| <!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> |
| |
