const canvas = document.createElement('canvas');
        const img = new Image();
        img.crossOrigin = 'anonymous';
        img.src = href;
        img.onerror = () => reject(new Error(`Could not load ${href}`));
        img.onload = () => {
          canvas.width = img.width;
          canvas.height = img.height;
          canvas.getContext('2d').drawImage(img, 0, 0);
          image.setAttributeNS('http://www.w3.org/1999/xlink', 'href', canvas.toDataURL('image/png'));
          resolve(true);
        };