画面をスクショするブックマークレット

screenshot.bookmarklet.js

javascript: (function () {
  const src = 'https://cdnjs.cloudflare.com/ajax/libs/html2canvas/0.4.1/html2canvas.js';
  const script = document.createElement('script');
  script.type = 'text/javascript';
  script.src = src;
  script.onload = () => {
    html2canvas(document.body, {
      onrendered: (canvas) => {
        const imgageData = canvas.toDataURL('image/png');
        const el = document.createElement('a');
        el.setAttribute('href', imgageData.replace(/^data:image\/png/, 'data:application/octet-stream'));
        el.setAttribute('download', 'screen.png');
        el.style.display = 'none';
        document.body.appendChild(el);
        el.click();
        document.body.removeChild(el);
      }
    });
  };
  document.body.appendChild(script);
})()