| Xiaoming Shi | 73dfa20 | 2020-03-12 11:31:35 -0700 | [diff] [blame^] | 1 | <!DOCTYPE html> |
| 2 | <script src="/resources/testharness.js"></script> |
| 3 | <script src="/resources/testharnessreport.js"></script> |
| 4 | <script src="../resources/intersection-observer-test-utils.js"></script> |
| 5 | |
| 6 | <style> |
| 7 | body, html { |
| 8 | margin: 0; |
| 9 | } |
| 10 | pre, #log { |
| 11 | position: absolute; |
| 12 | top: 0; |
| 13 | left: 200px; |
| 14 | } |
| 15 | .testdiv { |
| 16 | font-size: 24px; |
| 17 | } |
| 18 | </style> |
| 19 | |
| 20 | <div class="testdiv">This is the <span id="target">target</span>.</div> |
| 21 | <div class="testdiv" id="occluder">This is the occluder.</div> |
| 22 | |
| 23 | <script> |
| 24 | var delay = 100; |
| 25 | var entries = []; |
| 26 | var target; |
| 27 | var occluder; |
| 28 | |
| 29 | runTestCycle(function() { |
| 30 | target = document.getElementById("target"); |
| 31 | occluder = document.getElementById("occluder"); |
| 32 | assert_true(!!target, "target exists"); |
| 33 | assert_true(!!occluder, "occluder exists"); |
| 34 | var observer = new IntersectionObserver(function(changes) { |
| 35 | entries = entries.concat(changes) |
| 36 | }, {trackVisibility: true, delay: delay}); |
| 37 | observer.observe(target); |
| 38 | entries = entries.concat(observer.takeRecords()); |
| 39 | assert_equals(entries.length, 0, "No initial notifications."); |
| 40 | runTestCycle(step0, "First rAF.", delay); |
| 41 | }, "IntersectionObserverV2 in a single document using the implicit root, with an occluding element.", delay); |
| 42 | |
| 43 | function step0() { |
| 44 | occluder.style.marginTop = "-10px"; |
| 45 | runTestCycle(step1, "occluder.style.marginTop = '-10px'", delay); |
| 46 | assert_equals(entries.length, 1); |
| 47 | assert_true(entries[0].isVisible); |
| 48 | } |
| 49 | |
| 50 | function step1() { |
| 51 | // Occluding elements with opacity=0 should not affect target visibility. |
| 52 | occluder.style.opacity = "0"; |
| 53 | runTestCycle(step2, "occluder.style.opacity = 0", delay); |
| 54 | assert_equals(entries.length, 2); |
| 55 | assert_false(entries[1].isVisible); |
| 56 | } |
| 57 | |
| 58 | function step2() { |
| 59 | assert_equals(entries.length, 3); |
| 60 | assert_true(entries[2].isVisible); |
| 61 | } |
| 62 | </script> |
