ntainer size</div>
  <script>
    let r1 = new Range();
    r1.setStart(h1, 0);
    r1.setEnd(h1, 1);
    let r2 = new Range();
    r2.setStart(h2, 0);
    r2.setEnd(h2, 1);
    CSS.highlights.set("highlight1", new Highlight(r1, r2));
  </script>
</body>
