| Xiaoming Shi | 73dfa20 | 2020-03-12 11:31:35 -0700 | [diff] [blame] | 1 | <!DOCTYPE html> |
| 2 | <meta name="viewport" content="width=device-width,initial-scale=1"> |
| 3 | <script src="/resources/testharness.js"></script> |
| 4 | <script src="/resources/testharnessreport.js"></script> |
| 5 | <script src="../resources/intersection-observer-test-utils.js"></script> |
| 6 | |
| 7 | <style> |
| 8 | body, html { |
| 9 | margin: 0; |
| 10 | } |
| 11 | pre, #log { |
| 12 | position: absolute; |
| 13 | top: 0; |
| 14 | left: 200px; |
| 15 | } |
| 16 | .relpos { |
| 17 | position: relative; |
| 18 | } |
| 19 | </style> |
| 20 | |
| 21 | <div id="target" class="relpos"> |
| 22 | <div class="relpos"> |
| 23 | <img border="0" width="100" height="100" src=""/> |
| 24 | </div> |
| 25 | </div> |
| 26 | |
| 27 | <script> |
| 28 | var delay = 100; |
| 29 | var entries = []; |
| 30 | var target; |
| 31 | |
| 32 | runTestCycle(function() { |
| 33 | target = document.getElementById("target"); |
| 34 | assert_true(!!target, "target exists"); |
| 35 | var observer = new IntersectionObserver(function(changes) { |
| 36 | entries = entries.concat(changes) |
| 37 | }, {trackVisibility: true, delay: delay}); |
| 38 | observer.observe(target); |
| 39 | entries = entries.concat(observer.takeRecords()); |
| 40 | assert_equals(entries.length, 0, "No initial notifications."); |
| 41 | runTestCycle(step0, "First rAF.", delay); |
| 42 | }, "IntersectionObserverV2 observing a position:relative div containing a position:relative child"); |
| 43 | |
| 44 | function step0() { |
| 45 | assert_equals(entries.length, 1, "First notification."); |
| 46 | assert_true(entries[0].isVisible, "Target is visible."); |
| 47 | } |
| 48 | </script> |
| 49 | |
