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WebKit export of https://bugs.webkit.org/show_bug.cgi?id=298792 #55736

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Merged
merged 1 commit into from
Nov 4, 2025
Merged

WebKit export of https://bugs.webkit.org/show_bug.cgi?id=298792 #55736

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20 changes: 20 additions & 0 deletions trusted-types/navigate-to-javascript-url-008.html
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Original file line number Diff line number Diff line change
@@ -0,0 +1,20 @@
<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/rendering-utils.js"></script>
<script src="./support/csp-violations.js"></script>
<script src="./support/navigation-support.js"></script>
<script>
promise_test(async _ => {
await new Promise(resolve => window.addEventListener("load", resolve));
const result = await setLocationToJavaScriptURL("throw" /* defaultpolicy */);
// This is odd but CSP pre-navigation checks on report-only directives cannot block navigation.
assert_true(result.javaScriptExecuted, "JavaScript should have been executed");
assert_equals(result.violations.length, 1);
const violation = result.violations[0];
assert_equals(violation.violatedDirective, "require-trusted-types-for");
assert_equals(violation.disposition, "report");
assert_equals(violation.sample, `Location href|${clipSampleIfNeeded(kJavaScriptURLCode)}`);
assert_equals(result.exception, null, "No exception");
}, "Setting window.location to a javascript: URL with a default policy that throws should report a CSP violation without rethrowing the exception.");
</script>
3 changes: 3 additions & 0 deletions trusted-types/navigate-to-javascript-url-008.html.headers
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@@ -0,0 +1,3 @@

Content-Security-Policy: connect-src 'none';
Content-Security-Policy-Report-Only: require-trusted-types-for 'script'
7 changes: 7 additions & 0 deletions trusted-types/support/navigation-support.js
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Expand Up @@ -60,6 +60,8 @@ async function setLocationToJavaScriptURL(defaultpolicy) {
// pre-navigation check CSP violation.
if (window.requestIdleCallback) {
await new Promise(resolve => requestIdleCallback(resolve));
} else {
await new Promise(resolve => requestAnimationFrame(_ => requestAnimationFrame(resolve)));
}
});

Expand Down Expand Up @@ -188,6 +190,11 @@ function navigateToJavascriptURL(reportOnly) {
requestIdleCallback(resolve);
window.addEventListener("beforeunload", resolve);
});
} else {
await new Promise(resolve => requestAnimationFrame(() => {
requestAnimationFrame(resolve);
window.addEventListener("beforeunload", resolve);
}));
}
});
if (exception) {
Expand Down