Import Cobalt 21.master.0.253153
diff --git a/src/third_party/web_platform_tests/intersection-observer/v2/position-relative.html b/src/third_party/web_platform_tests/intersection-observer/v2/position-relative.html
new file mode 100644
index 0000000..4cdc429
--- /dev/null
+++ b/src/third_party/web_platform_tests/intersection-observer/v2/position-relative.html
@@ -0,0 +1,49 @@
+<!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>
+
