(async _ => {
  try {
    const screenshots = await screenshot();
    for (const screenshot of screenshots) {
      // do stuff with ImageData
      console.log(screenshot);
      const canvas = document.createElement('canvas');
      const ctx = canvas.getContext('2d');
      canvas.width = screenshot.width;
      canvas.height = screenshot.height;
      ctx.putImageData(screenshot, 0, 0);
      document.body.appendChild(canvas);
    }  
  } catch(e) {
      throw e;
  }
})()
.catch(e => {
  console.error(e);
  console.trace();
});