dynamic-change-with-overflow-1.html

Enable keyboard shortcuts

<!DOCTYPE html>

<html class="reftest-wait">

  <div style="overflow: hidden; width: 130px">

    Some long text that cannot possibly fit in 130px.

  </div>

  <script>

    onload = function() {

      var div = document.querySelector("div");

      // Make sure layout has happened.

      window.width = div.offsetWidth;

      div.style.columnCount = "2";

      document.documentElement.className = "";

  </script>

</html>