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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /html/browsers/browsing-the-web/navigating-across-documents/javascript-url-side-effects.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<meta charset="utf-8">
<title>Clicking on javascript: URL links that return undefined causes side effects</title>
<link rel="author" title="Domenic Denicola" href="mailto:d@domenic.me">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
"use strict";
setup({ allow_uncaught_exception: true });
for (const encoded of [false, true]) {
promise_test(async t => {
t.add_cleanup(() => {
delete window.javascriptURLDone;
});
let ran = false;
const completed = new Promise(resolve => {
window.javascriptURLDone = () => {
ran = true;
resolve();
};
});
const code = "window.javascriptURLDone(); void 0";
location.href = `javascript:${encoded ? encodeURIComponent(code) : code}`;
assert_false(ran, "Execution is asynchronous");
await completed;
}, `javascript: URL side effects with percent encoding: ${encoded}`);
}
promise_test(async t => {
let errorDelivered = false;
const errorPromise = new Promise(resolve => {
function listener(ev) {
errorDelivered = true;
resolve(ev.error);
}
window.addEventListener("error", listener, { once: true });
t.add_cleanup(() => window.removeEventListener("error", listener));
});
location.href = "javascript:%+#@?";
assert_false(errorDelivered, "Syntax errors are reported asynchronously");
assert_true(await errorPromise instanceof SyntaxError);
}, "A javascript: URL with invalid code reports a SyntaxError");
</script>