File: display-and-column-properties.html

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<!DOCTYPE html>
<html class="test-wait">
  <head>
    <title>MathML elements with display and column properties</title>
    <meta charset="utf-8"/>
    <style>
      math {
          column-width: 100px;
      }
    </style>
  </head>
  <body>
    <math></math>
    <math style="display: list-item"></math>
    <script>
      window.addEventListener("load", function() {
          // Force initial layout.
          document.documentElement.getBoundingClientRect();

          // Change display and reforce layout.
          let maths = document.getElementsByTagName("math");
          maths[0].setAttribute("style", "display: list-item");
          maths[1].removeAttribute("style");
          document.documentElement.getBoundingClientRect();

          document.documentElement.classList.remove("test-wait");
      });
    </script>
  </body>
</html>