wpt/css/css-pseudo/highlight-cascade/highlight-currentcolor-root-implicit-default-002.html at master · web-platform-tests/wpt

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<!doctype html>
<meta charset="utf-8">
<title>CSS Pseudo-Elements Test: implicit defaulting of ‘color’ in :root highlights</title>
<meta name="assert" content="Checks the painting for ::selection and ::highlight, when ‘background-color’ is set in the target element but ‘color’ is implicitly defaulted. ‘background-color’ suppresses the UA default ‘color’ for ::selection via paired cascade. The resultant ‘color’ inherits through ancestor highlight pseudos up to the root, where the inherited value is defined as ‘currentColor’ for highlights, yielding green.">
<link rel="author" title="Delan Azabani" href="mailto:dazabani@igalia.com">
<link rel="help" href="https://drafts.csswg.org/css-pseudo/#highlight-selectors">
<link rel="match" href="highlight-currentcolor-root-implicit-default-ref.html">
<p>Pass if text below is green on lime, and the text itself represents green, not initial (black).</p>
<main>FAIL</main>
<main>FAIL</main>
  main { color: green; }
  main::selection { background-color: lime; }
  main::highlight(foo) { background-color: lime; }
  const [selection, highlight] = document.querySelectorAll("main");
  let selectionRange = new Range();
  selectionRange.selectNode(selection);
  window.getSelection().addRange(selectionRange);
  selection.textContent = getComputedStyle(selection, "::selection").color;
  let highlightRange = new Range();
  highlightRange.selectNode(highlight);
  CSS.highlights.set("foo", new Highlight(highlightRange));
  highlight.textContent = getComputedStyle(highlight, "::highlight(foo)").color;

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