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| 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 pre, #log { |
| 8 position: absolute; |
| 9 top: 0; |
| 10 left: 200px; |
| 11 } |
| 12 #root { |
| 13 overflow: visible; |
| 14 height: 200px; |
| 15 width: 160px; |
| 16 border: 7px solid black; |
| 17 } |
| 18 #target { |
| 19 width: 100px; |
| 20 height: 100px; |
| 21 background-color: green; |
| 22 } |
| 23 </style> |
| 24 |
| 25 <div id="root"> |
| 26 <div id="target" style="transform: translateY(300px)"></div> |
| 27 </div> |
| 28 |
| 29 <script> |
| 30 var entries = []; |
| 31 var target; |
| 32 |
| 33 runTestCycle(function() { |
| 34 target = document.getElementById("target"); |
| 35 assert_true(!!target, "target exists"); |
| 36 var root = document.getElementById("root"); |
| 37 assert_true(!!root, "root exists"); |
| 38 var observer = new IntersectionObserver(function(changes) { |
| 39 entries = entries.concat(changes) |
| 40 }, {root: root}); |
| 41 observer.observe(target); |
| 42 entries = entries.concat(observer.takeRecords()); |
| 43 assert_equals(entries.length, 0, "No initial notifications."); |
| 44 runTestCycle(step0, "First rAF."); |
| 45 }, "Test that border bounding box is used to calculate intersection with a non-s
crolling root."); |
| 46 |
| 47 function step0() { |
| 48 target.style.transform = "translateY(195px)"; |
| 49 runTestCycle(step1, "target.style.transform = 'translateY(195px)'"); |
| 50 checkLastEntry(entries, 0, [15, 115, 315, 415, 0, 0, 0, 0, 8, 182, 8, 222, fal
se]); |
| 51 } |
| 52 |
| 53 function step1() { |
| 54 target.style.transform = ""; |
| 55 checkLastEntry(entries, 1, [15, 115, 210, 310, 15, 115, 210, 222, 8, 182, 8, 2
22, true]); |
| 56 } |
| 57 </script> |
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