wavesurfer.js/dist/timer.js

Audio waveform player

import EventEmitter from './event-emitter.js';
class Timer extends EventEmitter {
    constructor() {
        super(...arguments);
        this.animationFrameId = null;
        this.isRunning = false;
    }
    start() {
        // Prevent multiple simultaneous loops
        if (this.isRunning)
            return;
        this.isRunning = true;
        const tick = () => {
            // Only continue if timer is still running
            if (!this.isRunning)
                return;
            this.emit('tick');
            // Schedule next frame
            this.animationFrameId = requestAnimationFrame(tick);
        };
        // Start the loop
        tick();
    }
    stop() {
        this.isRunning = false;
        // Cancel any pending animation frame
        if (this.animationFrameId !== null) {
            cancelAnimationFrame(this.animationFrameId);
            this.animationFrameId = null;
        }
    }
    destroy() {
        this.stop();
    }
}
export default Timer;