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<!DOCTYPE html>
<meta name="viewport" content="width=device-width,initial-scale=1">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="./resources/intersection-observer-test-utils.js"></script>
<style>
pre, #log {
position: absolute;
top: 0;
left: 200px;
}
iframe {
height: 250px;
width: 150px;
border: 0;
}
</style>
<iframe id="target-iframe" src="resources/iframe-no-root-subframe.html"></iframe>
<script>
var iframe = document.getElementById("target-iframe");
var target;
var root;
var entries = [];
iframe.onload = function() {
runTestCycle(function() {
assert_true(!!iframe, "iframe exists");
target = iframe.contentDocument.getElementById("target");
assert_true(!!target, "Target element exists.");
var observer = new IntersectionObserver(function(changes) {
entries = entries.concat(changes)
}, { root: iframe.contentDocument });
observer.observe(target);
entries = entries.concat(observer.takeRecords());
assert_equals(entries.length, 0, "No initial notifications.");
runTestCycle(step0, "First rAF.");
}, "Observer with explicit root which is the document.");
};
function step0() {
let vw = iframe.contentDocument.documentElement.clientWidth;
let vh = iframe.contentDocument.documentElement.clientHeight;
// The target element is partially clipped by the iframe's root scroller, so
// height of the intersection rect is (250 - 208) == 42.
checkLastEntry(entries, 0, [8, 108, 208, 308, 8, 108, 208, 250, 0, vw, 0, vh, true]);
}
</script>
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