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* @fileOverview Kickass library to create and place poppers near their reference elements.
* @version 1.12.5
* @license
* Copyright (c) 2016 Federico Zivolo and contributors
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
typeof define === 'function' && define.amd ? define(factory) :
(global.Popper = factory());
}(this, (function () { 'use strict';
var nativeHints = ['native code', '[object MutationObserverConstructor]'];
/**
* Determine if a function is implemented natively (as opposed to a polyfill).
* @method
* @memberof Popper.Utils
* @argument {Function | undefined} fn the function to check
* @returns {Boolean}
*/
var isNative = (function (fn) {
return nativeHints.some(function (hint) {
return (fn || '').toString().indexOf(hint) > -1;
});
});
var isBrowser = typeof window !== 'undefined';
var longerTimeoutBrowsers = ['Edge', 'Trident', 'Firefox'];
var timeoutDuration = 0;
for (var i = 0; i < longerTimeoutBrowsers.length; i += 1) {
if (isBrowser && navigator.userAgent.indexOf(longerTimeoutBrowsers[i]) >= 0) {
timeoutDuration = 1;
break;
}
}
function microtaskDebounce(fn) {
var scheduled = false;
var i = 0;
var elem = document.createElement('span');
// MutationObserver provides a mechanism for scheduling microtasks, which
// are scheduled *before* the next task. This gives us a way to debounce
// a function but ensure it's called *before* the next paint.
var observer = new MutationObserver(function () {
fn();
scheduled = false;
});
observer.observe(elem, { attributes: true });
return function () {
if (!scheduled) {
scheduled = true;
elem.setAttribute('x-index', i);
i = i + 1; // don't use compund (+=) because it doesn't get optimized in V8
}
};
}
function taskDebounce(fn) {
var scheduled = false;
return function () {
if (!scheduled) {
scheduled = true;
setTimeout(function () {
scheduled = false;
fn();
}, timeoutDuration);
}
};
}
// It's common for MutationObserver polyfills to be seen in the wild, however
// these rely on Mutation Events which only occur when an element is connected
// to the DOM. The algorithm used in this module does not use a connected element,
// and so we must ensure that a *native* MutationObserver is available.
var supportsNativeMutationObserver = isBrowser && isNative(window.MutationObserver);
/**
* 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 = supportsNativeMutationObserver ? 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 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 || ['HTML', 'BODY', '#document'].indexOf(element.nodeName) !== -1) {
return window.document.body;
}
// Firefox want us to check `-x` and `-y` variations as well
var _getStyleComputedProp = getStyleComputedProperty(element),
overflow = _getStyleComputedProp.overflow,
overflowX = _getStyleComputedProp.overflowX,
overflowY = _getStyleComputedProp.overflowY;
if (/(auto|scroll)/.test(overflow + overflowY + overflowX)) {
return element;
}
return getScrollParent(getParentNode(element));
}
/**
* Returns the offset parent of the given element
* @method
* @memberof Popper.Utils
* @argument {Element} element
* @returns {Element} offset parent
*/
function getOffsetParent(element) {
// NOTE: 1 DOM access here
var offsetParent = element && element.offsetParent;
var nodeName = offsetParent && offsetParent.nodeName;
if (!nodeName || nodeName === 'BODY' || nodeName === 'HTML') {
return window.document.documentElement;
}
// .offsetParent will return the closest TD or TABLE in case
// no offsetParent is present, I hate this job...
if (['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 window.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) {
var side = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'top';
var upperSide = side === 'top' ? 'scrollTop' : 'scrollLeft';
var nodeName = element.nodeName;
if (nodeName === 'BODY' || nodeName === 'HTML') {
var html = window.document.documentElement;
var scrollingElement = window.document.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) {
var subtract = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 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 +styles['border' + sideA + 'Width'].split('px')[0] + +styles['border' + sideB + 'Width'].split('px')[0];
}
/**
* Tells if you are running Internet Explorer 10
* @method
* @memberof Popper.Utils
* @returns {Boolean} isIE10
*/
var isIE10 = undefined;
var isIE10$1 = function () {
if (isIE10 === undefined) {
isIE10 = navigator.appVersion.indexOf('MSIE 10') !== -1;
}
return isIE10;
};
function getSize(axis, body, html, computedStyle) {
return Math.max(body['offset' + axis], body['scroll' + axis], html['client' + axis], html['offset' + axis], html['scroll' + axis], isIE10$1() ? html['offset' + axis] + computedStyle['margin' + (axis === 'Height' ? 'Top' : 'Left')] + computedStyle['margin' + (axis === 'Height' ? 'Bottom' : 'Right')] : 0);
}
function getWindowSizes() {
var body = window.document.body;
var html = window.document.documentElement;
var computedStyle = isIE10$1() && window.getComputedStyle(html);
return {
height: getSize('Height', body, html, computedStyle),
width: getSize('Width', body, html, computedStyle)
};
}
var classCallCheck = function (instance, Constructor) {
if (!(instance instanceof Constructor)) {
throw new TypeError("Cannot call a class as a function");
}
};
var createClass = function () {
function defineProperties(target, props) {
for (var i = 0; i < props.length; i++) {
var descriptor = props[i];
descriptor.enumerable = descriptor.enumerable || false;
descriptor.configurable = true;
if ("value" in descriptor) descriptor.writable = true;
Object.defineProperty(target, descriptor.key, descriptor);
}
}
return function (Constructor, protoProps, staticProps) {
if (protoProps) defineProperties(Constructor.prototype, protoProps);
if (staticProps) defineProperties(Constructor, staticProps);
return Constructor;
};
}();
var defineProperty = function (obj, key, value) {
if (key in obj) {
Object.defineProperty(obj, key, {
value: value,
enumerable: true,
configurable: true,
writable: true
});
} else {
obj[key] = value;
}
return obj;
};
var _extends = Object.assign || function (target) {
for (var i = 1; i < arguments.length; i++) {
var source = arguments[i];
for (var key in source) {
if (Object.prototype.hasOwnProperty.call(source, key)) {
target[key] = source[key];
}
}
}
return target;
};
/**
* 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 _extends({}, 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
if (isIE10$1()) {
try {
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;
} catch (err) {}
} else {
rect = element.getBoundingClientRect();
}
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() : {};
var width = sizes.width || element.clientWidth || result.right - result.left;
var height = sizes.height || element.clientHeight || result.bottom - result.top;
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) {
var isIE10 = isIE10$1();
var isHTML = parent.nodeName === 'HTML';
var childrenRect = getBoundingClientRect(children);
var parentRect = getBoundingClientRect(parent);
var scrollParent = getScrollParent(children);
var styles = getStyleComputedProperty(parent);
var borderTopWidth = +styles.borderTopWidth.split('px')[0];
var borderLeftWidth = +styles.borderLeftWidth.split('px')[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 = +styles.marginTop.split('px')[0];
var marginLeft = +styles.marginLeft.split('px')[0];
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 ? parent.contains(scrollParent) : parent === scrollParent && scrollParent.nodeName !== 'BODY') {
offsets = includeScroll(offsets, parent);
}
return offsets;
}
function getViewportOffsetRectRelativeToArtbitraryNode(element) {
var html = window.document.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 = getScroll(html);
var scrollLeft = getScroll(html, 'left');
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;
}
return isFixed(getParentNode(element));
}
/**
* 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
* @returns {Object} Coordinates of the boundaries
*/
function getBoundaries(popper, reference, padding, boundariesElement) {
// NOTE: 1 DOM access here
var boundaries = { top: 0, left: 0 };
var offsetParent = findCommonOffsetParent(popper, reference);
// Handle viewport case
if (boundariesElement === 'viewport') {
boundaries = getViewportOffsetRectRelativeToArtbitraryNode(offsetParent);
} else {
// Handle other cases based on DOM element used as boundaries
var boundariesNode = void 0;
if (boundariesElement === 'scrollParent') {
boundariesNode = getScrollParent(getParentNode(popper));
if (boundariesNode.nodeName === 'BODY') {
boundariesNode = window.document.documentElement;
}
} else if (boundariesElement === 'window') {
boundariesNode = window.document.documentElement;
} else {
boundariesNode = boundariesElement;
}
var offsets = getOffsetRectRelativeToArbitraryNode(boundariesNode, offsetParent);
// In case of HTML, we need a different computation
if (boundariesNode.nodeName === 'HTML' && !isFixed(offsetParent)) {
var _getWindowSizes = getWindowSizes(),
height = _getWindowSizes.height,
width = _getWindowSizes.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
boundaries.left += padding;
boundaries.top += padding;
boundaries.right -= padding;
boundaries.bottom -= padding;
return boundaries;
}
function getArea(_ref) {
var width = _ref.width,
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) {
var padding = arguments.length > 5 && arguments[5] !== undefined ? arguments[5] : 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 _extends({
key: key
}, rects[key], {
area: getArea(rects[key])
});
}).sort(function (a, b) {
return b.area - a.area;
});
var filteredAreas = sortedAreas.filter(function (_ref2) {
var width = _ref2.width,
height = _ref2.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)
* @returns {Object} An object containing the offsets which will be applied to the popper
*/
function getReferenceOffsets(state, popper, reference) {
var commonOffsetParent = findCommonOffsetParent(popper, reference);
return getOffsetRectRelativeToArbitraryNode(reference, commonOffsetParent);
}
/**
* 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 styles = window.getComputedStyle(element);
var x = parseFloat(styles.marginTop) + parseFloat(styles.marginBottom);
var y = parseFloat(styles.marginLeft) + parseFloat(styles.marginRight);
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) {
console.warn('`modifier.function` is deprecated, use `modifier.fn`!');
}
var fn = modifier.function || modifier.fn;
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);
// 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;
// compute the popper offsets
data.offsets.popper = getPopperOffsets(this.popper, data.offsets.reference, data.placement);
data.offsets.popper.position = '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,
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 - 1; i++) {
var prefix = prefixes[i];
var toCheck = prefix ? '' + prefix + upperProp : property;
if (typeof window.document.body.style[toCheck] !== 'undefined') {
return toCheck;
}
}
return null;
}
/**
* Destroy 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.left = '';
this.popper.style.position = '';
this.popper.style.top = '';
this.popper.style[getSupportedPropertyName('transform')] = '';
}
this.disableEventListeners();
// remove the popper if user explicity 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;
}
function attachToScrollParents(scrollParent, event, callback, scrollParents) {
var isBody = scrollParent.nodeName === 'BODY';
var target = isBody ? window : 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;
window.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
window.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) {
window.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);
// 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: 'absolute' });
return options;
}
/**
* @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,
y = options.y;
var popper = data.offsets.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
};
// floor sides to avoid blurry text
var offsets = {
left: Math.floor(popper.left),
top: Math.floor(popper.top),
bottom: Math.floor(popper.bottom),
right: Math.floor(popper.right)
};
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 = void 0,
top = void 0;
if (sideA === 'bottom') {
top = -offsetParentRect.height + offsets.bottom;
} else {
top = offsets.top;
}
if (sideB === 'right') {
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 = _extends({}, attributes, data.attributes);
data.styles = _extends({}, styles, data.styles);
data.arrowStyles = _extends({}, 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 = '`' + requestingName + '`';
var requested = '`' + requestedName + '`';
console.warn(requested + ' modifier is required by ' + _requesting + ' modifier in order to work, be sure to include it before ' + _requesting + '!');
}
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) {
// 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 _data$offsets = data.offsets,
popper = _data$offsets.popper,
reference = _data$offsets.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 conjuction
//
// 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];
}
// 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 popperMarginSide = getStyleComputedProperty(data.instance.popper, 'margin' + sideCapitalized).replace('px', '');
var sideValue = center - getClientRect(data.offsets.popper)[side] - popperMarginSide;
// 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 = {};
data.offsets.arrow[side] = Math.round(sideValue);
data.offsets.arrow[altSide] = ''; // make sure to unset any eventual altSide value from the DOM node
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-right` (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) {
var counter = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 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);
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;
var flippedVariation = !!options.flipVariations && (isVertical && variation === 'start' && overflowsLeft || isVertical && variation === 'end' && overflowsRight || !isVertical && variation === 'start' && overflowsTop || !isVertical && variation === 'end' && overflowsBottom);
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 = _extends({}, 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 _data$offsets = data.offsets,
popper = _data$offsets.popper,
reference = _data$offsets.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 = void 0;
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 = void 0;
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,
_data$offsets = data.offsets,
popper = _data$offsets.popper,
reference = _data$offsets.reference;
var basePlacement = placement.split('-')[0];
var offsets = void 0;
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);
}
var boundaries = getBoundaries(data.instance.popper, data.instance.reference, options.padding, boundariesElement);
options.boundaries = boundaries;
var order = options.priority;
var popper = data.offsets.popper;
var check = {
primary: function primary(placement) {
var value = popper[placement];
if (popper[placement] < boundaries[placement] && !options.escapeWithReference) {
value = Math.max(popper[placement], boundaries[placement]);
}
return defineProperty({}, placement, value);
},
secondary: function secondary(placement) {
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 defineProperty({}, mainSide, value);
}
};
order.forEach(function (placement) {
var side = ['left', 'top'].indexOf(placement) !== -1 ? 'primary' : 'secondary';
popper = _extends({}, 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 placement = data.placement;
var basePlacement = placement.split('-')[0];
var shiftvariation = placement.split('-')[1];
// if shift shiftvariation is specified, run the modifier
if (shiftvariation) {
var _data$offsets = data.offsets,
reference = _data$offsets.reference,
popper = _data$offsets.popper;
var isVertical = ['bottom', 'top'].indexOf(basePlacement) !== -1;
var side = isVertical ? 'left' : 'top';
var measurement = isVertical ? 'width' : 'height';
var shiftOffsets = {
start: defineProperty({}, side, reference[side]),
end: defineProperty({}, side, reference[side] + reference[measurement] - popper[measurement])
};
data.offsets.popper = _extends({}, popper, shiftOffsets[shiftvariation]);
}
return data;
}
/**
* @function
* @memberof Modifiers
* @argument {Object} data - The data object generated by update method
* @argument {Object} options - Modifiers configuration and options
* @returns {Object} The data object, properly modified
*/
function hide(data) {
if (!isModifierRequired(data.instance.modifiers, 'hide', 'preventOverflow')) {
return data;
}
var refRect = data.offsets.reference;
var bound = find(data.instance.modifiers, function (modifier) {
return modifier.name === 'preventOverflow';
}).boundaries;
if (refRect.bottom < bound.top || refRect.left > bound.right || refRect.top > bound.bottom || refRect.right < bound.left) {
// Avoid unnecessary DOM access if visibility hasn't changed
if (data.hide === true) {
return data;
}
data.hide = true;
data.attributes['x-out-of-boundaries'] = '';
} else {
// Avoid unnecessary DOM access if visibility hasn't changed
if (data.hide === false) {
return data;
}
data.hide = false;
data.attributes['x-out-of-boundaries'] = false;
}
return data;
}
/**
* @function
* @memberof Modifiers
* @argument {Object} data - The data object generated by `update` method
* @argument {Object} options - Modifiers configuration and options
* @returns {Object} The data object, properly modified
*/
function inner(data) {
var placement = data.placement;
var basePlacement = placement.split('-')[0];
var _data$offsets = data.offsets,
popper = _data$offsets.popper,
reference = _data$offsets.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 unitless, 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.
* > More on this [reading 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.
*
* An 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 has always 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 eachothers
* without leaving any gap between the two. Expecially useful when the arrow is
* enabled and you want to assure it to point 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 conjuction 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'
},
/**
* 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 you 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 informations used by Popper.js
* this object get 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 overriden using the `options` argument of Popper.js.<br />
* To override an option, simply pass as 3rd argument an object with the same
* structure of this object, 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',
/**
* 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, is set to no-op.<br />
* Access Popper.js instance with `data.instance`.
* @prop {onCreate}
*/
onCreate: function onCreate() {},
/**
* 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, is set to no-op.<br />
* Access Popper.js instance with `data.instance`.
* @prop {onUpdate}
*/
onUpdate: function onUpdate() {},
/**
* 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
// Methods
var Popper = function () {
/**
* Create a new Popper.js instance
* @class Popper
* @param {HTMLElement|referenceObject} reference - The reference element used to position the popper
* @param {HTMLElement} popper - The HTML element used as popper.
* @param {Object} options - Your custom options to override the ones defined in [Defaults](#defaults)
* @return {Object} instance - The generated Popper.js instance
*/
function Popper(reference, popper) {
var _this = this;
var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
classCallCheck(this, Popper);
this.scheduleUpdate = function () {
return requestAnimationFrame(_this.update);
};
// make update() debounced, so that it only runs at most once-per-tick
this.update = debounce(this.update.bind(this));
// with {} we create a new object with the options inside it
this.options = _extends({}, Popper.Defaults, options);
// init state
this.state = {
isDestroyed: false,
isCreated: false,
scrollParents: []
};
// get reference and popper elements (allow jQuery wrappers)
this.reference = reference.jquery ? reference[0] : reference;
this.popper = popper.jquery ? popper[0] : popper;
// Deep merge modifiers options
this.options.modifiers = {};
Object.keys(_extends({}, Popper.Defaults.modifiers, options.modifiers)).forEach(function (name) {
_this.options.modifiers[name] = _extends({}, Popper.Defaults.modifiers[name] || {}, options.modifiers ? options.modifiers[name] : {});
});
// Refactoring modifiers' list (Object => Array)
this.modifiers = Object.keys(this.options.modifiers).map(function (name) {
return _extends({
name: name
}, _this.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.reference, _this.popper, _this.options, modifierOptions, _this.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
createClass(Popper, [{
key: 'update',
value: function update$$1() {
return update.call(this);
}
}, {
key: 'destroy',
value: function destroy$$1() {
return destroy.call(this);
}
}, {
key: 'enableEventListeners',
value: function enableEventListeners$$1() {
return enableEventListeners.call(this);
}
}, {
key: 'disableEventListeners',
value: function disableEventListeners$$1() {
return disableEventListeners.call(this);
}
/**
* Schedule an update, it will run on the next UI update available
* @method scheduleUpdate
* @memberof Popper
*/
/**
* 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
*/
}]);
return Popper;
}();
/**
* 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.
*/
Popper.Utils = (typeof window !== 'undefined' ? window : global).PopperUtils;
Popper.placements = placements;
Popper.Defaults = Defaults;
return Popper;
})));
//# sourceMappingURL=popper.js.map
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