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// Make sure that the load event for an iframe doesn't fire at the
// point when a navigation triggered by document.write() starts in it,
// but rather when that navigation completes.
async_test(t => {
const frame = document.body.appendChild(document.createElement("iframe"));
const doc = frame.contentDocument;
const url = URL.createObjectURL(new Blob(["PASS"], { type: "text/html"}));
frame.onload = t.step_func_done(() => {
assert_equals(frame.contentDocument.body.textContent, "PASS",
"Why is our load event firing before the new document loaded?");
});
doc.open();
doc.write(`FAIL<script>location = "${url}"</` + "script>");
doc.close();
}, "Setting location from document.write() call should not trigger load event until that load completes");
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