whitespace-reframe.html

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This WPT test may be referenced by the following Test IDs:
- /css/css-ruby/crashtests/whitespace-reframe.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

<head>

<meta charset="utf-8">

<title>Firefox bug 2064785 - ruby ::before whitespace-flag re-entry UAF</title>

<style>

  #p::before { display: ruby; content: "a"; }

  #p.swap::before { content: " "; }

</style>

</head>

<body>

<div id="p"></div>

<script>

  const p = document.getElementById('p');

  // Flush initial layout with ::before ruby content "a"

  document.body.offsetHeight;

  // Add class so that ::before content becomes " "

  p.classList.add('swap');

  // Force reflow with the generated content that is now whitespace-only

  document.body.offsetHeight;

</script>

</body>

</html>