third_party/WebKit/LayoutTests/intersection-observer/edge-inclusive-intersection.html - Issue 2645283008: IntersectionObserver: Always send an initial notification.

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Issue 2645283008: IntersectionObserver: Always send an initial notification. (Closed)

Patch Set: Created 3 years, 10 months ago

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1 <!DOCTYPE html>	1 <!DOCTYPE html>

2 <script src="../resources/testharness.js"></script>	2 <script src="../resources/testharness.js"></script>

3 <script src="../resources/testharnessreport.js"></script>	3 <script src="../resources/testharnessreport.js"></script>

4 <script src="./resources/intersection-observer-test-utils.js"></script>	4 <script src="./resources/intersection-observer-test-utils.js"></script>

5	5

6 <style>	6 <style>

7 pre, #log {	7 pre, #log {

8 position: absolute;	8 position: absolute;

9 top: 0;	9 top: 0;

10 left: 200px;	10 left: 200px;

(...skipping 22 matching lines...) Expand all Loading...
33 var root = document.getElementById('root');	33 var root = document.getElementById('root');

34 assert_true(!!root, "root element exists.");	34 assert_true(!!root, "root element exists.");

35 var target = document.getElementById('target');	35 var target = document.getElementById('target');

36 assert_true(!!target, "target element exists.");	36 assert_true(!!target, "target element exists.");

37 var observer = new IntersectionObserver(function(changes) {	37 var observer = new IntersectionObserver(function(changes) {

38 entries = entries.concat(changes);	38 entries = entries.concat(changes);

39 }, { root: root });	39 }, { root: root });

40 observer.observe(target);	40 observer.observe(target);

41 entries = entries.concat(observer.takeRecords());	41 entries = entries.concat(observer.takeRecords());

42 assert_equals(entries.length, 0, "No initial notifications.");	42 assert_equals(entries.length, 0, "No initial notifications.");

43 runTestCycle(step0, "No notifications after first rAF.");	43 runTestCycle(step0, "First rAF.");

44 }, "IntersectionObserver should detect and report edge-adjacent and zero-area in tersections.");	44 }, "IntersectionObserver should detect and report edge-adjacent and zero-area in tersections.");

45	45

46 function step0() {	46 function step0() {

47 runTestCycle(step1, "Set transform=translateY(200px) on target.");	47 runTestCycle(step1, "Set transform=translateY(200px) on target.");

48 assert_equals(entries.length, 0, "entries.length");	48 checkLastEntry(entries, 0, [8, 108, 258, 358, 0, 0, 0, 0, 8, 208, 8, 208, targ et]);

49 target.style.transform = "translateY(200px)";	49 target.style.transform = "translateY(200px)";

50 }	50 }

51	51

52 function step1() {	52 function step1() {

53 runTestCycle(step2, "Set transform=translateY(201px) on target.");	53 runTestCycle(step2, "Set transform=translateY(201px) on target.");

54 checkLastEntry(entries, 0, [8, 108, 208, 308, 8, 108, 208, 208, 8, 208, 8, 208 , target]);	54 checkLastEntry(entries, 1, [8, 108, 208, 308, 8, 108, 208, 208, 8, 208, 8, 208 , target]);

55 target.style.transform = "translateY(201px)";	55 target.style.transform = "translateY(201px)";

56 }	56 }

57	57

58 function step2() {	58 function step2() {

59 runTestCycle(step3, "Set transform=translateY(185px) on target.");	59 runTestCycle(step3, "Set transform=translateY(185px) on target.");

60 checkLastEntry(entries, 1);	60 checkLastEntry(entries, 2);

61 target.style.height = "0px";	61 target.style.height = "0px";

62 target.style.width = "300px";	62 target.style.width = "300px";

63 target.style.transform = "translateY(185px)";	63 target.style.transform = "translateY(185px)";

64 }	64 }

65	65

66 function step3() {	66 function step3() {

67 checkLastEntry(entries, 2, [8, 308, 193, 193, 8, 208, 193, 193, 8, 208, 8, 208 , target]);	67 checkLastEntry(entries, 3, [8, 308, 193, 193, 8, 208, 193, 193, 8, 208, 8, 208 , target]);

68 }	68 }

69 </script>	69 </script>

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