css/css-pseudo/highlight-cascade/cascade-highlight-005.html

<!DOCTYPE html>

  <meta charset="UTF-8">

  <title>CSS Pseudo-Elements Test: inheritance of selection highlight background color from its parent element</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">
  <link rel="help" href="https://www.w3.org/TR/css-pseudo-4/#highlight-cascade">
  <link rel="match" href="cascade-highlight-005-ref.html">

  <meta name="assert" content="In this test, 'background-color' has not been specified a value for the highlight pseudo-element of the span element. Since the span's parent element has an highlight pseudo-element also, then the span's background color for its highlight pseudo-element should be inherited from its parent highlight pseudo-element. Therefore the span element should have a green background color.">

  <!--

  This is a modified version of Example 11
  https://www.w3.org/TR/css-pseudo-4/#example-c35bf49a
  found in § 3.5 Cascading and Per-Element Highlight Styles
  https://www.w3.org/TR/css-pseudo-4/#highlight-cascade

  -->

  <!--
  When any supported property is not given a value by the
  cascade, its value is determined by inheritance from the
  corresponding highlight pseudo-element of its originating
  element's parent element (regardless of whether that property
  is an inherited property).
  https://www.w3.org/TR/css-pseudo-4/#highlight-cascade
  -->

  <link rel="stylesheet" href="../support/highlights.css">

  <style>
  div
    {
      font-size: 300%;
    }

  div::selection
    {
      background-color: green;
      color: yellow;
    }

  span::selection
    {
      color: orange;
    }
  </style>

  <script>
  function startTest()
  {
  var targetRange = document.createRange();
  /* We first create an empty range */
  targetRange.selectNodeContents(document.getElementById("test"));
  /* Then we set the range boundaries to the children of div#test */
  window.getSelection().addRange(targetRange);
  /* Finally, we now select such range of content */
  }
  </script>

  <body onload="startTest();">

  <p>Test passes if "Text selected" has a green background throughout, if "Tex" and "cted" are yellow and if "t sele" are orange.

  <div id="test" class="highlight_reftest">Tex<span>t sele</span>cted</div>