逐渐切换静音/取消静音视频的音频

Question

With this code I want to toggle mute/unmute a playing video's Audio with a fadeIn fadeOut effect:

const btn = document.getElementById('mute'),
      video = document.querySelector('#video_mainhub');

btn.addEventListener('click', () => {
  if (btn.value === 'unmuted') {
    btn.value = 'muted';
    btn.innerHTML = '<i class="fas fa-volume-mute"></i>';
    $('#video_mainhub').animate({volume: 0}, 1000);
    video.muted = true;
  } else {
    btn.value = 'unmuted';
    btn.innerHTML = '<i class="fas fa-volume-up"></i>';
    $('#video_mainhub').animate({volume: 1}, 1000);
    video.muted = false;
  }
});

<a id="mute" value="muted"><i class="fas fa-volume-mute"></i></a>

However, it is not working, anything I'm doing wrong?

Thanks.

Answer 1

A few things we can identify and improve.

• Anchor elements do not have a value attribute so btn.value = 'muted' amounts to nothing
• Make use of jQuery to simplify matters at hand.
• We can toggle the icon class rather than replace the innerHTML which can be expensive in the grand scheme of things.
• I wouldn't rely on .animate() to modify the volume. But that opens another avenue and for demonstration purposes we'll stick to what you know.

Try this.

 const $btn = $('#mute'), $video = $('#video_mainhub') let isAnimating = false $btn.on('click', () => { if (isAnimating) return let video = $video[0] let volumeTo; if (video.muted) { video.muted = false video.volume = 0 } if (video.volume > 0) volumeTo = 0 else if (video.volume < 1) volumeTo = 1 // Toggle icon $btn.find('.fas') .removeClass(volumeTo === 1 ? 'fa-volume-mute' : 'fa-volume-up') .addClass(volumeTo !== 1 ? 'fa-volume-mute' : 'fa-volume-up') // Toggle volume isAnimating = true $video.stop(true, true).animate( {volume: volumeTo}, 1000, () => isAnimating = false ) }) 

 <link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.9.0/css/all.min.css" rel="stylesheet"/> <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <video id="video_mainhub" playsinline autoplay muted controls width="400" src="https://cdn.plyr.io/static/demo/View_From_A_Blue_Moon_Trailer-576p.mp4"></video> <a id="mute"><i class="fas fa-volume-mute"></i></a>