1226400-1.html - mozsearch

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<!DOCTYPE HTML>

<html>

<head>

<title>FontFaceSet::Load crasher</title>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<style type="text/css">

body {

  margin: 50px;

p {

  margin: 0;

  font-size: 300%;

</style>

</head>

<body>

<p>This may crash on load...</p>

<script>

var scriptText = `

  var fontFaceSet = document.fonts;

  var link = document.createElement("link");

  link.onerror = link.onload = function() {

    fontFaceSet.load("12px foo");

  link.rel = "stylesheet";

  link.href = "data:text/css,";

  document.body.appendChild(link);

`;

var styleText = `

  @font-face {

    font-family: foo;

    src: url("data:text/ttf,");

`;

var ifr = document.createElement("iframe");

document.body.appendChild(ifr);

var style = ifr.contentDocument.createElement("style");

style.textContent = styleText;

ifr.contentDocument.body.appendChild(style);

var script = ifr.contentDocument.createElement("script");

script.textContent = scriptText;

ifr.contentDocument.body.appendChild(script);

ifr.remove();

</script>

</body>

</html>