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/**
* --------------------------------------------------------------------------
* Bootstrap (v4.3.1): util.js
* Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
* --------------------------------------------------------------------------
*/
import EventHandler from './dom/eventHandler'
/**
* ------------------------------------------------------------------------
* Private TransitionEnd Helpers
* ------------------------------------------------------------------------
*/
const TRANSITION_END = 'transitionend'
const MAX_UID = 1000000
const MILLISECONDS_MULTIPLIER = 1000
// Shoutout AngusCroll (https://goo.gl/pxwQGp)
function toType(obj) {
return {}.toString.call(obj).match(/\s([a-z]+)/i)[1].toLowerCase()
}
const Util = {
TRANSITION_END: 'bsTransitionEnd',
getUID(prefix) {
do {
// eslint-disable-next-line no-bitwise
prefix += ~~(Math.random() * MAX_UID) // "~~" acts like a faster Math.floor() here
} while (document.getElementById(prefix))
return prefix
},
getSelectorFromElement(element) {
let selector = element.getAttribute('data-target')
if (!selector || selector === '#') {
const hrefAttr = element.getAttribute('href')
selector = hrefAttr && hrefAttr !== '#' ? hrefAttr.trim() : ''
}
try {
return document.querySelector(selector) ? selector : null
} catch (err) {
return null
}
},
getTransitionDurationFromElement(element) {
if (!element) {
return 0
}
// Get transition-duration of the element
let transitionDuration = $(element).css('transition-duration')
let transitionDelay = $(element).css('transition-delay')
const floatTransitionDuration = parseFloat(transitionDuration)
const floatTransitionDelay = parseFloat(transitionDelay)
// Return 0 if element or transition duration is not found
if (!floatTransitionDuration && !floatTransitionDelay) {
return 0
}
// If multiple durations are defined, take the first
transitionDuration = transitionDuration.split(',')[0]
transitionDelay = transitionDelay.split(',')[0]
return (parseFloat(transitionDuration) + parseFloat(transitionDelay)) * MILLISECONDS_MULTIPLIER
},
reflow(element) {
return element.offsetHeight
},
triggerTransitionEnd(element) {
EventHandler.trigger(element, Util.TRANSITION_END)
},
// TODO: Remove in v5
supportsTransitionEnd() {
return Boolean(TRANSITION_END)
},
isElement(obj) {
return (obj[0] || obj).nodeType
},
emulateTransitionEnd(element, duration) {
setTimeout(() => {
Util.triggerTransitionEnd(element)
}, duration)
},
typeCheckConfig(componentName, config, configTypes) {
for (const property in configTypes) {
if (Object.prototype.hasOwnProperty.call(configTypes, property)) {
const expectedTypes = configTypes[property]
const value = config[property]
const valueType = value && Util.isElement(value)
? 'element' : toType(value)
if (!new RegExp(expectedTypes).test(valueType)) {
throw new Error(
`${componentName.toUpperCase()}: ` +
`Option "${property}" provided type "${valueType}" ` +
`but expected type "${expectedTypes}".`)
}
}
}
},
findShadowRoot(element) {
if (!document.documentElement.attachShadow) {
return null
}
// Can find the shadow root otherwise it'll return the document
if (typeof element.getRootNode === 'function') {
const root = element.getRootNode()
return root instanceof ShadowRoot ? root : null
}
if (element instanceof ShadowRoot) {
return element
}
// when we don't find a shadow root
if (!element.parentNode) {
return null
}
return Util.findShadowRoot(element.parentNode)
}
}
export default Util
|
