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* --------------------------------------------------------------------------\n * Bootstrap (v4.0.0-alpha.3): util.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)\n * --------------------------------------------------------------------------\n */\n\nconst Util = (($) => {\n\n\n /**\n * ------------------------------------------------------------------------\n * Private TransitionEnd Helpers\n * ------------------------------------------------------------------------\n */\n\n let transition = false\n\n const MAX_UID = 1000000\n\n const TransitionEndEvent = {\n WebkitTransition : 'webkitTransitionEnd',\n MozTransition : 'transitionend',\n OTransition : 'oTransitionEnd otransitionend',\n transition : 'transitionend'\n }\n\n // shoutout AngusCroll (https://goo.gl/pxwQGp)\n function toType(obj) {\n return ({}).toString.call(obj).match(/\\s([a-zA-Z]+)/)[1].toLowerCase()\n }\n\n function isElement(obj) {\n return (obj[0] || obj).nodeType\n }\n\n function getSpecialTransitionEndEvent() {\n return {\n bindType: transition.end,\n delegateType: transition.end,\n handle(event) {\n if ($(event.target).is(this)) {\n return event.handleObj.handler.apply(this, arguments) // eslint-disable-line prefer-rest-params\n }\n return undefined\n }\n }\n }\n\n function transitionEndTest() {\n if (window.QUnit) {\n return false\n }\n\n let el = document.createElement('bootstrap')\n\n for (let name in TransitionEndEvent) {\n if (el.style[name] !== undefined) {\n return { end: TransitionEndEvent[name] }\n }\n }\n\n return false\n }\n\n function transitionEndEmulator(duration) {\n let called = false\n\n $(this).one(Util.TRANSITION_END, () => {\n called = true\n })\n\n setTimeout(() => {\n if (!called) {\n Util.triggerTransitionEnd(this)\n }\n }, duration)\n\n return this\n }\n\n function setTransitionEndSupport() {\n transition = transitionEndTest()\n\n $.fn.emulateTransitionEnd = transitionEndEmulator\n\n if (Util.supportsTransitionEnd()) {\n $.event.special[Util.TRANSITION_END] = getSpecialTransitionEndEvent()\n }\n }\n\n\n /**\n * --------------------------------------------------------------------------\n * Public Util Api\n * --------------------------------------------------------------------------\n */\n\n let Util = {\n\n TRANSITION_END: 'bsTransitionEnd',\n\n getUID(prefix) {\n do {\n /* eslint-disable no-bitwise */\n prefix += ~~(Math.random() * MAX_UID) // \"~~\" acts like a faster Math.floor() here\n /* eslint-enable no-bitwise */\n } while (document.getElementById(prefix))\n return prefix\n },\n\n getSelectorFromElement(element) {\n let selector = element.getAttribute('data-target')\n\n if (!selector) {\n selector = element.getAttribute('href') || ''\n selector = /^#[a-z]/i.test(selector) ? selector : null\n }\n\n return selector\n },\n\n reflow(element) {\n new Function('bs', 'return bs')(element.offsetHeight)\n },\n\n triggerTransitionEnd(element) {\n $(element).trigger(transition.end)\n },\n\n supportsTransitionEnd() {\n return Boolean(transition)\n },\n\n typeCheckConfig(componentName, config, configTypes) {\n for (let property in configTypes) {\n if (configTypes.hasOwnProperty(property)) {\n let expectedTypes = configTypes[property]\n let value = config[property]\n let valueType\n\n if (value && isElement(value)) {\n valueType = 'element'\n } else {\n valueType = toType(value)\n }\n\n if (!new RegExp(expectedTypes).test(valueType)) {\n throw new Error(\n `${componentName.toUpperCase()}: ` +\n `Option \"${property}\" provided type \"${valueType}\" ` +\n `but expected type \"${expectedTypes}\".`)\n }\n }\n }\n }\n }\n\n setTransitionEndSupport()\n\n return Util\n\n})(jQuery)\n\nexport default Util\n"]}
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