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Issue 2149033003: IntersectionObserver: send notifications when objects disappear. (Closed) Base URL: https://chromium.googlesource.com/chromium/src@master
Patch Set: Created 4 years, 5 months ago
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1 <!DOCTYPE html> 1 <!DOCTYPE html>
2 <script src="../resources/js-test.js"></script> 2 <script src="../resources/js-test.js"></script>
3 <script src="../resources/intersection-observer-helper-functions.js"></script> 3 <script src="../resources/intersection-observer-helper-functions.js"></script>
4 <style>
5 #root {
6 display: inline-block;
7 overflow-y: scroll;
8 height: 200px;
9 border: 3px solid black;
10 }
11 #target {
12 background-color: green;
13 width: 100px;
14 height: 100px;
15 }
16 </style>
4 <div style="width:100%; height:700px;"></div> 17 <div style="width:100%; height:700px;"></div>
5 <div id="root" style="display: inline-block; overflow-y: scroll; height: 200px; border: 3px solid black"> 18 <div id="root">
6 <div style="width:100px; height: 300px;"></div> 19 <div style="width:100px; height: 300px;"></div>
7 <div id="target" style="background-color: green; width:100px; height:100px"></ div> 20 <div id="target"></div>
21 <div style="width:100%;height:700px;"></div>
8 </div> 22 </div>
9 <div style="width:100%;height:700px;"></div> 23 <div style="width:100%;height:700px;"></div>
10 24
11 <script> 25 <script>
12 description("Simple intersection observer test with explicit root and target in the same document."); 26 description("Test that setting display:none will send a not-intersecting notific ation.");
13 var target = document.getElementById("target"); 27 var target = document.getElementById("target");
14 var root = document.getElementById("root"); 28 var root = document.getElementById("root");
15 var entries = []; 29 var entries = [];
16 var observer = new IntersectionObserver( 30 var observer = new IntersectionObserver(
17 changes => { entries = entries.concat(changes) }, 31 changes => { entries = entries.concat(changes) },
18 { root: document.getElementById("root") } 32 { root: document.getElementById("root") }
19 ); 33 );
20 34
21 onload = function() { 35 onload = function() {
22 observer.observe(target); 36 observer.observe(target);
23 entries = entries.concat(observer.takeRecords()); 37 entries = entries.concat(observer.takeRecords());
24 shouldBeEqualToNumber("entries.length", 0); 38 shouldBeEqualToNumber("entries.length", 0);
25 waitForNotification(step0); 39 waitForNotification(step0);
26 } 40 }
27 41
28 // Test that notifications are not generated when the target is overflow clipped by the root.
29 function step0() { 42 function step0() {
30 shouldBeEqualToNumber("entries.length", 0); 43 shouldBeEqualToNumber("entries.length", 0);
31 document.scrollingElement.scrollTop = 600; 44 document.scrollingElement.scrollTop = 600;
32 waitForNotification(step1); 45 waitForNotification(step1);
33 } 46 }
34 47
35 function step1() { 48 function step1() {
36 shouldBeEqualToNumber("entries.length", 0); 49 shouldBeEqualToNumber("entries.length", 0);
37 root.scrollTop = 150; 50 root.scrollTop = 150;
38 waitForNotification(step2); 51 waitForNotification(step2);
39 } 52 }
40 53
41 function step2() { 54 function step2() {
42 shouldBeEqualToNumber("entries.length", 1); 55 shouldBeEqualToNumber("entries.length", 1);
43 if (entries.length > 0) { 56 if (entries.length > 0) {
44 shouldBeEqualToNumber("entries[0].boundingClientRect.left", 11); 57 shouldBeEqualToNumber("entries[0].boundingClientRect.left", 11);
45 shouldBeEqualToNumber("entries[0].boundingClientRect.right", 111); 58 shouldBeEqualToNumber("entries[0].boundingClientRect.right", 111);
46 shouldBeEqualToNumber("entries[0].boundingClientRect.top", 261); 59 shouldBeEqualToNumber("entries[0].boundingClientRect.top", 261);
47 shouldBeEqualToNumber("entries[0].boundingClientRect.bottom", 361); 60 shouldBeEqualToNumber("entries[0].boundingClientRect.bottom", 361);
48 shouldBeEqualToNumber("entries[0].intersectionRect.left", 11); 61 shouldBeEqualToNumber("entries[0].intersectionRect.left", 11);
49 shouldBeEqualToNumber("entries[0].intersectionRect.right", 111); 62 shouldBeEqualToNumber("entries[0].intersectionRect.right", 111);
50 shouldBeEqualToNumber("entries[0].intersectionRect.top", 261); 63 shouldBeEqualToNumber("entries[0].intersectionRect.top", 261);
51 shouldBeEqualToNumber("entries[0].intersectionRect.bottom", 311); 64 shouldBeEqualToNumber("entries[0].intersectionRect.bottom", 311);
52 shouldBeEqualToNumber("entries[0].rootBounds.left", 11); 65 shouldBeEqualToNumber("entries[0].rootBounds.left", 11);
53 shouldBeEqualToNumber("entries[0].rootBounds.right", 111); 66 shouldBeEqualToNumber("entries[0].rootBounds.right", 111);
54 shouldBeEqualToNumber("entries[0].rootBounds.top", 111); 67 shouldBeEqualToNumber("entries[0].rootBounds.top", 111);
55 shouldBeEqualToNumber("entries[0].rootBounds.bottom", 311); 68 shouldBeEqualToNumber("entries[0].rootBounds.bottom", 311);
56 shouldEvaluateToSameObject("entries[0].target", target); 69 shouldEvaluateToSameObject("entries[0].target", target);
57 } 70 }
58 document.scrollingElement.scrollTop = 0; 71 target.style.display = "none";
59 waitForNotification(step3); 72 waitForNotification(step3);
60 } 73 }
61 74
62 function step3() { 75 function step3() {
63 shouldBeEqualToNumber("entries.length", 1); 76 shouldBeEqualToNumber("entries.length", 2);
64 root.scrollTop = 0; 77 if (entries.length > 1) {
78 shouldBeEqualToNumber("entries[1].boundingClientRect.left", 0);
79 shouldBeEqualToNumber("entries[1].boundingClientRect.right", 0);
80 shouldBeEqualToNumber("entries[1].boundingClientRect.top", 0);
81 shouldBeEqualToNumber("entries[1].boundingClientRect.bottom", 0);
82 shouldBeEqualToNumber("entries[1].intersectionRect.left", 0);
83 shouldBeEqualToNumber("entries[1].intersectionRect.right", 0);
84 shouldBeEqualToNumber("entries[1].intersectionRect.top", 0);
85 shouldBeEqualToNumber("entries[1].intersectionRect.bottom", 0);
86 shouldBeEqualToNumber("entries[1].rootBounds.left", 0);
87 shouldBeEqualToNumber("entries[1].rootBounds.right", 0);
88 shouldBeEqualToNumber("entries[1].rootBounds.top", 0);
89 shouldBeEqualToNumber("entries[1].rootBounds.bottom", 0);
90 shouldEvaluateToSameObject("entries[1].target", target);
91 }
92 target.style.display = "";
65 waitForNotification(step4); 93 waitForNotification(step4);
66 } 94 }
67 95
68 function step4() { 96 function step4() {
69 shouldBeEqualToNumber("entries.length", 2);
70 if (entries.length > 1) {
71 shouldBeEqualToNumber("entries[1].boundingClientRect.left", 11);
72 shouldBeEqualToNumber("entries[1].boundingClientRect.right", 111);
73 shouldBeEqualToNumber("entries[1].boundingClientRect.top", 1011);
74 shouldBeEqualToNumber("entries[1].boundingClientRect.bottom", 1111);
75 shouldBeEqualToNumber("entries[1].intersectionRect.left", 0);
76 shouldBeEqualToNumber("entries[1].intersectionRect.right", 0);
77 shouldBeEqualToNumber("entries[1].intersectionRect.top", 0);
78 shouldBeEqualToNumber("entries[1].intersectionRect.bottom", 0);
79 shouldBeEqualToNumber("entries[1].rootBounds.left", 11);
80 shouldBeEqualToNumber("entries[1].rootBounds.right", 111);
81 shouldBeEqualToNumber("entries[1].rootBounds.top", 711);
82 shouldBeEqualToNumber("entries[1].rootBounds.bottom", 911);
83 shouldEvaluateToSameObject("entries[1].target", target);
84 }
85 root.scrollTop = 150;
86 waitForNotification(step5);
87 }
88
89 // This tests that notifications are generated even when the root element is off screen.
90 function step5() {
91 shouldBeEqualToNumber("entries.length", 3); 97 shouldBeEqualToNumber("entries.length", 3);
92 if (entries.length > 2) { 98 if (entries.length > 2) {
93 shouldBeEqualToNumber("entries[2].boundingClientRect.left", 11); 99 shouldBeEqualToNumber("entries[2].boundingClientRect.left", 11);
94 shouldBeEqualToNumber("entries[2].boundingClientRect.right", 111); 100 shouldBeEqualToNumber("entries[2].boundingClientRect.right", 111);
95 shouldBeEqualToNumber("entries[2].boundingClientRect.top", 861); 101 shouldBeEqualToNumber("entries[2].boundingClientRect.top", 261);
96 shouldBeEqualToNumber("entries[2].boundingClientRect.bottom", 961); 102 shouldBeEqualToNumber("entries[2].boundingClientRect.bottom", 361);
97 shouldBeEqualToNumber("entries[2].intersectionRect.left", 11); 103 shouldBeEqualToNumber("entries[2].intersectionRect.left", 11);
98 shouldBeEqualToNumber("entries[2].intersectionRect.right", 111); 104 shouldBeEqualToNumber("entries[2].intersectionRect.right", 111);
99 shouldBeEqualToNumber("entries[2].intersectionRect.top", 861); 105 shouldBeEqualToNumber("entries[2].intersectionRect.top", 261);
100 shouldBeEqualToNumber("entries[2].intersectionRect.bottom", 911); 106 shouldBeEqualToNumber("entries[2].intersectionRect.bottom", 311);
101 shouldBeEqualToNumber("entries[2].rootBounds.left", 11); 107 shouldBeEqualToNumber("entries[2].rootBounds.left", 11);
102 shouldBeEqualToNumber("entries[2].rootBounds.right", 111); 108 shouldBeEqualToNumber("entries[2].rootBounds.right", 111);
103 shouldBeEqualToNumber("entries[2].rootBounds.top", 711); 109 shouldBeEqualToNumber("entries[2].rootBounds.top", 111);
104 shouldBeEqualToNumber("entries[2].rootBounds.bottom", 911); 110 shouldBeEqualToNumber("entries[2].rootBounds.bottom", 311);
105 shouldEvaluateToSameObject("entries[2].target", target); 111 shouldEvaluateToSameObject("entries[2].target", target);
106 } 112 }
107 113
108 finishJSTest(); 114 finishJSTest();
109 } 115 }
110 </script> 116 </script>
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