insert-dir-rule-crash.html

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<!DOCTYPE html>

<title>CSSOM Test: Chrome crash inserting :dir rule</title>

<link rel="help" href="https://crbug.com/1486351">

<p>PASS if no crash.</p>

<style id="sheet"> </style>

<div id="host"></div>

<script>

  let root = host.attachShadow({mode:"open"});

  root.innerHTML = "<slot></slot>";

  host.offsetTop;

  host.innerHTML = "<span>Green</span>";

  sheet.sheet.insertRule("html:dir(ltr) { color: green; }");

  document.fonts.size();

</script>