import dataURItoBlob from './dataURItoBlob';

/**
 * Save a <canvas> element's content to a Blob object.
 *
 * @param {HTMLCanvasElement} canvas
 * @returns {Promise}
 */
export default function canvasToBlob(canvas, type, quality) {
  if (canvas.toBlob) {
    return new Promise(function (resolve) {
      canvas.toBlob(resolve, type, quality);
    });
  }
  return Promise.resolve().then(function () {
    return dataURItoBlob(canvas.toDataURL(type, quality), {});
  });
}