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| 1 <!DOCTYPE html> |
| 2 <script src="../resources/js-test.js"></script> |
| 3 <script src="helper-functions.js"></script> |
| 4 <div style="width:100%; height:700px;"></div> |
| 5 <div id="root" style="display: inline-block; overflow-y: scroll; height: 200px;"
> |
| 6 <div id="target" style="width:100px; height:300px"></div> |
| 7 <iframe id="target-iframe" src="../resources/intersection-observer-subframe.ht
ml" style="width: 300px; height: 100px; overflow-y: scroll"></iframe> |
| 8 </div> |
| 9 <div style="width:100%; height:700px;"></div> |
| 10 |
| 11 <script> |
| 12 description("Simple intersection observer test with no explicit root and target
in an iframe."); |
| 13 var entries = []; |
| 14 var root = document.getElementById("root"); |
| 15 var targetIframe = document.getElementById("target-iframe"); |
| 16 |
| 17 targetIframe.onload = function() { |
| 18 var target = targetIframe.contentDocument.getElementById("target"); |
| 19 var iframeScroller = targetIframe.contentDocument.scrollingElement; |
| 20 |
| 21 observer_callback = function(changes) { |
| 22 for (var i in changes) |
| 23 entries.push(changes[i]); |
| 24 }; |
| 25 var observer = new IntersectionObserver(observer_callback, {"root": document.g
etElementById("root")}); |
| 26 observer.observe(target); |
| 27 |
| 28 // TODO(szager): It shouldn't be necessary to RAF after the call to observer() |
| 29 // and before changing the scroll position, but it is. |
| 30 |
| 31 function step0() { |
| 32 setTimeout(function() { |
| 33 shouldBeEqualToNumber("entries.length", 0); |
| 34 document.scrollingElement.scrollTop = 250; |
| 35 requestAnimationFrame(step1); |
| 36 }); |
| 37 } |
| 38 |
| 39 function step1() { |
| 40 setTimeout(function() { |
| 41 shouldBeEqualToNumber("entries.length", 0); |
| 42 iframeScroller.scrollTop = 200; |
| 43 requestAnimationFrame(step2); |
| 44 }); |
| 45 } |
| 46 |
| 47 function step2() { |
| 48 setTimeout(function() { |
| 49 shouldBeEqualToNumber("entries.length", 0); |
| 50 root.scrollTop = 175; |
| 51 requestAnimationFrame(step3); |
| 52 }); |
| 53 } |
| 54 |
| 55 function step3() { |
| 56 setTimeout(function() { |
| 57 shouldBeEqualToNumber("entries.length", 1); |
| 58 shouldBeEqualToNumber("entries[0].boundingClientRect.left", 18); |
| 59 shouldBeEqualToNumber("entries[0].boundingClientRect.right", 118); |
| 60 shouldBeEqualToNumber("entries[0].boundingClientRect.top", 593); |
| 61 shouldBeEqualToNumber("entries[0].boundingClientRect.bottom", 693); |
| 62 shouldBeEqualToNumber("entries[0].intersectionRect.left", 18); |
| 63 shouldBeEqualToNumber("entries[0].intersectionRect.right", 118); |
| 64 shouldBeEqualToNumber("entries[0].intersectionRect.top", 593); |
| 65 shouldBeEqualToNumber("entries[0].intersectionRect.bottom", 658); |
| 66 shouldBeEqualToNumber("entries[0].rootBounds.left", 8); |
| 67 shouldBeEqualToNumber("entries[0].rootBounds.right", 312); |
| 68 shouldBeEqualToNumber("entries[0].rootBounds.top", 458); |
| 69 shouldBeEqualToNumber("entries[0].rootBounds.bottom", 658); |
| 70 shouldEvaluateToSameObject("entries[0].target", target); |
| 71 document.scrollingElement.scrollTop = 100; |
| 72 requestAnimationFrame(step4); |
| 73 }); |
| 74 } |
| 75 |
| 76 function step4() { |
| 77 setTimeout(function() { |
| 78 shouldBeEqualToNumber("entries.length", 1); |
| 79 root.scrollTop = 100; |
| 80 requestAnimationFrame(step5); |
| 81 }); |
| 82 } |
| 83 |
| 84 function step5() { |
| 85 setTimeout(function() { |
| 86 shouldBeEqualToNumber("entries.length", 2); |
| 87 shouldBeEqualToNumber("entries[1].boundingClientRect.left", 18); |
| 88 shouldBeEqualToNumber("entries[1].boundingClientRect.right", 118); |
| 89 shouldBeEqualToNumber("entries[1].boundingClientRect.top", 818); |
| 90 shouldBeEqualToNumber("entries[1].boundingClientRect.bottom", 918); |
| 91 shouldBeEqualToNumber("entries[1].intersectionRect.left", 0); |
| 92 shouldBeEqualToNumber("entries[1].intersectionRect.right", 0); |
| 93 shouldBeEqualToNumber("entries[1].intersectionRect.top", 0); |
| 94 shouldBeEqualToNumber("entries[1].intersectionRect.bottom", 0); |
| 95 shouldBeEqualToNumber("entries[1].rootBounds.left", 8); |
| 96 shouldBeEqualToNumber("entries[1].rootBounds.right", 312); |
| 97 shouldBeEqualToNumber("entries[1].rootBounds.top", 608); |
| 98 shouldBeEqualToNumber("entries[1].rootBounds.bottom", 808); |
| 99 shouldEvaluateToSameObject("entries[1].target", target); |
| 100 finishTest(); |
| 101 document.scrollingElement.scrollTop = 0; |
| 102 }); |
| 103 } |
| 104 |
| 105 requestAnimationFrame(step0); |
| 106 } |
| 107 </script> |
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