var img = new Image();

var canvas = document.createElement('canvas');

var resCanvas = document.createElement('canvas');

var isReady = false;

​

var frameRaw1 = null;

var frameRaw2 = null;

var result = null;

​

img.addEventListener('load', function() {

    createImageBitmap(img).then(function(imageBitmap) {

      frameRaw2 = imageBitmap;

      canvas.width = frameRaw2.width;

      canvas.height = frameRaw2.height;

      frameRaw1 = canvas.getContext('2d');

      resCanvas.width = frameRaw2.width;

      resCanvas.height = frameRaw2.height;

      result = resCanvas.getContext('2d');

      isReady = true;

    });

});

​

img.src = 'https://www.apple.com/105/media/us/airpods-pro/2019/1299e2f5_9206_4470_b28e_08307a42f19b/anim/sequence/large/01-hero-lightpass/0025.jpg';