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Issue 1806133002: IntersectionObserver: use an idle callback to send notifications. (Closed) Base URL: https://chromium.googlesource.com/chromium/src@master
Patch Set: rebase Created 4 years, 8 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="helper-functions.js"></script> 3 <script src="helper-functions.js"></script>
4 <div style="width:100%; height:700px;"></div> 4 <div style="width:100%; height:700px;"></div>
5 <div id="target" style="background-color: green; width:100px; height:100px"></di v> 5 <div id="target" style="background-color: green; width:100px; height:100px"></di v>
6 <div style="width:100%; height:700px;"></div> 6 <div style="width:100%; height:700px;"></div>
7 7
8 <script> 8 <script>
9 description("Intersection observer test with multiple thresholds."); 9 description("Intersection observer test with multiple thresholds.");
10 var target = document.getElementById("target"); 10 var target = document.getElementById("target");
11 var entries = []; 11 var entries = [];
12 12 var observer = new IntersectionObserver(
13 observer_callback = function(changes) { 13 changes => { entries = entries.concat(changes) },
14 for (var i in changes) 14 { threshold: [0, 0.25, 0.5, 0.75, 1] }
15 entries.push(changes[i]); 15 );
16 }; 16
17 var observer = new IntersectionObserver(observer_callback, { 17 onload = function() {
18 threshold: [0, 0.25, 0.5, 0.75, 1]
19 });
20 observer.observe(target); 18 observer.observe(target);
21 19 entries = entries.concat(observer.takeRecords());
22 function step0() { 20 shouldBeEqualToNumber("entries.length", 0);
23 setTimeout(function() { 21 // See README for explanation of double RAF.
24 shouldBeEqualToNumber("entries.length", 0); 22 requestAnimationFrame(() => { requestAnimationFrame(step0) });
25 document.scrollingElement.scrollTop = 120; 23 }
26 requestAnimationFrame(step1); 24
27 }); 25 function step0() {
28 } 26 entries = entries.concat(observer.takeRecords());
29 27 shouldBeEqualToNumber("entries.length", 0);
30 function step1() { 28 document.scrollingElement.scrollTop = 120;
31 setTimeout(function() { 29 requestAnimationFrame(step1);
32 shouldBeEqualToNumber("entries.length", 1); 30 }
33 shouldBeEqualToNumber("entries[0].boundingClientRect.left", 8); 31
34 shouldBeEqualToNumber("entries[0].boundingClientRect.right", 108); 32 function step1() {
35 shouldBeEqualToNumber("entries[0].boundingClientRect.top", 588); 33 entries = entries.concat(observer.takeRecords());
36 shouldBeEqualToNumber("entries[0].boundingClientRect.bottom", 688); 34 shouldBeEqualToNumber("entries.length", 1);
37 shouldBeEqualToNumber("entries[0].intersectionRect.left", 8); 35 if (entries.length > 0) {
38 shouldBeEqualToNumber("entries[0].intersectionRect.right", 108); 36 shouldBeEqualToNumber("entries[0].boundingClientRect.left", 8);
39 shouldBeEqualToNumber("entries[0].intersectionRect.top", 588); 37 shouldBeEqualToNumber("entries[0].boundingClientRect.right", 108);
40 shouldBeEqualToNumber("entries[0].intersectionRect.bottom", 600); 38 shouldBeEqualToNumber("entries[0].boundingClientRect.top", 588);
41 shouldBeEqualToNumber("entries[0].rootBounds.left", 0); 39 shouldBeEqualToNumber("entries[0].boundingClientRect.bottom", 688);
42 shouldBeEqualToNumber("entries[0].rootBounds.right", 785); 40 shouldBeEqualToNumber("entries[0].intersectionRect.left", 8);
43 shouldBeEqualToNumber("entries[0].rootBounds.top", 0); 41 shouldBeEqualToNumber("entries[0].intersectionRect.right", 108);
44 shouldBeEqualToNumber("entries[0].rootBounds.bottom", 600); 42 shouldBeEqualToNumber("entries[0].intersectionRect.top", 588);
45 shouldEvaluateToSameObject("entries[0].target", target); 43 shouldBeEqualToNumber("entries[0].intersectionRect.bottom", 600);
46 document.scrollingElement.scrollTop = 160; 44 shouldBeEqualToNumber("entries[0].rootBounds.left", 0);
47 requestAnimationFrame(step2); 45 shouldBeEqualToNumber("entries[0].rootBounds.right", 785);
48 }); 46 shouldBeEqualToNumber("entries[0].rootBounds.top", 0);
49 } 47 shouldBeEqualToNumber("entries[0].rootBounds.bottom", 600);
50 48 shouldEvaluateToSameObject("entries[0].target", target);
51 function step2() { 49 }
52 setTimeout(function() { 50 document.scrollingElement.scrollTop = 160;
53 shouldBeEqualToNumber("entries.length", 2); 51 requestAnimationFrame(step2);
54 shouldBeEqualToNumber("entries[1].boundingClientRect.left", 8); 52 }
55 shouldBeEqualToNumber("entries[1].boundingClientRect.right", 108); 53
56 shouldBeEqualToNumber("entries[1].boundingClientRect.top", 548); 54 function step2() {
57 shouldBeEqualToNumber("entries[1].boundingClientRect.bottom", 648); 55 entries = entries.concat(observer.takeRecords());
58 shouldBeEqualToNumber("entries[1].intersectionRect.left", 8); 56 shouldBeEqualToNumber("entries.length", 2);
59 shouldBeEqualToNumber("entries[1].intersectionRect.right", 108); 57 if (entries.length > 1) {
60 shouldBeEqualToNumber("entries[1].intersectionRect.top", 548); 58 shouldBeEqualToNumber("entries[1].boundingClientRect.left", 8);
61 shouldBeEqualToNumber("entries[1].intersectionRect.bottom", 600); 59 shouldBeEqualToNumber("entries[1].boundingClientRect.right", 108);
62 shouldBeEqualToNumber("entries[1].rootBounds.left", 0); 60 shouldBeEqualToNumber("entries[1].boundingClientRect.top", 548);
63 shouldBeEqualToNumber("entries[1].rootBounds.right", 785); 61 shouldBeEqualToNumber("entries[1].boundingClientRect.bottom", 648);
64 shouldBeEqualToNumber("entries[1].rootBounds.top", 0); 62 shouldBeEqualToNumber("entries[1].intersectionRect.left", 8);
65 shouldBeEqualToNumber("entries[1].rootBounds.bottom", 600); 63 shouldBeEqualToNumber("entries[1].intersectionRect.right", 108);
66 shouldEvaluateToSameObject("entries[1].target", target); 64 shouldBeEqualToNumber("entries[1].intersectionRect.top", 548);
67 document.scrollingElement.scrollTop = 200; 65 shouldBeEqualToNumber("entries[1].intersectionRect.bottom", 600);
68 requestAnimationFrame(step3); 66 shouldBeEqualToNumber("entries[1].rootBounds.left", 0);
69 }); 67 shouldBeEqualToNumber("entries[1].rootBounds.right", 785);
70 } 68 shouldBeEqualToNumber("entries[1].rootBounds.top", 0);
71 69 shouldBeEqualToNumber("entries[1].rootBounds.bottom", 600);
72 function step3() { 70 shouldEvaluateToSameObject("entries[1].target", target);
73 setTimeout(function() { 71 }
74 shouldBeEqualToNumber("entries.length", 3); 72 document.scrollingElement.scrollTop = 200;
75 shouldBeEqualToNumber("entries[2].boundingClientRect.left", 8); 73 requestAnimationFrame(step3);
76 shouldBeEqualToNumber("entries[2].boundingClientRect.right", 108); 74 }
77 shouldBeEqualToNumber("entries[2].boundingClientRect.top", 508); 75
78 shouldBeEqualToNumber("entries[2].boundingClientRect.bottom", 608); 76 function step3() {
79 shouldBeEqualToNumber("entries[2].intersectionRect.left", 8); 77 entries = entries.concat(observer.takeRecords());
80 shouldBeEqualToNumber("entries[2].intersectionRect.right", 108); 78 shouldBeEqualToNumber("entries.length", 3);
81 shouldBeEqualToNumber("entries[2].intersectionRect.top", 508); 79 if (entries.length > 2) {
82 shouldBeEqualToNumber("entries[2].intersectionRect.bottom", 600); 80 shouldBeEqualToNumber("entries[2].boundingClientRect.left", 8);
83 shouldBeEqualToNumber("entries[2].rootBounds.left", 0); 81 shouldBeEqualToNumber("entries[2].boundingClientRect.right", 108);
84 shouldBeEqualToNumber("entries[2].rootBounds.right", 785); 82 shouldBeEqualToNumber("entries[2].boundingClientRect.top", 508);
85 shouldBeEqualToNumber("entries[2].rootBounds.top", 0); 83 shouldBeEqualToNumber("entries[2].boundingClientRect.bottom", 608);
86 shouldBeEqualToNumber("entries[2].rootBounds.bottom", 600); 84 shouldBeEqualToNumber("entries[2].intersectionRect.left", 8);
87 shouldEvaluateToSameObject("entries[2].target", target); 85 shouldBeEqualToNumber("entries[2].intersectionRect.right", 108);
88 document.scrollingElement.scrollTop = 240; 86 shouldBeEqualToNumber("entries[2].intersectionRect.top", 508);
89 requestAnimationFrame(step4); 87 shouldBeEqualToNumber("entries[2].intersectionRect.bottom", 600);
90 }); 88 shouldBeEqualToNumber("entries[2].rootBounds.left", 0);
91 } 89 shouldBeEqualToNumber("entries[2].rootBounds.right", 785);
92 90 shouldBeEqualToNumber("entries[2].rootBounds.top", 0);
93 function step4() { 91 shouldBeEqualToNumber("entries[2].rootBounds.bottom", 600);
94 setTimeout(function() { 92 shouldEvaluateToSameObject("entries[2].target", target);
95 shouldBeEqualToNumber("entries.length", 4); 93 }
96 shouldBeEqualToNumber("entries[3].boundingClientRect.left", 8); 94 document.scrollingElement.scrollTop = 240;
97 shouldBeEqualToNumber("entries[3].boundingClientRect.right", 108); 95 requestAnimationFrame(step4);
98 shouldBeEqualToNumber("entries[3].boundingClientRect.top", 468); 96 }
99 shouldBeEqualToNumber("entries[3].boundingClientRect.bottom", 568); 97
100 shouldBeEqualToNumber("entries[3].intersectionRect.left", 8); 98 function step4() {
101 shouldBeEqualToNumber("entries[3].intersectionRect.right", 108); 99 entries = entries.concat(observer.takeRecords());
102 shouldBeEqualToNumber("entries[3].intersectionRect.top", 468); 100 shouldBeEqualToNumber("entries.length", 4);
103 shouldBeEqualToNumber("entries[3].intersectionRect.bottom", 568); 101 if (entries.length > 3) {
104 shouldBeEqualToNumber("entries[3].rootBounds.left", 0); 102 shouldBeEqualToNumber("entries[3].boundingClientRect.left", 8);
105 shouldBeEqualToNumber("entries[3].rootBounds.right", 785); 103 shouldBeEqualToNumber("entries[3].boundingClientRect.right", 108);
106 shouldBeEqualToNumber("entries[3].rootBounds.top", 0); 104 shouldBeEqualToNumber("entries[3].boundingClientRect.top", 468);
107 shouldBeEqualToNumber("entries[3].rootBounds.bottom", 600); 105 shouldBeEqualToNumber("entries[3].boundingClientRect.bottom", 568);
108 shouldEvaluateToSameObject("entries[3].target", target); 106 shouldBeEqualToNumber("entries[3].intersectionRect.left", 8);
109 document.scrollingElement.scrollTop = 740; 107 shouldBeEqualToNumber("entries[3].intersectionRect.right", 108);
110 requestAnimationFrame(step5); 108 shouldBeEqualToNumber("entries[3].intersectionRect.top", 468);
111 }); 109 shouldBeEqualToNumber("entries[3].intersectionRect.bottom", 568);
112 } 110 shouldBeEqualToNumber("entries[3].rootBounds.left", 0);
113 111 shouldBeEqualToNumber("entries[3].rootBounds.right", 785);
114 function step5() { 112 shouldBeEqualToNumber("entries[3].rootBounds.top", 0);
115 setTimeout(function() { 113 shouldBeEqualToNumber("entries[3].rootBounds.bottom", 600);
116 shouldBeEqualToNumber("entries.length", 5); 114 shouldEvaluateToSameObject("entries[3].target", target);
117 shouldBeEqualToNumber("entries[4].boundingClientRect.left", 8); 115 }
118 shouldBeEqualToNumber("entries[4].boundingClientRect.right", 108); 116 document.scrollingElement.scrollTop = 740;
119 shouldBeEqualToNumber("entries[4].boundingClientRect.top", -32); 117 requestAnimationFrame(step5);
120 shouldBeEqualToNumber("entries[4].boundingClientRect.bottom", 68); 118 }
121 shouldBeEqualToNumber("entries[4].intersectionRect.left", 8); 119
122 shouldBeEqualToNumber("entries[4].intersectionRect.right", 108); 120 function step5() {
123 shouldBeEqualToNumber("entries[4].intersectionRect.top", 0); 121 entries = entries.concat(observer.takeRecords());
124 shouldBeEqualToNumber("entries[4].intersectionRect.bottom", 68); 122 shouldBeEqualToNumber("entries.length", 5);
125 shouldBeEqualToNumber("entries[4].rootBounds.left", 0); 123 if (entries.length > 4) {
126 shouldBeEqualToNumber("entries[4].rootBounds.right", 785); 124 shouldBeEqualToNumber("entries[4].boundingClientRect.left", 8);
127 shouldBeEqualToNumber("entries[4].rootBounds.top", 0); 125 shouldBeEqualToNumber("entries[4].boundingClientRect.right", 108);
128 shouldBeEqualToNumber("entries[4].rootBounds.bottom", 600); 126 shouldBeEqualToNumber("entries[4].boundingClientRect.top", -32);
129 shouldEvaluateToSameObject("entries[4].target", target); 127 shouldBeEqualToNumber("entries[4].boundingClientRect.bottom", 68);
130 document.scrollingElement.scrollTop = 760; 128 shouldBeEqualToNumber("entries[4].intersectionRect.left", 8);
131 requestAnimationFrame(step6); 129 shouldBeEqualToNumber("entries[4].intersectionRect.right", 108);
132 }); 130 shouldBeEqualToNumber("entries[4].intersectionRect.top", 0);
133 } 131 shouldBeEqualToNumber("entries[4].intersectionRect.bottom", 68);
134 132 shouldBeEqualToNumber("entries[4].rootBounds.left", 0);
135 function step6() { 133 shouldBeEqualToNumber("entries[4].rootBounds.right", 785);
136 setTimeout(function() { 134 shouldBeEqualToNumber("entries[4].rootBounds.top", 0);
137 shouldBeEqualToNumber("entries.length", 6); 135 shouldBeEqualToNumber("entries[4].rootBounds.bottom", 600);
138 shouldBeEqualToNumber("entries[5].boundingClientRect.left", 8); 136 shouldEvaluateToSameObject("entries[4].target", target);
139 shouldBeEqualToNumber("entries[5].boundingClientRect.right", 108); 137 }
140 shouldBeEqualToNumber("entries[5].boundingClientRect.top", -52); 138 document.scrollingElement.scrollTop = 760;
141 shouldBeEqualToNumber("entries[5].boundingClientRect.bottom", 48); 139 requestAnimationFrame(step6);
142 shouldBeEqualToNumber("entries[5].intersectionRect.left", 8); 140 }
143 shouldBeEqualToNumber("entries[5].intersectionRect.right", 108); 141
144 shouldBeEqualToNumber("entries[5].intersectionRect.top", 0); 142 function step6() {
145 shouldBeEqualToNumber("entries[5].intersectionRect.bottom", 48); 143 entries = entries.concat(observer.takeRecords());
146 shouldBeEqualToNumber("entries[5].rootBounds.left", 0); 144 shouldBeEqualToNumber("entries.length", 6);
147 shouldBeEqualToNumber("entries[5].rootBounds.right", 785); 145 if (entries.length > 5) {
148 shouldBeEqualToNumber("entries[5].rootBounds.top", 0); 146 shouldBeEqualToNumber("entries[5].boundingClientRect.left", 8);
149 shouldBeEqualToNumber("entries[5].rootBounds.bottom", 600); 147 shouldBeEqualToNumber("entries[5].boundingClientRect.right", 108);
150 shouldEvaluateToSameObject("entries[5].target", target); 148 shouldBeEqualToNumber("entries[5].boundingClientRect.top", -52);
151 document.scrollingElement.scrollTop = 800; 149 shouldBeEqualToNumber("entries[5].boundingClientRect.bottom", 48);
152 requestAnimationFrame(step7); 150 shouldBeEqualToNumber("entries[5].intersectionRect.left", 8);
153 }); 151 shouldBeEqualToNumber("entries[5].intersectionRect.right", 108);
154 } 152 shouldBeEqualToNumber("entries[5].intersectionRect.top", 0);
155 153 shouldBeEqualToNumber("entries[5].intersectionRect.bottom", 48);
156 function step7() { 154 shouldBeEqualToNumber("entries[5].rootBounds.left", 0);
157 setTimeout(function() { 155 shouldBeEqualToNumber("entries[5].rootBounds.right", 785);
158 shouldBeEqualToNumber("entries.length", 7); 156 shouldBeEqualToNumber("entries[5].rootBounds.top", 0);
159 shouldBeEqualToNumber("entries[6].boundingClientRect.left", 8); 157 shouldBeEqualToNumber("entries[5].rootBounds.bottom", 600);
160 shouldBeEqualToNumber("entries[6].boundingClientRect.right", 108); 158 shouldEvaluateToSameObject("entries[5].target", target);
161 shouldBeEqualToNumber("entries[6].boundingClientRect.top", -92); 159 }
162 shouldBeEqualToNumber("entries[6].boundingClientRect.bottom", 8); 160 document.scrollingElement.scrollTop = 800;
163 shouldBeEqualToNumber("entries[6].intersectionRect.left", 8); 161 requestAnimationFrame(step7);
164 shouldBeEqualToNumber("entries[6].intersectionRect.right", 108); 162 }
165 shouldBeEqualToNumber("entries[6].intersectionRect.top", 0); 163
166 shouldBeEqualToNumber("entries[6].intersectionRect.bottom", 8); 164 function step7() {
167 shouldBeEqualToNumber("entries[6].rootBounds.left", 0); 165 entries = entries.concat(observer.takeRecords());
168 shouldBeEqualToNumber("entries[6].rootBounds.right", 785); 166 shouldBeEqualToNumber("entries.length", 7);
169 shouldBeEqualToNumber("entries[6].rootBounds.top", 0); 167 if (entries.length > 6) {
170 shouldBeEqualToNumber("entries[6].rootBounds.bottom", 600); 168 shouldBeEqualToNumber("entries[6].boundingClientRect.left", 8);
171 shouldEvaluateToSameObject("entries[6].target", target); 169 shouldBeEqualToNumber("entries[6].boundingClientRect.right", 108);
172 document.scrollingElement.scrollTop = 820; 170 shouldBeEqualToNumber("entries[6].boundingClientRect.top", -92);
173 requestAnimationFrame(step8); 171 shouldBeEqualToNumber("entries[6].boundingClientRect.bottom", 8);
174 }); 172 shouldBeEqualToNumber("entries[6].intersectionRect.left", 8);
175 } 173 shouldBeEqualToNumber("entries[6].intersectionRect.right", 108);
176 174 shouldBeEqualToNumber("entries[6].intersectionRect.top", 0);
177 function step8() { 175 shouldBeEqualToNumber("entries[6].intersectionRect.bottom", 8);
178 setTimeout(function() { 176 shouldBeEqualToNumber("entries[6].rootBounds.left", 0);
179 shouldBeEqualToNumber("entries.length", 8); 177 shouldBeEqualToNumber("entries[6].rootBounds.right", 785);
180 shouldBeEqualToNumber("entries[7].boundingClientRect.left", 8); 178 shouldBeEqualToNumber("entries[6].rootBounds.top", 0);
181 shouldBeEqualToNumber("entries[7].boundingClientRect.right", 108); 179 shouldBeEqualToNumber("entries[6].rootBounds.bottom", 600);
182 shouldBeEqualToNumber("entries[7].boundingClientRect.top", -112); 180 shouldEvaluateToSameObject("entries[6].target", target);
183 shouldBeEqualToNumber("entries[7].boundingClientRect.bottom", -12); 181 }
184 shouldBeEqualToNumber("entries[7].intersectionRect.left", 0); 182 document.scrollingElement.scrollTop = 820;
185 shouldBeEqualToNumber("entries[7].intersectionRect.right", 0); 183 requestAnimationFrame(step8);
186 shouldBeEqualToNumber("entries[7].intersectionRect.top", 0); 184 }
187 shouldBeEqualToNumber("entries[7].intersectionRect.bottom", 0); 185
188 shouldBeEqualToNumber("entries[7].rootBounds.left", 0); 186 function step8() {
189 shouldBeEqualToNumber("entries[7].rootBounds.right", 785); 187 entries = entries.concat(observer.takeRecords());
190 shouldBeEqualToNumber("entries[7].rootBounds.top", 0); 188 shouldBeEqualToNumber("entries.length", 8);
191 shouldBeEqualToNumber("entries[7].rootBounds.bottom", 600); 189 if (entries.length > 7) {
192 shouldEvaluateToSameObject("entries[7].target", target); 190 shouldBeEqualToNumber("entries[7].boundingClientRect.left", 8);
193 finishJSTest(); 191 shouldBeEqualToNumber("entries[7].boundingClientRect.right", 108);
194 document.scrollingElement.scrollTop = 0; 192 shouldBeEqualToNumber("entries[7].boundingClientRect.top", -112);
195 }); 193 shouldBeEqualToNumber("entries[7].boundingClientRect.bottom", -12);
196 } 194 shouldBeEqualToNumber("entries[7].intersectionRect.left", 0);
197 195 shouldBeEqualToNumber("entries[7].intersectionRect.right", 0);
198 step0(); 196 shouldBeEqualToNumber("entries[7].intersectionRect.top", 0);
197 shouldBeEqualToNumber("entries[7].intersectionRect.bottom", 0);
198 shouldBeEqualToNumber("entries[7].rootBounds.left", 0);
199 shouldBeEqualToNumber("entries[7].rootBounds.right", 785);
200 shouldBeEqualToNumber("entries[7].rootBounds.top", 0);
201 shouldBeEqualToNumber("entries[7].rootBounds.bottom", 600);
202 shouldEvaluateToSameObject("entries[7].target", target);
203 }
204 finishJSTest();
205 document.scrollingElement.scrollTop = 0;
206 }
199 </script> 207 </script>
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