shadow-content.html

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This WPT test may be referenced by the following Test IDs:
- /intersection-observer/shadow-content.html - WPT Dashboard Interop Dashboard

<!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>