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// This creates a serialized <script> element that is useful for blob/data/srcdoc-style tests.
function createScript(sameOrigin, crossOrigin, type="parent", id="") {
return `const data = { id: "${id}",
opener: !!window.opener,
origin: window.origin,
sameOriginNoCORPSuccess: false,
crossOriginNoCORPFailure: false };
function record(promise, token, expectation) {
return promise.then(() => data[token] = expectation, () => data[token] = !expectation);
}
const records = [
record(fetch("${crossOrigin}/common/blank.html", { mode: "no-cors" }), "crossOriginNoCORPFailure", false)
];
if ("${sameOrigin}" !== "null") {
records.push(record(fetch("${sameOrigin}/common/blank.html", { mode: "no-cors" }), "sameOriginNoCORPSuccess", true));
}
Promise.all(records).then(() => {
// Using BroadcastChannel is useful for blob: URLs, which are always same-origin
if ("${type}" === "channel") {
const bc = new BroadcastChannel("${id}");
bc.postMessage(data);
} else {
window.${type}.postMessage(data, "*");
}
});`;
}