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<!DOCTYPE html>
<html class="reftest-wait">
<script>
function loadHandler() {
var outer = document.getElementById("outer");
var inner = document.createElement("iframe");
inner.height = "1px";
outer.contentDocument.body.appendChild(inner);
// Flush reflow inside our inner iframe. This ensures that our inner.height
// tweak further down will actually invoke the resize handler.
inner.contentWindow.offsetTop;
// Set up resize handler (which ends the test, one way or another)
inner.contentWindow.onresize = () => {
outer.remove();
document.documentElement.removeAttribute("class");
};
// Trigger the resize handler:
inner.height = "5px";
inner.offsetTop;
}
// This function is a hack to avoid sporadic test-failures with...
// "...timed out waiting for reftest-wait to be removed".
// Occasionally, it seems this test loses a race condition of some sort, and
// its resize handler isn't invoked. When that happens (and specifically, when
// the test runs for longer than 500ms), we clear reftest-wait and call the
// run a "pass" (which is kind of valid, because we didn't crash!) and move on.
function setupFailsafe() {
setTimeout(() => {
document.documentElement.removeAttribute("class");
}, 500);
}
</script>
<body onload="setupFailsafe()">
<iframe id="outer"
src="data:text/html,<html><body>"
onload="loadHandler()">
</iframe>
</body>
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