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LibWeb: Implement the HostEnsureCanAddPrivateElement JS hook

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Also added a local test for ensuring this behavior since it is unique to
browsers. Since we don't actually use WindowProxy anywhere yet we just
test on location for now.
This commit is contained in:
davidot 2022-08-27 14:35:54 +02:00 • committed by Linus Groh
parent 12300b7d0b
commit ba5bcb67a5
3 changed files with 87 additions and 11 deletions
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63
Base/res/html/misc/private-element-test.html Normal file
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<html>
<body>
<span
>If passed, the text below should say: "Passed" And the iframe should have loaded</span
>
<div id="result">Starting up</div>
<script>
class Base {
constructor(o) {
return o;
}
}
class Stamper extends Base {
#x = 10;
static hasX(o) {
return #x in o;
}
}
let failed = false;
function status(text, fail = false) {
console.log("Status", text, fail, failed);
const output = document.getElementById("result");
if (fail) {
output.innerHTML += "Fail: " + text + "<br />";
output.style.color = "red";
failed = true;
} else if (!failed) {
output.innerHTML = text;
output.style.color = "blue";
}
}
function fail(text) {
return status(text, true);
}
status("Running");
const iframe = document.body.appendChild(document.createElement("iframe"));
iframe.src = "file:///res/html/misc/welcome.html";
iframe.onload = () => {
status("Inside onload", false);
// FIXME: Also test on contentWindow itself once that is an actual WindowProxy.
const locationObject = iframe.contentWindow.location;
try {
new Stamper(locationObject);
fail("Should have thrown type error!");
} catch (e) {
if (!(e instanceof TypeError))
fail("Should have thrown type error! But threw: " + e);
}
if (Stamper.hasX(locationObject)) {
fail("Stamped #x on Location");
} else {
status("Passed");
}
};
status("Set src and onload, waiting for onload");
</script>
</body>
</html>