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| (Empty) | |
| 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 .spacer { |
| 13 height: 700px; |
| 14 } |
| 15 #target { |
| 16 width: 100px; |
| 17 height: 100px; |
| 18 background-color: green; |
| 19 } |
| 20 </style> |
| 21 |
| 22 <div class="spacer"></div> |
| 23 <div id="target"></div> |
| 24 <div class="spacer"></div> |
| 25 |
| 26 <script> |
| 27 var entries = []; |
| 28 var observer; |
| 29 var target; |
| 30 |
| 31 runTestCycle(function() { |
| 32 assert_equals(window.innerWidth, 800, "Window must be 800 pixels wide."); |
| 33 assert_equals(window.innerHeight, 600, "Window must be 600 pixels high."); |
| 34 |
| 35 target = document.getElementById("target"); |
| 36 assert_true(!!target, "target exists"); |
| 37 observer = new IntersectionObserver(function(changes) { |
| 38 entries = entries.concat(changes) |
| 39 }); |
| 40 observer.observe(target); |
| 41 entries = entries.concat(observer.takeRecords()); |
| 42 assert_equals(entries.length, 0, "No initial notifications."); |
| 43 runTestCycle(step0, "First rAF."); |
| 44 }, "IntersectionObserver should not deliver pending notifications after disconne
ct()."); |
| 45 |
| 46 function step0() { |
| 47 runTestCycle(step1, "observer.disconnect()"); |
| 48 document.scrollingElement.scrollTop = 300; |
| 49 observer.disconnect(); |
| 50 assert_equals(entries.length, 1, "Initial notification."); |
| 51 } |
| 52 |
| 53 function step1() { |
| 54 assert_equals(entries.length, 1, "No new notifications."); |
| 55 } |
| 56 </script> |
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Chromium Code Reviews
Issue 2684733002:
IntersectionObserver: discard notifications upon disconnect(). (Closed)
