toosoon-events/lib/raf.js

Project providing services implemented as singleton class instances

import { EventManager } from './index';
/**
 * Utility class for creating `requestAnimationFrame` listeners
 *
 * @class RafManager
 * @extends EventManager<RafListener>
 */
class RafManager extends EventManager {
    time = 0;
    _rafId;
    bind() {
        this.time = Date.now();
        this._rafId = requestAnimationFrame(this._onUpdate);
    }
    unbind() {
        cancelAnimationFrame(this._rafId);
        this._rafId = 0;
    }
    update = () => {
        const time = Date.now();
        const delta = (time - this.time) / 1000;
        this.time = time;
        this.emit(time, delta);
    };
    _onUpdate = () => {
        this.update();
        this._rafId = requestAnimationFrame(this._onUpdate);
    };
}
export default new RafManager();