mathml/relations/css-styling/visibility-005.html

<!DOCTYPE html>
<html class="reftest-wait">
<head>
<meta charset="utf-8">
<title>visibility</title>
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<link rel="help" href="https://w3c.github.io/mathml-core/#css-styling">
<link rel="help" href="https://w3c.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
<link rel="match" href="visibility-005-ref.html"/>
<meta name="assert" content="Verify that visibility=hidden is used for normal, stretchy and large operators.">
<style>
  math {
      font: 20px/1 Ahem;
  }
  @font-face {
      font-family: operators;
      src: url("/fonts/math/operators.woff");
  }
  mo {
      font-family: operators;
  }
</style>
</head>
<body>
  <p>Test passes if you see a green square.</p>
  <div style="background: green; color: red; width: 200px; height: 200px;">
    <math>
      <!-- unstretched operators -->
      <mo style="visibility: hidden">⥯</mo>
      <mo style="visibility: hidden">+</mo>
      <mo style="visibility: hidden">-</mo>
    </math>
    <math displaystyle="true">
      <!-- large operator -->
      <mo largeop="true" style="visibility: hidden">⥯</mo>
    </math>
    <math>
      <mrow>
        <!-- stretchy, small size -->
        <mspace height="2em"/>
        <mo style="visibility: hidden">⥯</mo>
      </mrow>
    </math>
    <math>
      <mrow>
        <!-- stretchy, large size -->
        <mspace height="4em"/>
        <mo style="visibility: hidden">⥯</mo>
      </mrow>
    </math>
    <div id="dynamic">
      <math>
        <!-- unstretched operators -->
        <mo stretchy="false">⥯</mo>
        <mo>+</mo>
        <mo>-</mo>
      </math>
      <math displaystyle="true">
        <!-- large operator -->
        <mo largeop="true">⥯</mo>
      </math>
      <math>
        <mrow>
          <!-- stretchy, small size -->
          <mspace height="2em"/>
          <mo>⥯</mo>
        </mrow>
      </math>
      <math>
        <mrow>
          <!-- stretchy, large size -->
          <mspace height="4em"/>
          <mo>⥯</mo>
        </mrow>
      </math>
    </div>
  </div>
  <script src="/mathml/support/fonts.js"></script>
  <script>
    window.addEventListener("load", () => loadAllFonts().then(() => {
        document.getElementById("dynamic").style.visibility = "hidden";
        document.documentElement.classList.remove("reftest-wait");
    }));
  </script>
  <script src="/mathml/support/feature-detection.js"></script>
  <script>MathMLFeatureDetection.ensure_for_match_reftest("has_menclose");</script>
</body>
</html>