<!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>
body { margin: 0 }
pre, #log {
position: absolute;
top: 0;
left: 200px;
}
#target {
background-color: green;
width: 100px;
height: 100px;
}
#container {
padding: 8px;
width: 0px;
height: 0px;
}
</style>
<div id="container">
<div id="target"></div>
</div>
<script>
var vw = document.documentElement.clientWidth;
var vh = document.documentElement.clientHeight;
var entries = [];
promise_test(async function(t) {
var target = document.getElementById("target");
var container = document.getElementById("container");
var root = document.getElementById("root");
var observer = new IntersectionObserver(function(changes) {
entries = entries.concat(changes)
});
observer.observe(target);
entries = entries.concat(observer.takeRecords());
assert_equals(entries.length, 0, "No initial notifications.");
await waitForNotification();
checkLastEntry(
entries,
0,
[8, 108, 8, 108, 8, 108, 8, 108, 0, vw, 0, vh, true],
);
container.style.clipPath = "inset(1000px)";
await waitForNotification();
checkLastEntry(
entries,
1,
[8, 108, 8, 108, 0, 0, 0, 0, 0, vw, 0, vh, false],
);
container.style.clipPath = "";
await waitForNotification();
checkLastEntry(
entries,
2,
[8, 108, 8, 108, 8, 108, 8, 108, 0, vw, 0, vh, true],
);
});
</script>
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