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function formUsesTargetBlank(submitter) {
if (submitter.formTarget && submitter.formTarget === "_blank") {
return true;
}
if (submitter.form && submitter.form.target === "_blank") {
return true;
}
if (submitter.target && submitter.target === "_blank") {
return true;
}
if (submitter.getRootNode().querySelector("base").target === "_blank") {
return true;
}
return false;
}
function relTester(submitter, channelInput, title) {
[
{
rel: "",
exposed: "all"
},
{
rel: "noopener",
exposed: "noopener"
},
{
rel: "noreferrer",
exposed: "noreferrer"
},
{
rel: "opener",
exposed: "all"
},
{
rel: "noopener noreferrer",
exposed: "noreferrer"
},
{
rel: "noreferrer opener",
exposed: "noreferrer"
},
{
rel: "opener noopener",
exposed: "noopener"
}
].forEach(relTest => {
// Use promise_test to submit only after one test concluded
promise_test(t => {
return new Promise(resolve => {
const channelName = Date.now() + relTest.rel,
channel = new BroadcastChannel(channelName);
let form = submitter;
if (submitter.localName !== "form") {
form = submitter.form;
}
form.rel = relTest.rel;
channelInput.value = channelName;
if (submitter.localName !== "form") {
submitter.click();
} else {
submitter.submit();
}
channel.onmessage = t.step_func(e => {
if (relTest.exposed === "all" || relTest.exposed === "noopener") {
assert_equals(e.data.referrer, window.location.href, "referrer");
} else {
assert_equals(e.data.referrer, "", "referrer");
}
// When rel is not explicitly given, account for target=_blank defaulting to noopener
if (relTest.exposed === "all" && !(relTest.rel === "" && formUsesTargetBlank(submitter))) {
assert_true(e.data.haveOpener, "opener");
} else {
assert_false(e.data.haveOpener, "opener");
}
resolve();
});
t.add_cleanup(() => channel.postMessage(null));
});
}, `<form rel="${relTest.rel}"> with ${title}`);
});
}
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