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bayotop/CSP.html

Created August 7, 2017 11:52
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Chrome + CSP 'strict-dynamic' + <link rel=preloaded as=script href=... />
Raw
CSP.html
<!DOCTYPE html>
<head>
<title>CSP strict-dynamic + preload link in Chrome</title>
<meta http-equiv="Content-Security-Policy" content="script-src 'nonce-123' 'strict-dynamic'" />
</head>
<body>
<script nonce="123">
var f = document.createElement("link");
f.rel = "preload"; // prefetch works perfectly fine
f.href = "/foo.js"
f.as = "script";
document.head.appendChild(f)
</script>
<!-- preloaded foo.js is never fetched as a CSP violation is triggered in latest Chrome (Version 60.0.3112.90 (Official Build) (64-bit)) -->
</body>
</html>
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