listeners.ts

1	export interface Listener {
2	element: Element;
3	type: string;
4	listener: (event: Event) => void;
5	}
6
7	export class ListenerManager {
8	private listeners: Listener[] = [];
9
10	public addListener(element: Element, type: string, listener: (event: Event) => void): void {
11	const { listeners } = this;
12	element.addEventListener(type, listener);
13	listeners.push({ element, type, listener });
14	}
15
16	public removeListeners() {
17	const { listeners } = this;
18	listeners.forEach(value => {
19	const { element, type, listener } = value;
20	element.removeEventListener(type, listener);
21	});
22	listeners.length = 0;
23	}
24	}