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Test Info: Warnings
- This test has a WPT meta file that expects 1 subtest issues.
- This WPT test may be referenced by the following Test IDs:
- /trusted-types/SVGScriptElement-internal-slot.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<html>
<head>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<meta http-equiv="Content-Security-Policy" content="require-trusted-types-for 'script'">
</head>
<body>
<script>
// This policy allows document.write to work as that's not relevant to what's actually being tested here.
trustedTypes.createPolicy('default', {createHTML: s => s});
promise_test(t => {
document.write(`<svg><script>window.postMessage("first script element executed", "*");`);
var manipulator = _ => {
let script = document.body.getElementsByTagName("script")[1];
if (script) {
script.appendChild(document.createTextNode('/*byapi*/'));
document.write('<\/script><script>window.parent.postMessage("second script element executed", "*");<\/script><\/svg>');
} else {
t.step_timeout(manipulator, 50);
}
}
manipulator();
// Now we'll wait for the postMessages to arrive. We expect the iframe's
// first message to be blocked by Trusted Types, since the manipulator
// above should have manipulated it (while loading). The second one should
// pass.
return new Promise((resolve, reject) => {
window.addEventListener("message", e => {
if (e.data.includes("first")) {
reject("First message should have been blocked: " + e.data);
} else if (e.data.includes("second")) {
resolve();
} else {
reject("Unknown message: " + e.data);
}
});
});
}, "Test TT application when manipulating <script> elements during loading.");
</script>
</body>
</html>