c6.js

let image = new Image();
image.onload = () => {
  
   let canvas = document.createElement('canvas');
   
   canvas.widht = width;
   
   canvas.height = height;
   let context = canvas.getContext('2d');
   // draw image in canvas starting left-0 , top - 0  
   context.drawImage(image, 0, 0, width, height );
  //  downloadImage(canvas); need to implement
};
image.src = blobURL;