean} subtract - set to true if you want to subtract the scroll values
* @return {Object} rect - The modifier rect object
*/
function includeScroll(rect, element, subtract) {
if ( subtract === void 0 ) subtract = false;
var scrollTop = getScroll(element, 'top');
var scrollLeft = getScroll(element, 'left');
var modifier = subtract ? -1 : 1;
rect.top += scrollTop * modifier;
rect.bottom += scrollTop * modifier;
rect.left += scrollLeft * modifier;
rect.right += scrollLeft * modifier;
return rect;
}
/*
* Helper to detect borders of a given element
* @method
* @memberof Popper.Utils
* @param {CSSStyleDeclaration} styles
* Result of `getStyleComputedProperty` on the given element
* @param {String} axis - `x` or `y`
* @return {number} borders - The borders size of the given axis
*/
function getBordersSize(styles, axis) {
var sideA = axis === 'x' ? 'Left' : 'Top';
var sideB = sideA === 'Left' ? 'Right' : 'Bottom';
return (
parseFloat(styles[("border" + sideA + "Width")]) +
parseFloat(styles[("border" + sideB + "Width")])
);
}
function getSize(axis, body, html, computedStyle) {
return Math.max(
body[("offset" + axis)],
body[("scroll" + axis)],
html[("client" + axis)],
html[("offset" + axis)],
html[("scroll" + axis)],
isIE(10)
? (parseInt(html[("offset" + axis)]) +
parseInt(computedStyle[("margin" + (axis === 'Height' ? 'Top' : 'Left'))]) +
parseInt(computedStyle[("margin" + (axis === 'Height' ? 'Bottom' : 'Right'))]))
: 0
);
}
function getWindowSizes(document) {
var body = document.body;
var html = document.documentElement;
var computedStyle = isIE(10) && getComputedStyle(html);
return {
height: getSize('Height', body, html, computedStyle),
width: getSize('Width', body, html, computedStyle),
};
}
/**
* Given element offsets, generate an output similar to getBoundingClientRect
* @method
* @memberof Popper.Utils
* @argument {Object} offsets
* @returns {Object} ClientRect like output
*/
function getClientRect(offsets) {
return Object.assign({}, offsets,
{right: offsets.left + offsets.width,
bottom: offsets.top + offsets.height});
}
/**
* Get bounding client rect of given element
* @method
* @memberof Popper.Utils
* @param {HTMLElement} element
* @return {Object} client rect
*/
function getBoundingClientRect(element) {
var rect = {};
// IE10 10 FIX: Please, don't ask, the element isn't
// considered in DOM in some circumstances...
// This isn't reproducible in IE10 compatibility mode of IE11
try {
if (isIE(10)) {
rect = element.getBoundingClientRect();
var scrollTop = getScroll(element, 'top');
var scrollLeft = getScroll(element, 'left');
rect.top += scrollTop;
rect.left += scrollLeft;
rect.bottom += scrollTop;
rect.right += scrollLeft;
}
else {
rect = element.getBoundingClientRect();
}
}
catch(e){}
var result = {
left: rect.left,
top: rect.top,
width: rect.right - rect.left,
height: rect.bottom - rect.top,
};
// subtract scrollbar size from sizes
var sizes = element.nodeName === 'HTML' ? getWindowSizes(element.ownerDocument) : {};
var width =
sizes.width || element.clientWidth || result.width;
var height =
sizes.height || element.clientHeight || result.height;
var horizScrollbar = element.offsetWidth - width;
var vertScrollbar = element.offsetHeight - height;
// if an hypothetical scrollbar is detected, we must be sure it's not a `border`
// we make this check conditional for performance reasons
if (horizScrollbar || vertScrollbar) {
var styles = getStyleComputedProperty(element);
horizScrollbar -= getBordersSize(styles, 'x');
vertScrollbar -= getBordersSize(styles, 'y');
result.width -= horizScrollbar;
result.height -= vertScrollbar;
}
return getClientRect(result);
}
function getOffsetRectRelativeToArbitraryNode(children, parent, fixedPosition) {
if ( fixedPosition === void 0 ) fixedPosition = false;
var isIE10 = isIE(10);
var isHTML = parent.nodeName === 'HTML';
var childrenRect = getBoundingClientRect(children);
var parentRect = getBoundingClientRect(parent);
var scrollParent = getScrollParent(children);
var styles = getStyleComputedProperty(parent);
var borderTopWidth = parseFloat(styles.borderTopWidth);
var borderLeftWidth = parseFloat(styles.borderLeftWidth);
// In cases where the parent is fixed, we must ignore negative scroll in offset calc
if(fixedPosition && isHTML) {
parentRect.top = Math.max(parentRect.top, 0);
parentRect.left = Math.max(parentRect.left, 0);
}
var offsets = getClientRect({
top: childrenRect.top - parentRect.top - borderTopWidth,
left: childrenRect.left - parentRect.left - borderLeftWidth,
width: childrenRect.width,
height: childrenRect.height,
});
offsets.marginTop = 0;
offsets.marginLeft = 0;
// Subtract margins of documentElement in case it's being used as parent
// we do this only on HTML because it's the only element that behaves
// differently when margins are applied to it. The margins are included in
// the box of the documentElement, in the other cases not.
if (!isIE10 && isHTML) {
var marginTop = parseFloat(styles.marginTop);
var marginLeft = parseFloat(styles.marginLeft);
offsets.top -= borderTopWidth - marginTop;
offsets.bottom -= borderTopWidth - marginTop;
offsets.left -= borderLeftWidth - marginLeft;
offsets.right -= borderLeftWidth - marginLeft;
// Attach marginTop and marginLeft because in some circumstances we may need them
offsets.marginTop = marginTop;
offsets.marginLeft = marginLeft;
}
if (
isIE10 && !fixedPosition
? parent.contains(scrollParent)
: parent === scrollParent && scrollParent.nodeName !== 'BODY'
) {
offsets = includeScroll(offsets, parent);
}
return offsets;
}
function getViewportOffsetRectRelativeToArtbitraryNode(element, excludeScroll) {
if ( excludeScroll === void 0 ) excludeScroll = false;
var html = element.ownerDocument.documentElement;
var relativeOffset = getOffsetRectRelativeToArbitraryNode(element, html);
var width = Math.max(html.clientWidth, window.innerWidth || 0);
var height = Math.max(html.clientHeight, window.innerHeight || 0);
var scrollTop = !excludeScroll ? getScroll(html) : 0;
var scrollLeft = !excludeScroll ? getScroll(html, 'left') : 0;
var offset = {
top: scrollTop - relativeOffset.top + relativeOffset.marginTop,
left: scrollLeft - relativeOffset.left + relativeOffset.marginLeft,
width: width,
height: height,
};
return getClientRect(offset);
}
/**
* Check if the given element is fixed or is inside a fixed parent
* @method
* @memberof Popper.Utils
* @argument {Element} element
* @argument {Element} customContainer
* @returns {Boolean} answer to "isFixed?"
*/
function isFixed(element) {
var nodeName = element.nodeName;
if (nodeName === 'BODY' || nodeName === 'HTML') {
return false;
}
if (getStyleComputedProperty(element, 'position') === 'fixed') {
return true;
}
var parentNode = getParentNode(element);
if (!parentNode) {
return false;
}
return isFixed(parentNode);
}
/**
* Finds the first parent of an element that has a transformed property defined
* @method
* @memberof Popper.Utils
* @argument {Element} element
* @returns {Element} first transformed parent or documentElement
*/
function getFixedPositionOffsetParent(element) {
// This check is needed to avoid errors in case one of the elements isn't defined for any reason
if (!element || !element.parentElement || isIE()) {
return document.documentElement;
}
var el = element.parentElement;
while (el && getStyleComputedProperty(el, 'transform') === 'none') {
el = el.parentElement;
}
return el || document.documentElement;
}
/**
* Computed the boundaries limits and return them
* @method
* @memberof Popper.Utils
* @param {HTMLElement} popper
* @param {HTMLElement} reference
* @param {number} padding
* @param {HTMLElement} boundariesElement - Element used to define the boundaries
* @param {Boolean} fixedPosition - Is in fixed position mode
* @returns {Object} Coordinates of the boundaries
*/
function getBoundaries(
popper,
reference,
padding,
boundariesElement,
fixedPosition
) {
if ( fixedPosition === void 0 ) fixedPosition = false;
// NOTE: 1 DOM access here
var boundaries = { top: 0, left: 0 };
var offsetParent = fixedPosition ? getFixedPositionOffsetParent(popper) : findCommonOffsetParent(popper, getReferenceNode(reference));
// Handle viewport case
if (boundariesElement === 'viewport' ) {
boundaries = getViewportOffsetRectRelativeToArtbitraryNode(offsetParent, fixedPosition);
}
else {
// Handle other cases based on DOM element used as boundaries
var boundariesNode;
if (boundariesElement === 'scrollParent') {
boundariesNode = getScrollParent(getParentNode(reference));
if (boundariesNode.nodeName === 'BODY') {
boundariesNode = popper.ownerDocument.documentElement;
}
} else if (boundariesElement === 'window') {
boundariesNode = popper.ownerDocument.documentElement;
} else {
boundariesNode = boundariesElement;
}
var offsets = getOffsetRectRelativeToArbitraryNode(
boundariesNode,
offsetParent,
fixedPosition
);
// In case of HTML, we need a different computation
if (boundariesNode.nodeName === 'HTML' && !isFixed(offsetParent)) {
var ref = getWindowSizes(popper.ownerDocument);
var height = ref.height;
var width = ref.width;
boundaries.top += offsets.top - offsets.marginTop;
boundaries.bottom = height + offsets.top;
boundaries.left += offsets.left - offsets.marginLeft;
boundaries.right = width + offsets.left;
} else {
// for all the other DOM elements, this one is good
boundaries = offsets;
}
}
// Add paddings
padding = padding || 0;
var isPaddingNumber = typeof padding === 'number';
boundaries.left += isPaddingNumber ? padding : padding.left || 0;
boundaries.top += isPaddingNumber ? padding : padding.top || 0;
boundaries.right -= isPaddingNumber ? padding : padding.right || 0;
boundaries.bottom -= isPaddingNumber ? padding : padding.bottom || 0;
return boundaries;
}
function getArea(ref) {
var width = ref.width;
var height = ref.height;
return width * height;
}
/**
* Utility used to transform the `auto` placement to the placement with more
* available space.
* @method
* @memberof Popper.Utils
* @argument {Object} data - The data object generated by update method
* @argument {Object} options - Modifiers configuration and options
* @returns {Object} The data object, properly modified
*/
function computeAutoPlacement(
placement,
refRect,
popper,
reference,
boundariesElement,
padding
) {
if ( padding === void 0 ) padding = 0;
if (placement.indexOf('auto') === -1) {
return placement;
}
var boundaries = getBoundaries(
popper,
reference,
padding,
boundariesElement
);
var rects = {
top: {
width: boundaries.width,
height: refRect.top - boundaries.top,
},
right: {
width: boundaries.right - refRect.right,
height: boundaries.height,
},
bottom: {
width: boundaries.width,
height: boundaries.bottom - refRect.bottom,
},
left: {
width: refRect.left - boundaries.left,
height: boundaries.height,
},
};
var sortedAreas = Object.keys(rects)
.map(function (key) { return (Object.assign({}, {key: key},
rects[key],
{area: getArea(rects[key])})); })
.sort(function (a, b) { return b.area - a.area; });
var filteredAreas = sortedAreas.filter(
function (ref) {
var width = ref.width;
var height = ref.height;
return width >= popper.clientWidth && height >= popper.clientHeight;
}
);
var computedPlacement = filteredAreas.length > 0
? filteredAreas[0].key
: sortedAreas[0].key;
var variation = placement.split('-')[1];
return computedPlacement + (variation ? ("-" + variation) : '');
}
/**
* Get offsets to the reference element
* @method
* @memberof Popper.Utils
* @param {Object} state
* @param {Element} popper - the popper element
* @param {Element} reference - the reference element (the popper will be relative to this)
* @param {Element} fixedPosition - is in fixed position mode
* @returns {Object} An object containing the offsets which will be applied to the popper
*/
function getReferenceOffsets(state, popper, reference, fixedPosition) {
if ( fixedPosition === void 0 ) fixedPosition = null;
var commonOffsetParent = fixedPosition ? getFixedPositionOffsetParent(popper) : findCommonOffsetParent(popper, getReferenceNode(reference));
return getOffsetRectRelativeToArbitraryNode(reference, commonOffsetParent, fixedPosition);
}
/**
* Get the outer sizes of the given element (offset size + margins)
* @method
* @memberof Popper.Utils
* @argument {Element} element
* @returns {Object} object containing width and height properties
*/
function getOuterSizes(element) {
var window = element.ownerDocument.defaultView;
var styles = window.getComputedStyle(element);
var x = parseFloat(styles.marginTop || 0) + parseFloat(styles.marginBottom || 0);
var y = parseFloat(styles.marginLeft || 0) + parseFloat(styles.marginRight || 0);
var result = {
width: element.offsetWidth + y,
height: element.offsetHeight + x,
};
return result;
}
/**
* Get the opposite placement of the given one
* @method
* @memberof Popper.Utils
* @argument {String} placement
* @returns {String} flipped placement
*/
function getOppositePlacement(placement) {
var hash = { left: 'right', right: 'left', bottom: 'top', top: 'bottom' };
return placement.replace(/left|right|bottom|top/g, function (matched) { return hash[matched]; });
}
/**
* Get offsets to the popper
* @method
* @memberof Popper.Utils
* @param {Object} position - CSS position the Popper will get applied
* @param {HTMLElement} popper - the popper element
* @param {Object} referenceOffsets - the reference offsets (the popper will be relative to this)
* @param {String} placement - one of the valid placement options
* @returns {Object} popperOffsets - An object containing the offsets which will be applied to the popper
*/
function getPopperOffsets(popper, referenceOffsets, placement) {
placement = placement.split('-')[0];
// Get popper node sizes
var popperRect = getOuterSizes(popper);
// Add position, width and height to our offsets object
var popperOffsets = {
width: popperRect.width,
height: popperRect.height,
};
// depending by the popper placement we have to compute its offsets slightly differently
var isHoriz = ['right', 'left'].indexOf(placement) !== -1;
var mainSide = isHoriz ? 'top' : 'left';
var secondarySide = isHoriz ? 'left' : 'top';
var measurement = isHoriz ? 'height' : 'width';
var secondaryMeasurement = !isHoriz ? 'height' : 'width';
popperOffsets[mainSide] =
referenceOffsets[mainSide] +
referenceOffsets[measurement] / 2 -
popperRect[measurement] / 2;
if (placement === secondarySide) {
popperOffsets[secondarySide] =
referenceOffsets[secondarySide] - popperRect[secondaryMeasurement];
} else {
popperOffsets[secondarySide] =
referenceOffsets[getOppositePlacement(secondarySide)];
}
return popperOffsets;
}
/**
* Mimics the `find` method of Array
* @method
* @memberof Popper.Utils
* @argument {Array} arr
* @argument prop
* @argument value
* @returns index or -1
*/
function find(arr, check) {
// use native find if supported
if (Array.prototype.find) {
return arr.find(check);
}
// use `filter` to obtain the same behavior of `find`
return arr.filter(check)[0];
}
/**
* Return the index of the matching object
* @method
* @memberof Popper.Utils
* @argument {Array} arr
* @argument prop
* @argument value
* @returns index or -1
*/
function findIndex(arr, prop, value) {
// use native findIndex if supported
if (Array.prototype.findIndex) {
return arr.findIndex(function (cur) { return cur[prop] === value; });
}
// use `find` + `indexOf` if `findIndex` isn't supported
var match = find(arr, function (obj) { return obj[prop] === value; });
return arr.indexOf(match);
}
/**
* Loop trough the list of modifiers and run them in order,
* each of them will then edit the data object.
* @method
* @memberof Popper.Utils
* @param {dataObject} data
* @param {Array} modifiers
* @param {String} ends - Optional modifier name used as stopper
* @returns {dataObject}
*/
function runModifiers(modifiers, data, ends) {
var modifiersToRun = ends === undefined
? modifiers
: modifiers.slice(0, findIndex(modifiers, 'name', ends));
modifiersToRun.forEach(function (modifier) {
if (modifier['function']) { // eslint-disable-line dot-notation
console.warn('`modifier.function` is deprecated, use `modifier.fn`!');
}
var fn = modifier['function'] || modifier.fn; // eslint-disable-line dot-notation
if (modifier.enabled && isFunction(fn)) {
// Add properties to offsets to make them a complete clientRect object
// we do this before each modifier to make sure the previous one doesn't
// mess with these values
data.offsets.popper = getClientRect(data.offsets.popper);
data.offsets.reference = getClientRect(data.offsets.reference);
data = fn(data, modifier);
}
});
return data;
}
/**
* Updates the position of the popper, computing the new offsets and applying
* the new style.<br />
* Prefer `scheduleUpdate` over `update` because of performance reasons.
* @method
* @memberof Popper
*/
function update() {
// if popper is destroyed, don't perform any further update
if (this.state.isDestroyed) {
return;
}
var data = {
instance: this,
styles: {},
arrowStyles: {},
attributes: {},
flipped: false,
offsets: {},
};
// compute reference element offsets
data.offsets.reference = getReferenceOffsets(
this.state,
this.popper,
this.reference,
this.options.positionFixed
);
// compute auto placement, store placement inside the data object,
// modifiers will be able to edit `placement` if needed
// and refer to originalPlacement to know the original value
data.placement = computeAutoPlacement(
this.options.placement,
data.offsets.reference,
this.popper,
this.reference,
this.options.modifiers.flip.boundariesElement,
this.options.modifiers.flip.padding
);
// store the computed placement inside `originalPlacement`
data.originalPlacement = data.placement;
data.positionFixed = this.options.positionFixed;
// compute the popper offsets
data.offsets.popper = getPopperOffsets(
this.popper,
data.offsets.reference,
data.placement
);
data.offsets.popper.position = this.options.positionFixed
? 'fixed'
: 'absolute';
// run the modifiers
data = runModifiers(this.modifiers, data);
// the first `update` will call `onCreate` callback
// the other ones will call `onUpdate` callback
if (!this.state.isCreated) {
this.state.isCreated = true;
this.options.onCreate(data);
} else {
this.options.onUpdate(data);
}
}
/**
* Helper used to know if the given modifier is enabled.
* @method
* @memberof Popper.Utils
* @returns {Boolean}
*/
function isModifierEnabled(modifiers, modifierName) {
return modifiers.some(
function (ref) {
var name = ref.name;
var enabled = ref.enabled;
return enabled && name === modifierName;
}
);
}
/**
* Get the prefixed supported property name
* @method
* @memberof Popper.Utils
* @argument {String} property (camelCase)
* @returns {String} prefixed property (camelCase or PascalCase, depending on the vendor prefix)
*/
function getSupportedPropertyName(property) {
var prefixes = [false, 'ms', 'Webkit', 'Moz', 'O'];
var upperProp = property.charAt(0).toUpperCase() + property.slice(1);
for (var i = 0; i < prefixes.length; i++) {
var prefix = prefixes[i];
var toCheck = prefix ? ("" + prefix + upperProp) : property;
if (typeof document.body.style[toCheck] !== 'undefined') {
return toCheck;
}
}
return null;
}
/**
* Destroys the popper.
* @method
* @memberof Popper
*/
function destroy() {
this.state.isDestroyed = true;
// touch DOM only if `applyStyle` modifier is enabled
if (isModifierEnabled(this.modifiers, 'applyStyle')) {
this.popper.removeAttribute('x-placement');
this.popper.style.position = '';
this.popper.style.top = '';
this.popper.style.left = '';
this.popper.style.right = '';
this.popper.style.bottom = '';
this.popper.style.willChange = '';
this.popper.style[getSupportedPropertyName('transform')] = '';
}
this.disableEventListeners();
// remove the popper if user explicitly asked for the deletion on destroy
// do not use `remove` because IE11 doesn't support it
if (this.options.removeOnDestroy) {
this.popper.parentNode.removeChild(this.popper);
}
return this;
}
/**
* Get the window associated with the element
* @argument {Element} element
* @returns {Window}
*/
function getWindow(element) {
var ownerDocument = element.ownerDocument;
return ownerDocument ? ownerDocument.defaultView : window;
}
function attachToScrollParents(scrollParent, event, callback, scrollParents) {
var isBody = scrollParent.nodeName === 'BODY';
var target = isBody ? scrollParent.ownerDocument.defaultView : scrollParent;
target.addEventListener(event, callback, { passive: true });
if (!isBody) {
attachToScrollParents(
getScrollParent(target.parentNode),
event,
callback,
scrollParents
);
}
scrollParents.push(target);
}
/**
* Setup needed event listeners used to update the popper position
* @method
* @memberof Popper.Utils
* @private
*/
function setupEventListeners(
reference,
options,
state,
updateBound
) {
// Resize event listener on window
state.updateBound = updateBound;
getWindow(reference).addEventListener('resize', state.updateBound, { passive: true });
// Scroll event listener on scroll parents
var scrollElement = getScrollParent(reference);
attachToScrollParents(
scrollElement,
'scroll',
state.updateBound,
state.scrollParents
);
state.scrollElement = scrollElement;
state.eventsEnabled = true;
return state;
}
/**
* It will add resize/scroll events and start recalculating
* position of the popper element when they are triggered.
* @method
* @memberof Popper
*/
function enableEventListeners() {
if (!this.state.eventsEnabled) {
this.state = setupEventListeners(
this.reference,
this.options,
this.state,
this.scheduleUpdate
);
}
}
/**
* Remove event listeners used to update the popper position
* @method
* @memberof Popper.Utils
* @private
*/
function removeEventListeners(reference, state) {
// Remove resize event listener on window
getWindow(reference).removeEventListener('resize', state.updateBound);
// Remove scroll event listener on scroll parents
state.scrollParents.forEach(function (target) {
target.removeEventListener('scroll', state.updateBound);
});
// Reset state
state.updateBound = null;
state.scrollParents = [];
state.scrollElement = null;
state.eventsEnabled = false;
return state;
}
/**
* It will remove resize/scroll events and won't recalculate popper position
* when they are triggered. It also won't trigger `onUpdate` callback anymore,
* unless you call `update` method manually.
* @method
* @memberof Popper
*/
function disableEventListeners() {
if (this.state.eventsEnabled) {
cancelAnimationFrame(this.scheduleUpdate);
this.state = removeEventListeners(this.reference, this.state);
}
}
/**
* Tells if a given input is a number
* @method
* @memberof Popper.Utils
* @param {*} input to check
* @return {Boolean}
*/
function isNumeric(n) {
return n !== '' && !isNaN(parseFloat(n)) && isFinite(n);
}
/**
* Set the style to the given popper
* @method
* @memberof Popper.Utils
* @argument {Element} element - Element to apply the style to
* @argument {Object} styles
* Object with a list of properties and values which will be applied to the element
*/
function setStyles(element, styles) {
Object.keys(styles).forEach(function (prop) {
var unit = '';
// add unit if the value is numeric and is one of the following
if (
['width', 'height', 'top', 'right', 'bottom', 'left'].indexOf(prop) !==
-1 &&
isNumeric(styles[prop])
) {
unit = 'px';
}
element.style[prop] = styles[prop] + unit;
});
}
/**
* Set the attributes to the given popper
* @method
* @memberof Popper.Utils
* @argument {Element} element - Element to apply the attributes to
* @argument {Object} styles
* Object with a list of properties and values which will be applied to the element
*/
function setAttributes(element, attributes) {
Object.keys(attributes).forEach(function(prop) {
var value = attributes[prop];
if (value !== false) {
element.setAttribute(prop, attributes[prop]);
} else {
element.removeAttribute(prop);
}
});
}
/**
* @function
* @memberof Modifiers
* @argument {Object} data - The data object generated by `update` method
* @argument {Object} data.styles - List of style properties - values to apply to popper element
* @argument {Object} data.attributes - List of attribute properties - values to apply to popper element
* @argument {Object} options - Modifiers configuration and options
* @returns {Object} The same data object
*/
function applyStyle(data) {
// any property present in `data.styles` will be applied to the popper,
// in this way we can make the 3rd party modifiers add custom styles to it
// Be aware, modifiers could override the properties defined in the previous
// lines of this modifier!
setStyles(data.instance.popper, data.styles);
// any property present in `data.attributes` will be applied to the popper,
// they will be set as HTML attributes of the element
setAttributes(data.instance.popper, data.attributes);
// if arrowElement is defined and arrowStyles has some properties
if (data.arrowElement && Object.keys(data.arrowStyles).length) {
setStyles(data.arrowElement, data.arrowStyles);
}
return data;
}
/**
* Set the x-placement attribute before everything else because it could be used
* to add margins to the popper margins needs to be calculated to get the
* correct popper offsets.
* @method
* @memberof Popper.modifiers
* @param {HTMLElement} reference - The reference element used to position the popper
* @param {HTMLElement} popper - The HTML element used as popper
* @param {Object} options - Popper.js options
*/
function applyStyleOnLoad(
reference,
popper,
options,
modifierOptions,
state
) {
// compute reference element offsets
var referenceOffsets = getReferenceOffsets(state, popper, reference, options.positionFixed);
// compute auto placement, store placement inside the data object,
// modifiers will be able to edit `placement` if needed
// and refer to originalPlacement to know the original value
var placement = computeAutoPlacement(
options.placement,
referenceOffsets,
popper,
reference,
options.modifiers.flip.boundariesElement,
options.modifiers.flip.padding
);
popper.setAttribute('x-placement', placement);
// Apply `position` to popper before anything else because
// without the position applied we can't guarantee correct computations
setStyles(popper, { position: options.positionFixed ? 'fixed' : 'absolute' });
return options;
}
/**
* @function
* @memberof Popper.Utils
* @argument {Object} data - The data object generated by `update` method
* @argument {Boolean} shouldRound - If the offsets should be rounded at all
* @returns {Object} The popper's position offsets rounded
*
* The tale of pixel-perfect positioning. It's still not 100% perfect, but as
* good as it can be within reason.
* Discussion here: https://github.com/FezVrasta/popper.js/pull/715
*
* Low DPI screens cause a popper to be blurry if not using full pixels (Safari
* as well on High DPI screens).
*
* Firefox prefers no rounding for positioning and does not have blurriness on
* high DPI screens.
*
* Only horizontal placement and left/right values need to be considered.
*/
function getRoundedOffsets(data, shouldRound) {
var ref = data.offsets;
var popper = ref.popper;
var reference = ref.reference;
var round = Math.round;
var floor = Math.floor;
var noRound = function (v) { return v; };
var referenceWidth = round(reference.width);
var popperWidth = round(popper.width);
var isVertical = ['left', 'right'].indexOf(data.placement) !== -1;
var isVariation = data.placement.indexOf('-') !== -1;
var sameWidthParity = referenceWidth % 2 === popperWidth % 2;
var bothOddWidth = referenceWidth % 2 === 1 && popperWidth % 2 === 1;
var horizontalToInteger = !shouldRound
? noRound
: isVertical || isVariation || sameWidthParity
? round
: floor;
var verticalToInteger = !shouldRound ? noRound : round;
return {
left: horizontalToInteger(
bothOddWidth && !isVariation && shouldRound
? popper.left - 1
: popper.left
),
top: verticalToInteger(popper.top),
bottom: verticalToInteger(popper.bottom),
right: horizontalToInteger(popper.right),
};
}
var isFirefox = isBrowser && /Firefox/i.test(navigator.userAgent);
/**
* @function
* @memberof Modifiers
* @argument {Object} data - The data object generated by `update` method
* @argument {Object} options - Modifiers configuration and options
* @returns {Object} The data object, properly modified
*/
function computeStyle(data, options) {
var x = options.x;
var y = options.y;
var ref = data.offsets;
var popper = ref.popper;
// Remove this legacy support in Popper.js v2
var legacyGpuAccelerationOption = find(
data.instance.modifiers,
function (modifier) { return modifier.name === 'applyStyle'; }
).gpuAcceleration;
if (legacyGpuAccelerationOption !== undefined) {
console.warn(
'WARNING: `gpuAcceleration` option moved to `computeStyle` modifier and will not be supported in future versions of Popper.js!'
);
}
var gpuAcceleration =
legacyGpuAccelerationOption !== undefined
? legacyGpuAccelerationOption
: options.gpuAcceleration;
var offsetParent = getOffsetParent(data.instance.popper);
var offsetParentRect = getBoundingClientRect(offsetParent);
// Styles
var styles = {
position: popper.position,
};
var offsets = getRoundedOffsets(
data,
window.devicePixelRatio < 2 || !isFirefox
);
var sideA = x === 'bottom' ? 'top' : 'bottom';
var sideB = y === 'right' ? 'left' : 'right';
// if gpuAcceleration is set to `true` and transform is supported,
// we use `translate3d` to apply the position to the popper we
// automatically use the supported prefixed version if needed
var prefixedProperty = getSupportedPropertyName('transform');
// now, let's make a step back and look at this code closely (wtf?)
// If the content of the popper grows once it's been positioned, it
// may happen that the popper gets misplaced because of the new content
// overflowing its reference element
// To avoid this problem, we provide two options (x and y), which allow
// the consumer to define the offset origin.
// If we position a popper on top of a reference element, we can set
// `x` to `top` to make the popper grow towards its top instead of
// its bottom.
var left, top;
if (sideA === 'bottom') {
// when offsetParent is <html> the positioning is relative to the bottom of the screen (excluding the scrollbar)
// and not the bottom of the html element
if (offsetParent.nodeName === 'HTML') {
top = -offsetParent.clientHeight + offsets.bottom;
} else {
top = -offsetParentRect.height + offsets.bottom;
}
} else {
top = offsets.top;
}
if (sideB === 'right') {
if (offsetParent.nodeName === 'HTML') {
left = -offsetParent.clientWidth + offsets.right;
} else {
left = -offsetParentRect.width + offsets.right;
}
} else {
left = offsets.left;
}
if (gpuAcceleration && prefixedProperty) {
styles[prefixedProperty] = "translate3d(" + left + "px, " + top + "px, 0)";
styles[sideA] = 0;
styles[sideB] = 0;
styles.willChange = 'transform';
} else {
// othwerise, we use the standard `top`, `left`, `bottom` and `right` properties
var invertTop = sideA === 'bottom' ? -1 : 1;
var invertLeft = sideB === 'right' ? -1 : 1;
styles[sideA] = top * invertTop;
styles[sideB] = left * invertLeft;
styles.willChange = sideA + ", " + sideB;
}
// Attributes
var attributes = {
'x-placement': data.placement,
};
// Update `data` attributes, styles and arrowStyles
data.attributes = Object.assign({}, attributes, data.attributes);
data.styles = Object.assign({}, styles, data.styles);
data.arrowStyles = Object.assign({}, data.offsets.arrow, data.arrowStyles);
return data;
}
/**
* Helper used to know if the given modifier depends from another one.<br />
* It checks if the needed modifier is listed and enabled.
* @method
* @memberof Popper.Utils
* @param {Array} modifiers - list of modifiers
* @param {String} requestingName - name of requesting modifier
* @param {String} requestedName - name of requested modifier
* @returns {Boolean}
*/
function isModifierRequired(
modifiers,
requestingName,
requestedName
) {
var requesting = find(modifiers, function (ref) {
var name = ref.name;
return name === requestingName;
});
var isRequired =
!!requesting &&
modifiers.some(function (modifier) {
return (
modifier.name === requestedName &&
modifier.enabled &&
modifier.order < requesting.order
);
});
if (!isRequired) {
var requesting$1 = "`" + requestingName + "`";
var requested = "`" + requestedName + "`";
console.warn(
(requested + " modifier is required by " + requesting$1 + " modifier in order to work, be sure to include it before " + requesting$1 + "!")
);
}
return isRequired;
}
/**
* @function
* @memberof Modifiers
* @argument {Object} data - The data object generated by update method
* @argument {Object} options - Modifiers configuration and options
* @returns {Object} The data object, properly modified
*/
function arrow(data, options) {
var obj;
// arrow depends on keepTogether in order to work
if (!isModifierRequired(data.instance.modifiers, 'arrow', 'keepTogether')) {
return data;
}
var arrowElement = options.element;
// if arrowElement is a string, suppose it's a CSS selector
if (typeof arrowElement === 'string') {
arrowElement = data.instance.popper.querySelector(arrowElement);
// if arrowElement is not found, don't run the modifier
if (!arrowElement) {
return data;
}
} else {
// if the arrowElement isn't a query selector we must check that the
// provided DOM node is child of its popper node
if (!data.instance.popper.contains(arrowElement)) {
console.warn(
'WARNING: `arrow.element` must be child of its popper element!'
);
return data;
}
}
var placement = data.placement.split('-')[0];
var ref = data.offsets;
var popper = ref.popper;
var reference = ref.reference;
var isVertical = ['left', 'right'].indexOf(placement) !== -1;
var len = isVertical ? 'height' : 'width';
var sideCapitalized = isVertical ? 'Top' : 'Left';
var side = sideCapitalized.toLowerCase();
var altSide = isVertical ? 'left' : 'top';
var opSide = isVertical ? 'bottom' : 'right';
var arrowElementSize = getOuterSizes(arrowElement)[len];
//
// extends keepTogether behavior making sure the popper and its
// reference have enough pixels in conjunction
//
// top/left side
if (reference[opSide] - arrowElementSize < popper[side]) {
data.offsets.popper[side] -=
popper[side] - (reference[opSide] - arrowElementSize);
}
// bottom/right side
if (reference[side] + arrowElementSize > popper[opSide]) {
data.offsets.popper[side] +=
reference[side] + arrowElementSize - popper[opSide];
}
data.offsets.popper = getClientRect(data.offsets.popper);
// compute center of the popper
var center = reference[side] + reference[len] / 2 - arrowElementSize / 2;
// Compute the sideValue using the updated popper offsets
// take popper margin in account because we don't have this info available
var css = getStyleComputedProperty(data.instance.popper);
var popperMarginSide = parseFloat(css[("margin" + sideCapitalized)]);
var popperBorderSide = parseFloat(css[("border" + sideCapitalized + "Width")]);
var sideValue =
center - data.offsets.popper[side] - popperMarginSide - popperBorderSide;
// prevent arrowElement from being placed not contiguously to its popper
sideValue = Math.max(Math.min(popper[len] - arrowElementSize, sideValue), 0);
data.arrowElement = arrowElement;
data.offsets.arrow = ( obj = {}, obj[side] = Math.round(sideValue), obj[altSide] = '', obj );
return data;
}
/**
* Get the opposite placement variation of the given one
* @method
* @memberof Popper.Utils
* @argument {String} placement variation
* @returns {String} flipped placement variation
*/
function getOppositeVariation(variation) {
if (variation === 'end') {
return 'start';
} else if (variation === 'start') {
return 'end';
}
return variation;
}
/**
* List of accepted placements to use as values of the `placement` option.<br />
* Valid placements are:
* - `auto`
* - `top`
* - `right`
* - `bottom`
* - `left`
*
* Each placement can have a variation from this list:
* - `-start`
* - `-end`
*
* Variations are interpreted easily if you think of them as the left to right
* written languages. Horizontally (`top` and `bottom`), `start` is left and `end`
* is right.<br />
* Vertically (`left` and `right`), `start` is top and `end` is bottom.
*
* Some valid examples are:
* - `top-end` (on top of reference, right aligned)
* - `right-start` (on right of reference, top aligned)
* - `bottom` (on bottom, centered)
* - `auto-end` (on the side with more space available, alignment depends by placement)
*
* @static
* @type {Array}
* @enum {String}
* @readonly
* @method placements
* @memberof Popper
*/
var placements = [
'auto-start',
'auto',
'auto-end',
'top-start',
'top',
'top-end',
'right-start',
'right',
'right-end',
'bottom-end',
'bottom',
'bottom-start',
'left-end',
'left',
'left-start' ];
// Get rid of `auto` `auto-start` and `auto-end`
var validPlacements = placements.slice(3);
/**
* Given an initial placement, returns all the subsequent placements
* clockwise (or counter-clockwise).
*
* @method
* @memberof Popper.Utils
* @argument {String} placement - A valid placement (it accepts variations)
* @argument {Boolean} counter - Set to true to walk the placements counterclockwise
* @returns {Array} placements including their variations
*/
function clockwise(placement, counter) {
if ( counter === void 0 ) counter = false;
var index = validPlacements.indexOf(placement);
var arr = validPlacements
.slice(index + 1)
.concat(validPlacements.slice(0, index));
return counter ? arr.reverse() : arr;
}
var BEHAVIORS = {
FLIP: 'flip',
CLOCKWISE: 'clockwise',
COUNTERCLOCKWISE: 'counterclockwise',
};
/**
* @function
* @memberof Modifiers
* @argument {Object} data - The data object generated by update method
* @argument {Object} options - Modifiers configuration and options
* @returns {Object} The data object, properly modified
*/
function flip(data, options) {
// if `inner` modifier is enabled, we can't use the `flip` modifier
if (isModifierEnabled(data.instance.modifiers, 'inner')) {
return data;
}
if (data.flipped && data.placement === data.originalPlacement) {
// seems like flip is trying to loop, probably there's not enough space on any of the flippable sides
return data;
}
var boundaries = getBoundaries(
data.instance.popper,
data.instance.reference,
options.padding,
options.boundariesElement,
data.positionFixed
);
var placement = data.placement.split('-')[0];
var placementOpposite = getOppositePlacement(placement);
var variation = data.placement.split('-')[1] || '';
var flipOrder = [];
switch (options.behavior) {
case BEHAVIORS.FLIP:
flipOrder = [placement, placementOpposite];
break;
case BEHAVIORS.CLOCKWISE:
flipOrder = clockwise(placement);
break;
case BEHAVIORS.COUNTERCLOCKWISE:
flipOrder = clockwise(placement, true);
break;
default:
flipOrder = options.behavior;
}
flipOrder.forEach(function (step, index) {
if (placement !== step || flipOrder.length === index + 1) {
return data;
}
placement = data.placement.split('-')[0];
placementOpposite = getOppositePlacement(placement);
var popperOffsets = data.offsets.popper;
var refOffsets = data.offsets.reference;
// using floor because the reference offsets may contain decimals we are not going to consider here
var floor = Math.floor;
var overlapsRef =
(placement === 'left' &&
floor(popperOffsets.right) > floor(refOffsets.left)) ||
(placement === 'right' &&
floor(popperOffsets.left) < floor(refOffsets.right)) ||
(placement === 'top' &&
floor(popperOffsets.bottom) > floor(refOffsets.top)) ||
(placement === 'bottom' &&
floor(popperOffsets.top) < floor(refOffsets.bottom));
var overflowsLeft = floor(popperOffsets.left) < floor(boundaries.left);
var overflowsRight = floor(popperOffsets.right) > floor(boundaries.right);
var overflowsTop = floor(popperOffsets.top) < floor(boundaries.top);
var overflowsBottom =
floor(popperOffsets.bottom) > floor(boundaries.bottom);
var overflowsBoundaries =
(placement === 'left' && overflowsLeft) ||
(placement === 'right' && overflowsRight) ||
(placement === 'top' && overflowsTop) ||
(placement === 'bottom' && overflowsBottom);
// flip the variation if required
var isVertical = ['top', 'bottom'].indexOf(placement) !== -1;
// flips variation if reference element overflows boundaries
var flippedVariationByRef =
!!options.flipVariations &&
((isVertical && variation === 'start' && overflowsLeft) ||
(isVertical && variation === 'end' && overflowsRight) ||
(!isVertical && variation === 'start' && overflowsTop) ||
(!isVertical && variation === 'end' && overflowsBottom));
// flips variation if popper content overflows boundaries
var flippedVariationByContent =
!!options.flipVariationsByContent &&
((isVertical && variation === 'start' && overflowsRight) ||
(isVertical && variation === 'end' && overflowsLeft) ||
(!isVertical && variation === 'start' && overflowsBottom) ||
(!isVertical && variation === 'end' && overflowsTop));
var flippedVariation = flippedVariationByRef || flippedVariationByContent;
if (overlapsRef || overflowsBoundaries || flippedVariation) {
// this boolean to detect any flip loop
data.flipped = true;
if (overlapsRef || overflowsBoundaries) {
placement = flipOrder[index + 1];
}
if (flippedVariation) {
variation = getOppositeVariation(variation);
}
data.placement = placement + (variation ? '-' + variation : '');
// this object contains `position`, we want to preserve it along with
// any additional property we may add in the future
data.offsets.popper = Object.assign({}, data.offsets.popper,
getPopperOffsets(
data.instance.popper,
data.offsets.reference,
data.placement
));
data = runModifiers(data.instance.modifiers, data, 'flip');
}
});
return data;
}
/**
* @function
* @memberof Modifiers
* @argument {Object} data - The data object generated by update method
* @argument {Object} options - Modifiers configuration and options
* @returns {Object} The data object, properly modified
*/
function keepTogether(data) {
var ref = data.offsets;
var popper = ref.popper;
var reference = ref.reference;
var placement = data.placement.split('-')[0];
var floor = Math.floor;
var isVertical = ['top', 'bottom'].indexOf(placement) !== -1;
var side = isVertical ? 'right' : 'bottom';
var opSide = isVertical ? 'left' : 'top';
var measurement = isVertical ? 'width' : 'height';
if (popper[side] < floor(reference[opSide])) {
data.offsets.popper[opSide] =
floor(reference[opSide]) - popper[measurement];
}
if (popper[opSide] > floor(reference[side])) {
data.offsets.popper[opSide] = floor(reference[side]);
}
return data;
}
/**
* Converts a string containing value + unit into a px value number
* @function
* @memberof {modifiers~offset}
* @private
* @argument {String} str - Value + unit string
* @argument {String} measurement - `height` or `width`
* @argument {Object} popperOffsets
* @argument {Object} referenceOffsets
* @returns {Number|String}
* Value in pixels, or original string if no values were extracted
*/
function toValue(str, measurement, popperOffsets, referenceOffsets) {
// separate value from unit
var split = str.match(/((?:\-|\+)?\d*\.?\d*)(.*)/);
var value = +split[1];
var unit = split[2];
// If it's not a number it's an operator, I guess
if (!value) {
return str;
}
if (unit.indexOf('%') === 0) {
var element;
switch (unit) {
case '%p':
element = popperOffsets;
break;
case '%':
case '%r':
default:
element = referenceOffsets;
}
var rect = getClientRect(element);
return rect[measurement] / 100 * value;
} else if (unit === 'vh' || unit === 'vw') {
// if is a vh or vw, we calculate the size based on the viewport
var size;
if (unit === 'vh') {
size = Math.max(
document.documentElement.clientHeight,
window.innerHeight || 0
);
} else {
size = Math.max(
document.documentElement.clientWidth,
window.innerWidth || 0
);
}
return size / 100 * value;
} else {
// if is an explicit pixel unit, we get rid of the unit and keep the value
// if is an implicit unit, it's px, and we return just the value
return value;
}
}
/**
* Parse an `offset` string to extrapolate `x` and `y` numeric offsets.
* @function
* @memberof {modifiers~offset}
* @private
* @argument {String} offset
* @argument {Object} popperOffsets
* @argument {Object} referenceOffsets
* @argument {String} basePlacement
* @returns {Array} a two cells array with x and y offsets in numbers
*/
function parseOffset(
offset,
popperOffsets,
referenceOffsets,
basePlacement
) {
var offsets = [0, 0];
// Use height if placement is left or right and index is 0 otherwise use width
// in this way the first offset will use an axis and the second one
// will use the other one
var useHeight = ['right', 'left'].indexOf(basePlacement) !== -1;
// Split the offset string to obtain a list of values and operands
// The regex addresses values with the plus or minus sign in front (+10, -20, etc)
var fragments = offset.split(/(\+|\-)/).map(function (frag) { return frag.trim(); });
// Detect if the offset string contains a pair of values or a single one
// they could be separated by comma or space
var divider = fragments.indexOf(
find(fragments, function (frag) { return frag.search(/,|\s/) !== -1; })
);
if (fragments[divider] && fragments[divider].indexOf(',') === -1) {
console.warn(
'Offsets separated by white space(s) are deprecated, use a comma (,) instead.'
);
}
// If divider is found, we divide the list of values and operands to divide
// them by ofset X and Y.
var splitRegex = /\s*,\s*|\s+/;
var ops = divider !== -1
? [
fragments
.slice(0, divider)
.concat([fragments[divider].split(splitRegex)[0]]),
[fragments[divider].split(splitRegex)[1]].concat(
fragments.slice(divider + 1)
) ]
: [fragments];
// Convert the values with units to absolute pixels to allow our computations
ops = ops.map(function (op, index) {
// Most of the units rely on the orientation of the popper
var measurement = (index === 1 ? !useHeight : useHeight)
? 'height'
: 'width';
var mergeWithPrevious = false;
return (
op
// This aggregates any `+` or `-` sign that aren't considered operators
// e.g.: 10 + +5 => [10, +, +5]
.reduce(function (a, b) {
if (a[a.length - 1] === '' && ['+', '-'].indexOf(b) !== -1) {
a[a.length - 1] = b;
mergeWithPrevious = true;
return a;
} else if (mergeWithPrevious) {
a[a.length - 1] += b;
mergeWithPrevious = false;
return a;
} else {
return a.concat(b);
}
}, [])
// Here we convert the string values into number values (in px)
.map(function (str) { return toValue(str, measurement, popperOffsets, referenceOffsets); })
);
});
// Loop trough the offsets arrays and execute the operations
ops.forEach(function (op, index) {
op.forEach(function (frag, index2) {
if (isNumeric(frag)) {
offsets[index] += frag * (op[index2 - 1] === '-' ? -1 : 1);
}
});
});
return offsets;
}
/**
* @function
* @memberof Modifiers
* @argument {Object} data - The data object generated by update method
* @argument {Object} options - Modifiers configuration and options
* @argument {Number|String} options.offset=0
* The offset value as described in the modifier description
* @returns {Object} The data object, properly modified
*/
function offset(data, ref) {
var offset = ref.offset;
var placement = data.placement;
var data_offsets = data.offsets;
var popper = data_offsets.popper;
var reference = data_offsets.reference;
var basePlacement = placement.split('-')[0];
var offsets;
if (isNumeric(+offset)) {
offsets = [+offset, 0];
} else {
offsets = parseOffset(offset, popper, reference, basePlacement);
}
if (basePlacement === 'left') {
popper.top += offsets[0];
popper.left -= offsets[1];
} else if (basePlacement === 'right') {
popper.top += offsets[0];
popper.left += offsets[1];
} else if (basePlacement === 'top') {
popper.left += offsets[0];
popper.top -= offsets[1];
} else if (basePlacement === 'bottom') {
popper.left += offsets[0];
popper.top += offsets[1];
}
data.popper = popper;
return data;
}
/**
* @function
* @memberof Modifiers
* @argument {Object} data - The data object generated by `update` method
* @argument {Object} options - Modifiers configuration and options
* @returns {Object} The data object, properly modified
*/
function preventOverflow(data, options) {
var boundariesElement =
options.boundariesElement || getOffsetParent(data.instance.popper);
// If offsetParent is the reference element, we really want to
// go one step up and use the next offsetParent as reference to
// avoid to make this modifier completely useless and look like broken
if (data.instance.reference === boundariesElement) {
boundariesElement = getOffsetParent(boundariesElement);
}
// NOTE: DOM access here
// resets the popper's position so that the document size can be calculated excluding
// the size of the popper element itself
var transformProp = getSupportedPropertyName('transform');
var popperStyles = data.instance.popper.style; // assignment to help minification
var top = popperStyles.top;
var left = popperStyles.left;
var transform = popperStyles[transformProp];
popperStyles.top = '';
popperStyles.left = '';
popperStyles[transformProp] = '';
var boundaries = getBoundaries(
data.instance.popper,
data.instance.reference,
options.padding,
boundariesElement,
data.positionFixed
);
// NOTE: DOM access here
// restores the original style properties after the offsets have been computed
popperStyles.top = top;
popperStyles.left = left;
popperStyles[transformProp] = transform;
options.boundaries = boundaries;
var order = options.priority;
var popper = data.offsets.popper;
var check = {
primary: function primary(placement) {
var obj;
var value = popper[placement];
if (
popper[placement] < boundaries[placement] &&
!options.escapeWithReference
) {
value = Math.max(popper[placement], boundaries[placement]);
}
return ( obj = {}, obj[placement] = value, obj );
},
secondary: function secondary(placement) {
var obj;
var mainSide = placement === 'right' ? 'left' : 'top';
var value = popper[mainSide];
if (
popper[placement] > boundaries[placement] &&
!options.escapeWithReference
) {
value = Math.min(
popper[mainSide],
boundaries[placement] -
(placement === 'right' ? popper.width : popper.height)
);
}
return ( obj = {}, obj[mainSide] = value, obj );
},
};
order.forEach(function (placement) {
var side =
['left', 'top'].indexOf(placement) !== -1 ? 'primary' : 'secondary';
popper = Object.assign({}, popper, check[side](placement));
});
data.offsets.popper = popper;
return data;
}
/**
* @function
* @memberof Modifiers
* @argument {Object} data - The data object generated by `update` method
* @argument {Object} options - Modifiers configuration and options
* @returns {Object} The data object, properly modified
*/
function shift(data) {
var obj, obj$1;
var placement = data.placement;
var basePlacement = placement.split('-')[0];
var shiftvariation = placement.split('-')[1];
// if shift shiftvariation is specified, run the modifier
if (shiftvariation) {
var ref = data.offsets;
var reference = ref.reference;
var popper = ref.popper;
var isVertical = ['bottom', 'top'].indexOf(basePlacement) !== -1;
var side = isVertical ? 'left' : 'top';
var measurement = isVertical ? 'width' : 'height';
var shiftOffsets = {
start: ( obj = {}, obj[side] = reference[side], obj ),
end: ( obj$1 = {}, obj$1[side] = reference[side] + reference[measurement] - popper[measurement], obj$1 ),
};
data.offsets.popper = Object.assign({}, popper, shiftOffsets[shiftvariation]);
}
return data;
}
/**
* @function
* @memberof Modifiers
* @argument {Object} data - The data object generated by update method
* @argument {Object} options - Modifiers configuration and options
* @returns {Object} The data object, properly modified
*/
function hide(data) {
if (!isModifierRequired(data.instance.modifiers, 'hide', 'preventOverflow')) {
return data;
}
var refRect = data.offsets.reference;
var bound = find(
data.instance.modifiers,
function (modifier) { return modifier.name === 'preventOverflow'; }
).boundaries;
if (
refRect.bottom < bound.top ||
refRect.left > bound.right ||
refRect.top > bound.bottom ||
refRect.right < bound.left
) {
// Avoid unnecessary DOM access if visibility hasn't changed
if (data.hide === true) {
return data;
}
data.hide = true;
data.attributes['x-out-of-boundaries'] = '';
} else {
// Avoid unnecessary DOM access if visibility hasn't changed
if (data.hide === false) {
return data;
}
data.hide = false;
data.attributes['x-out-of-boundaries'] = false;
}
return data;
}
/**
* @function
* @memberof Modifiers
* @argument {Object} data - The data object generated by `update` method
* @argument {Object} options - Modifiers configuration and options
* @returns {Object} The data object, properly modified
*/
function inner(data) {
var placement = data.placement;
var basePlacement = placement.split('-')[0];
var ref = data.offsets;
var popper = ref.popper;
var reference = ref.reference;
var isHoriz = ['left', 'right'].indexOf(basePlacement) !== -1;
var subtractLength = ['top', 'left'].indexOf(basePlacement) === -1;
popper[isHoriz ? 'left' : 'top'] =
reference[basePlacement] -
(subtractLength ? popper[isHoriz ? 'width' : 'height'] : 0);
data.placement = getOppositePlacement(placement);
data.offsets.popper = getClientRect(popper);
return data;
}
/**
* Modifier function, each modifier can have a function of this type assigned
* to its `fn` property.<br />
* These functions will be called on each update, this means that you must
* make sure they are performant enough to avoid performance bottlenecks.
*
* @function ModifierFn
* @argument {dataObject} data - The data object generated by `update` method
* @argument {Object} options - Modifiers configuration and options
* @returns {dataObject} The data object, properly modified
*/
/**
* Modifiers are plugins used to alter the behavior of your poppers.<br />
* Popper.js uses a set of 9 modifiers to provide all the basic functionalities
* needed by the library.
*
* Usually you don't want to override the `order`, `fn` and `onLoad` props.
* All the other properties are configurations that could be tweaked.
* @namespace modifiers
*/
var modifiers = {
/**
* Modifier used to shift the popper on the start or end of its reference
* element.<br />
* It will read the variation of the `placement` property.<br />
* It can be one either `-end` or `-start`.
* @memberof modifiers
* @inner
*/
shift: {
/** @prop {number} order=100 - Index used to define the order of execution */
order: 100,
/** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
enabled: true,
/** @prop {ModifierFn} */
fn: shift,
},
/**
* The `offset` modifier can shift your popper on both its axis.
*
* It accepts the following units:
* - `px` or unit-less, interpreted as pixels
* - `%` or `%r`, percentage relative to the length of the reference element
* - `%p`, percentage relative to the length of the popper element
* - `vw`, CSS viewport width unit
* - `vh`, CSS viewport height unit
*
* For length is intended the main axis relative to the placement of the popper.<br />
* This means that if the placement is `top` or `bottom`, the length will be the
* `width`. In case of `left` or `right`, it will be the `height`.
*
* You can provide a single value (as `Number` or `String`), or a pair of values
* as `String` divided by a comma or one (or more) white spaces.<br />
* The latter is a deprecated method because it leads to confusion and will be
* removed in v2.<br />
* Additionally, it accepts additions and subtractions between different units.
* Note that multiplications and divisions aren't supported.
*
* Valid examples are:
* ```
* 10
* '10%'
* '10, 10'
* '10%, 10'
* '10 + 10%'
* '10 - 5vh + 3%'
* '-10px + 5vh, 5px - 6%'
* ```
* > **NB**: If you desire to apply offsets to your poppers in a way that may make them overlap
* > with their reference element, unfortunately, you will have to disable the `flip` modifier.
* > You can read more on this at this [issue](https://github.com/FezVrasta/popper.js/issues/373).
*
* @memberof modifiers
* @inner
*/
offset: {
/** @prop {number} order=200 - Index used to define the order of execution */
order: 200,
/** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
enabled: true,
/** @prop {ModifierFn} */
fn: offset,
/** @prop {Number|String} offset=0
* The offset value as described in the modifier description
*/
offset: 0,
},
/**
* Modifier used to prevent the popper from being positioned outside the boundary.
*
* A scenario exists where the reference itself is not within the boundaries.<br />
* We can say it has "escaped the boundaries" — or just "escaped".<br />
* In this case we need to decide whether the popper should either:
*
* - detach from the reference and remain "trapped" in the boundaries, or
* - if it should ignore the boundary and "escape with its reference"
*
* When `escapeWithReference` is set to`true` and reference is completely
* outside its boundaries, the popper will overflow (or completely leave)
* the boundaries in order to remain attached to the edge of the reference.
*
* @memberof modifiers
* @inner
*/
preventOverflow: {
/** @prop {number} order=300 - Index used to define the order of execution */
order: 300,
/** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
enabled: true,
/** @prop {ModifierFn} */
fn: preventOverflow,
/**
* @prop {Array} [priority=['left','right','top','bottom']]
* Popper will try to prevent overflow following these priorities by default,
* then, it could overflow on the left and on top of the `boundariesElement`
*/
priority: ['left', 'right', 'top', 'bottom'],
/**
* @prop {number} padding=5
* Amount of pixel used to define a minimum distance between the boundaries
* and the popper. This makes sure the popper always has a little padding
* between the edges of its container
*/
padding: 5,
/**
* @prop {String|HTMLElement} boundariesElement='scrollParent'
* Boundaries used by the modifier. Can be `scrollParent`, `window`,
* `viewport` or any DOM element.
*/
boundariesElement: 'scrollParent',
},
/**
* Modifier used to make sure the reference and its popper stay near each other
* without leaving any gap between the two. Especially useful when the arrow is
* enabled and you want to ensure that it points to its reference element.
* It cares only about the first axis. You can still have poppers with margin
* between the popper and its reference element.
* @memberof modifiers
* @inner
*/
keepTogether: {
/** @prop {number} order=400 - Index used to define the order of execution */
order: 400,
/** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
enabled: true,
/** @prop {ModifierFn} */
fn: keepTogether,
},
/**
* This modifier is used to move the `arrowElement` of the popper to make
* sure it is positioned between the reference element and its popper element.
* It will read the outer size of the `arrowElement` node to detect how many
* pixels of conjunction are needed.
*
* It has no effect if no `arrowElement` is provided.
* @memberof modifiers
* @inner
*/
arrow: {
/** @prop {number} order=500 - Index used to define the order of execution */
order: 500,
/** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
enabled: true,
/** @prop {ModifierFn} */
fn: arrow,
/** @prop {String|HTMLElement} element='[x-arrow]' - Selector or node used as arrow */
element: '[x-arrow]',
},
/**
* Modifier used to flip the popper's placement when it starts to overlap its
* reference element.
*
* Requires the `preventOverflow` modifier before it in order to work.
*
* **NOTE:** this modifier will interrupt the current update cycle and will
* restart it if it detects the need to flip the placement.
* @memberof modifiers
* @inner
*/
flip: {
/** @prop {number} order=600 - Index used to define the order of execution */
order: 600,
/** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
enabled: true,
/** @prop {ModifierFn} */
fn: flip,
/**
* @prop {String|Array} behavior='flip'
* The behavior used to change the popper's placement. It can be one of
* `flip`, `clockwise`, `counterclockwise` or an array with a list of valid
* placements (with optional variations)
*/
behavior: 'flip',
/**
* @prop {number} padding=5
* The popper will flip if it hits the edges of the `boundariesElement`
*/
padding: 5,
/**
* @prop {String|HTMLElement} boundariesElement='viewport'
* The element which will define the boundaries of the popper position.
* The popper will never be placed outside of the defined boundaries
* (except if `keepTogether` is enabled)
*/
boundariesElement: 'viewport',
/**
* @prop {Boolean} flipVariations=false
* The popper will switch placement variation between `-start` and `-end` when
* the reference element overlaps its boundaries.
*
* The original placement should have a set variation.
*/
flipVariations: false,
/**
* @prop {Boolean} flipVariationsByContent=false
* The popper will switch placement variation between `-start` and `-end` when
* the popper element overlaps its reference boundaries.
*
* The original placement should have a set variation.
*/
flipVariationsByContent: false,
},
/**
* Modifier used to make the popper flow toward the inner of the reference element.
* By default, when this modifier is disabled, the popper will be placed outside
* the reference element.
* @memberof modifiers
* @inner
*/
inner: {
/** @prop {number} order=700 - Index used to define the order of execution */
order: 700,
/** @prop {Boolean} enabled=false - Whether the modifier is enabled or not */
enabled: false,
/** @prop {ModifierFn} */
fn: inner,
},
/**
* Modifier used to hide the popper when its reference element is outside of the
* popper boundaries. It will set a `x-out-of-boundaries` attribute which can
* be used to hide with a CSS selector the popper when its reference is
* out of boundaries.
*
* Requires the `preventOverflow` modifier before it in order to work.
* @memberof modifiers
* @inner
*/
hide: {
/** @prop {number} order=800 - Index used to define the order of execution */
order: 800,
/** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
enabled: true,
/** @prop {ModifierFn} */
fn: hide,
},
/**
* Computes the style that will be applied to the popper element to gets
* properly positioned.
*
* Note that this modifier will not touch the DOM, it just prepares the styles
* so that `applyStyle` modifier can apply it. This separation is useful
* in case you need to replace `applyStyle` with a custom implementation.
*
* This modifier has `850` as `order` value to maintain backward compatibility
* with previous versions of Popper.js. Expect the modifiers ordering method
* to change in future major versions of the library.
*
* @memberof modifiers
* @inner
*/
computeStyle: {
/** @prop {number} order=850 - Index used to define the order of execution */
order: 850,
/** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
enabled: true,
/** @prop {ModifierFn} */
fn: computeStyle,
/**
* @prop {Boolean} gpuAcceleration=true
* If true, it uses the CSS 3D transformation to position the popper.
* Otherwise, it will use the `top` and `left` properties
*/
gpuAcceleration: true,
/**
* @prop {string} [x='bottom']
* Where to anchor the X axis (`bottom` or `top`). AKA X offset origin.
* Change this if your popper should grow in a direction different from `bottom`
*/
x: 'bottom',
/**
* @prop {string} [x='left']
* Where to anchor the Y axis (`left` or `right`). AKA Y offset origin.
* Change this if your popper should grow in a direction different from `right`
*/
y: 'right',
},
/**
* Applies the computed styles to the popper element.
*
* All the DOM manipulations are limited to this modifier. This is useful in case
* you want to integrate Popper.js inside a framework or view library and you
* want to delegate all the DOM manipulations to it.
*
* Note that if you disable this modifier, you must make sure the popper element
* has its position set to `absolute` before Popper.js can do its work!
*
* Just disable this modifier and define your own to achieve the desired effect.
*
* @memberof modifiers
* @inner
*/
applyStyle: {
/** @prop {number} order=900 - Index used to define the order of execution */
order: 900,
/** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */
enabled: true,
/** @prop {ModifierFn} */
fn: applyStyle,
/** @prop {Function} */
onLoad: applyStyleOnLoad,
/**
* @deprecated since version 1.10.0, the property moved to `computeStyle` modifier
* @prop {Boolean} gpuAcceleration=true
* If true, it uses the CSS 3D transformation to position the popper.
* Otherwise, it will use the `top` and `left` properties
*/
gpuAcceleration: undefined,
},
};
/**
* The `dataObject` is an object containing all the information used by Popper.js.
* This object is passed to modifiers and to the `onCreate` and `onUpdate` callbacks.
* @name dataObject
* @property {Object} data.instance The Popper.js instance
* @property {String} data.placement Placement applied to popper
* @property {String} data.originalPlacement Placement originally defined on init
* @property {Boolean} data.flipped True if popper has been flipped by flip modifier
* @property {Boolean} data.hide True if the reference element is out of boundaries, useful to know when to hide the popper
* @property {HTMLElement} data.arrowElement Node used as arrow by arrow modifier
* @property {Object} data.styles Any CSS property defined here will be applied to the popper. It expects the JavaScript nomenclature (eg. `marginBottom`)
* @property {Object} data.arrowStyles Any CSS property defined here will be applied to the popper arrow. It expects the JavaScript nomenclature (eg. `marginBottom`)
* @property {Object} data.boundaries Offsets of the popper boundaries
* @property {Object} data.offsets The measurements of popper, reference and arrow elements
* @property {Object} data.offsets.popper `top`, `left`, `width`, `height` values
* @property {Object} data.offsets.reference `top`, `left`, `width`, `height` values
* @property {Object} data.offsets.arrow] `top` and `left` offsets, only one of them will be different from 0
*/
/**
* Default options provided to Popper.js constructor.<br />
* These can be overridden using the `options` argument of Popper.js.<br />
* To override an option, simply pass an object with the same
* structure of the `options` object, as the 3rd argument. For example:
* ```
* new Popper(ref, pop, {
* modifiers: {
* preventOverflow: { enabled: false }
* }
* })
* ```
* @type {Object}
* @static
* @memberof Popper
*/
var Defaults = {
/**
* Popper's placement.
* @prop {Popper.placements} placement='bottom'
*/
placement: 'bottom',
/**
* Set this to true if you want popper to position it self in 'fixed' mode
* @prop {Boolean} positionFixed=false
*/
positionFixed: false,
/**
* Whether events (resize, scroll) are initially enabled.
* @prop {Boolean} eventsEnabled=true
*/
eventsEnabled: true,
/**
* Set to true if you want to automatically remove the popper when
* you call the `destroy` method.
* @prop {Boolean} removeOnDestroy=false
*/
removeOnDestroy: false,
/**
* Callback called when the popper is created.<br />
* By default, it is set to no-op.<br />
* Access Popper.js instance with `data.instance`.
* @prop {onCreate}
*/
onCreate: function () {},
/**
* Callback called when the popper is updated. This callback is not called
* on the initialization/creation of the popper, but only on subsequent
* updates.<br />
* By default, it is set to no-op.<br />
* Access Popper.js instance with `data.instance`.
* @prop {onUpdate}
*/
onUpdate: function () {},
/**
* List of modifiers used to modify the offsets before they are applied to the popper.
* They provide most of the functionalities of Popper.js.
* @prop {modifiers}
*/
modifiers: modifiers,
};
/**
* @callback onCreate
* @param {dataObject} data
*/
/**
* @callback onUpdate
* @param {dataObject} data
*/
// Utils
var Popper = function Popper(reference, popper, options) {
var this$1 = this;
if ( options === void 0 ) options = {};
// make update() debounced, so that it only runs at most once-per-tick
this.update = debounce(this.update.bind(this));
this.scheduleUpdate = this.scheduleUpdate.bind(this);
// with {} we create a new object with the options inside it
this.options = Object.assign({}, Popper.Defaults, options);
// init state
this.state = {
isDestroyed: false,
isCreated: false,
scrollParents: [],
};
// get reference and popper elements (allow jQuery wrappers)
this.reference = reference && reference.jquery ? reference[0] : reference;
this.popper = popper && popper.jquery ? popper[0] : popper;
// Deep merge modifiers options
this.options.modifiers = {};
Object.keys(Object.assign({}, Popper.Defaults.modifiers,
options.modifiers)).forEach(function (name) {
this$1.options.modifiers[name] = Object.assign({}, (Popper.Defaults.modifiers[name] || {}),
// If there are custom options, override and merge with default ones
(options.modifiers ? options.modifiers[name] : {}));
});
// Refactoring modifiers' list (Object => Array)
this.modifiers = Object.keys(this.options.modifiers)
.map(function (name) { return (Object.assign({}, {name: name},
this$1.options.modifiers[name])); })
// sort the modifiers by order
.sort(function (a, b) { return a.order - b.order; });
// modifiers have the ability to execute arbitrary code when Popper.js get inited
// such code is executed in the same order of its modifier
// they could add new properties to their options configuration
// BE AWARE: don't add options to `options.modifiers.name` but to `modifierOptions`!
this.modifiers.forEach(function (modifierOptions) {
if (modifierOptions.enabled && isFunction(modifierOptions.onLoad)) {
modifierOptions.onLoad(
this$1.reference,
this$1.popper,
this$1.options,
modifierOptions,
this$1.state
);
}
});
// fire the first update to position the popper in the right place
this.update();
var eventsEnabled = this.options.eventsEnabled;
if (eventsEnabled) {
// setup event listeners, they will take care of update the position in specific situations
this.enableEventListeners();
}
this.state.eventsEnabled = eventsEnabled;
};
// We can't use class properties because they don't get listed in the
// class prototype and break stuff like Sinon stubs
Popper.prototype.update = function update$1 () {
return update.call(this);
};
Popper.prototype.destroy = function destroy$1 () {
return destroy.call(this);
};
Popper.prototype.enableEventListeners = function enableEventListeners$1 () {
return enableEventListeners.call(this);
};
Popper.prototype.disableEventListeners = function disableEventListeners$1 () {
return disableEventListeners.call(this);
};
/**
* Schedules an update. It will run on the next UI update available.
* @method scheduleUpdate
* @memberof Popper
*/
Popper.prototype.scheduleUpdate = function scheduleUpdate () {
return requestAnimationFrame(this.update);
};
/**
* Collection of utilities useful when writing custom modifiers.
* Starting from version 1.7, this method is available only if you
* include `popper-utils.js` before `popper.js`.
*
* **DEPRECATION**: This way to access PopperUtils is deprecated
* and will be removed in v2! Use the PopperUtils module directly instead.
* Due to the high instability of the methods contained in Utils, we can't
* guarantee them to follow semver. Use them at your own risk!
* @static
* @private
* @type {Object}
* @deprecated since version 1.8
* @member Utils
* @memberof Popper
*/
Popper.Utils = (typeof window !== 'undefined' ? window : global).PopperUtils;
Popper.placements = placements;
Popper.Defaults = Defaults;
/**
* The `referenceObject` is an object that provides an interface compatible with Popper.js
* and lets you use it as replacement of a real DOM node.<br />
* You can use this method to position a popper relatively to a set of coordinates
* in case you don't have a DOM node to use as reference.
*
* ```
* new Popper(referenceObject, popperNode);
* ```
*
* NB: This feature isn't supported in Internet Explorer 10.
* @name referenceObject
* @property {Function} data.getBoundingClientRect
* A function that returns a set of coordinates compatible with the native `getBoundingClientRect` method.
* @property {number} data.clientWidth
* An ES6 getter that will return the width of the virtual reference element.
* @property {number} data.clientHeight
* An ES6 getter that will return the height of the virtual reference element.
*/
return Popper;
})));