box-reflect.html | Explore in Territory

<!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;
}
#reflect {
  width: 100px;
  height: 100px;
  background-color: hotpink;
  -webkit-box-reflect: below 10px;
  margin: 10px 0;
}
</style>

<div id="reflect"></div>
<div id="target">Hello, world!</div>

<script>
var delay = 100;
var entries = [];
var target;
var supported = CSS.supports("-webkit-box-reflect", "below 10px");

runTestCycle(function() {
  target = document.getElementById("target");
  assert_true(!!target, "target exists");
  let 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 detects occlusion from -webkit-box-reflect (if supported).", delay);

function step0() {
  assert_equals(entries.length, 1, "Initial notification.");
  assert_equals(entries[0].isVisible, !supported, "Occluded if -webkit-box-reflect is supported.");
}
</script>
chromium/third_party/blink/web_tests/external/wpt/intersection-observer/v2/box-reflect.html
