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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="target" style="background-color: green; width:100px; height:100px"></di
v> |
| 6 <div style="width:100%; height:700px;"></div> |
| 7 |
| 8 <script> |
| 9 description("Simple intersection observer test with no explicit root and one d
ocument."); |
| 10 var target = document.getElementById("target"); |
| 11 var entries = []; |
| 12 |
| 13 observer_callback = function(changes) { |
| 14 for (var i in changes) |
| 15 entries.push(changes[i]); |
| 16 }; |
| 17 var observer = new IntersectionObserver(observer_callback, {}); |
| 18 observer.observe(target); |
| 19 |
| 20 // TODO(szager): It shouldn't be necessary to RAF after the call to observer() |
| 21 // and before changing the scroll position, but it is. |
| 22 |
| 23 function step0() { |
| 24 setTimeout(function() { |
| 25 shouldBeEqualToNumber("entries.length", 0); |
| 26 document.scrollingElement.scrollTop = 300; |
| 27 requestAnimationFrame(step1); |
| 28 }); |
| 29 } |
| 30 |
| 31 function step1() { |
| 32 setTimeout(function() { |
| 33 shouldBeEqualToNumber("entries.length", 1); |
| 34 shouldBeEqualToNumber("entries[0].boundingClientRect.left", 8); |
| 35 shouldBeEqualToNumber("entries[0].boundingClientRect.right", 108); |
| 36 shouldBeEqualToNumber("entries[0].boundingClientRect.top", 408); |
| 37 shouldBeEqualToNumber("entries[0].boundingClientRect.bottom", 508); |
| 38 shouldBeEqualToNumber("entries[0].intersectionRect.left", 8); |
| 39 shouldBeEqualToNumber("entries[0].intersectionRect.right", 108); |
| 40 shouldBeEqualToNumber("entries[0].intersectionRect.top", 408); |
| 41 shouldBeEqualToNumber("entries[0].intersectionRect.bottom", 508); |
| 42 shouldBeEqualToNumber("entries[0].rootBounds.left", 0); |
| 43 shouldBeEqualToNumber("entries[0].rootBounds.right", 785); |
| 44 shouldBeEqualToNumber("entries[0].rootBounds.top", 0); |
| 45 shouldBeEqualToNumber("entries[0].rootBounds.bottom", 600); |
| 46 shouldEvaluateToSameObject("entries[0].target", target); |
| 47 |
| 48 // ClientRect members of IntersectionObserverEntry should be stable. |
| 49 shouldEvaluateToSameObject("entries[0].boundingClientRect", entries[0].bou
ndingClientRect); |
| 50 shouldEvaluateToSameObject("entries[0].intersectionRect", entries[0].inter
sectionRect); |
| 51 shouldEvaluateToSameObject("entries[0].rootBounds", entries[0].rootBounds)
; |
| 52 |
| 53 document.scrollingElement.scrollTop = 100; |
| 54 requestAnimationFrame(step2); |
| 55 }); |
| 56 } |
| 57 |
| 58 function step2() { |
| 59 setTimeout(function() { |
| 60 shouldBeEqualToNumber("entries.length", 2); |
| 61 shouldBeEqualToNumber("entries[1].boundingClientRect.left", 8); |
| 62 shouldBeEqualToNumber("entries[1].boundingClientRect.right", 108); |
| 63 shouldBeEqualToNumber("entries[1].boundingClientRect.top", 608); |
| 64 shouldBeEqualToNumber("entries[1].boundingClientRect.bottom", 708); |
| 65 shouldBeEqualToNumber("entries[1].intersectionRect.left", 0); |
| 66 shouldBeEqualToNumber("entries[1].intersectionRect.right", 0); |
| 67 shouldBeEqualToNumber("entries[1].intersectionRect.top", 0); |
| 68 shouldBeEqualToNumber("entries[1].intersectionRect.bottom", 0); |
| 69 shouldBeEqualToNumber("entries[1].rootBounds.left", 0); |
| 70 shouldBeEqualToNumber("entries[1].rootBounds.right", 785); |
| 71 shouldBeEqualToNumber("entries[1].rootBounds.top", 0); |
| 72 shouldBeEqualToNumber("entries[1].rootBounds.bottom", 600); |
| 73 shouldEvaluateToSameObject("entries[1].target", target); |
| 74 finishTest(); |
| 75 document.scrollingElement.scrollTop = 0; |
| 76 }); |
| 77 } |
| 78 |
| 79 requestAnimationFrame(step0); |
| 80 </script> |
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