<!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; } #target { background-color: green; width: 100px; height: 100px; } </style> <div id="target"></div> <script> var vw = document.documentElement.clientWidth; var vh = document.documentElement.clientHeight; var entries = []; promise_test(async function(t) { var target = document.getElementById("target"); var root = document.getElementById("root"); 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."); await waitForNotification(); checkLastEntry( entries, 0, [8, 108, 8, 108, 8, 108, 8, 108, 0, vw, 0, vh, true], "IntersectionObserver notification after first rAF", ); target.style.display = "none"; await waitForNotification(); checkLastEntry( entries, 1, [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, false], "IntersectionObserver should send a not-intersecting notification for a target that gets display:none.", ); target.style.display = ""; await waitForNotification(); checkLastEntry( entries, 2, [8, 108, 8, 108, 8, 108, 8, 108, 0, vw, 0, vh, true], "Intersecting notification after removing display:none on target.", ); }); </script>