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/**
* @abstract
* @implements {EventTarget}
*/
export class AbstractEventTarget {
constructor() {
this.listeners = {};
}
addEventListener(type, callback, _options) {
if (!this.listeners[type]) {
this.listeners[type] = [];
}
this.listeners[type].push(callback);
}
dispatchEvent(event) {
if (!this.listeners[event.type] || this.listeners[event.type].length === 0) {
return true;
}
this.listeners[event.type].forEach(listener => {
listener(event);
});
return true;
}
removeEventListener(type, callback, _options) {
if (!this.listeners[type]) {
return;
}
const index = this.listeners[type].indexOf(callback);
if (index !== -1) {
this.listeners[type].splice(index, 1);
}
}
}
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