@twilio/voice-sdk/esm/twilio/shims/eventtarget.js

Twilio's JavaScript Voice SDK

// @ts-nocheck
import { EventEmitter } from 'events';
function EventTarget() {
    Object.defineProperties(this, {
        _eventEmitter: { value: new EventEmitter() },
        _handlers: { value: {} },
    });
}
EventTarget.prototype.dispatchEvent = function dispatchEvent(event) {
    return this._eventEmitter.emit(event.type, event);
};
EventTarget.prototype.addEventListener = function addEventListener() {
    return this._eventEmitter.addListener(...arguments);
};
EventTarget.prototype.removeEventListener = function removeEventListener() {
    return this._eventEmitter.removeListener(...arguments);
};
EventTarget.prototype._defineEventHandler = function _defineEventHandler(eventName) {
    const self = this;
    Object.defineProperty(this, `on${eventName}`, {
        get() {
            return self._handlers[eventName];
        },
        set(newHandler) {
            const oldHandler = self._handlers[eventName];
            if (oldHandler
                && (typeof newHandler === 'function'
                    || typeof newHandler === 'undefined'
                    || newHandler === null)) {
                self._handlers[eventName] = null;
                self.removeEventListener(eventName, oldHandler);
            }
            if (typeof newHandler === 'function') {
                self._handlers[eventName] = newHandler;
                self.addEventListener(eventName, newHandler);
            }
        },
    });
};
export default EventTarget;
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