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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;
}
</style>
<div id="host"></div>
<script>
var vw = document.documentElement.clientWidth;
var vh = document.documentElement.clientHeight;
var entries = [];
var target;
runTestCycle(function() {
var shadowHost = document.getElementById("host");
assert_true(!!shadowHost, "Host exists");
var shadowRoot = shadowHost.attachShadow({ mode: "open" });
assert_true(!!shadowRoot, "Shadow root exists");
shadowRoot.innerHTML = "<div id='target' style='width: 100px; height: 100px; background-color: green;'></div>";
target = shadowRoot.getElementById("target");
assert_true(!!target, "target exists");
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.");
runTestCycle(step0, "First rAF after creating shadow DOM.");
}, "Observing a target inside shadow DOM.");
function step0() {
checkLastEntry(entries, 0, [8, 108, 8, 108, 8, 108, 8, 108, 0, vw, 0, vh, true]);
}
</script>
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