@aws-amplify/analytics/lib/vendor/dom-utils/dispatch.js

Analytics category of aws-amplify

"use strict";
/**
 * Copyright (c) 2017, Philip Walton <philip@philipwalton.com>
 */
Object.defineProperty(exports, "__esModule", { value: true });
/**
 * Dispatches an event on the passed element.
 * @param {!Element} element The DOM element to dispatch the event on.
 * @param {string} eventType The type of event to dispatch.
 * @param {Object|string=} eventName A string name of the event constructor
 *     to use. Defaults to 'Event' if nothing is passed or 'CustomEvent' if
 *     a value is set on `initDict.detail`. If eventName is given an object
 *     it is assumed to be initDict and thus reassigned.
 * @param {Object=} initDict The initialization attributes for the
 *     event. A `detail` property can be used here to pass custom data.
 * @return {boolean} The return value of `element.dispatchEvent`, which will
 *     be false if any of the event listeners called `preventDefault`.
 */
function dispatch(element, eventType, evtName, init_dict) {
    if (evtName === void 0) { evtName = 'Event'; }
    if (init_dict === void 0) { init_dict = {}; }
    var event;
    var isCustom;
    var initDict = init_dict;
    var eventName = evtName;
    // eventName is optional
    if (typeof eventName === 'object') {
        initDict = eventName;
        eventName = 'Event';
    }
    initDict['bubbles'] = initDict['bubbles'] || false;
    initDict['cancelable'] = initDict['cancelable'] || false;
    initDict['composed'] = initDict['composed'] || false;
    // If a detail property is passed, this is a custom event.
    if ('detail' in initDict)
        isCustom = true;
    eventName = isCustom ? 'CustomEvent' : eventName;
    // Tries to create the event using constructors, if that doesn't work,
    // fallback to `document.createEvent()`.
    try {
        event = new window[eventName](eventType, initDict);
    }
    catch (err) {
        event = document.createEvent(eventName);
        var initMethod = 'init' + (isCustom ? 'Custom' : '') + 'Event';
        event[initMethod](eventType, initDict['bubbles'], initDict['cancelable'], initDict['detail']);
    }
    return element.dispatchEvent(event);
}
exports.dispatch = dispatch;
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