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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>
body, html {
margin: 0;
}
pre, #log {
position: absolute;
top: 0;
left: 200px;
}
.relpos {
position: relative;
}
</style>
<div id="target" class="relpos">
<div class="relpos">
<img border="0" width="100" height="100" src=""/>
</div>
</div>
<script>
var delay = 100;
var entries = [];
var target;
runTestCycle(function() {
target = document.getElementById("target");
assert_true(!!target, "target exists");
var observer = new IntersectionObserver(function(changes) {
entries = entries.concat(changes)
}, {trackVisibility: true, delay: delay});
observer.observe(target);
entries = entries.concat(observer.takeRecords());
assert_equals(entries.length, 0, "No initial notifications.");
runTestCycle(step0, "First rAF.", delay);
}, "IntersectionObserverV2 observing a position:relative div containing a position:relative child");
function step0() {
assert_equals(entries.length, 1, "First notification.");
assert_true(entries[0].isVisible, "Target is visible.");
}
</script>
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