| Nolan Lawson | f40b9f3 | 2018-05-17 20:47:35 | [diff] [blame] | 1 | <!DOCTYPE html> |
| Hiroyuki Ikezoe | 9ddcc73 | 2019-05-18 23:45:29 | [diff] [blame] | 2 | <meta name="viewport" content="width=device-width,initial-scale=1"> |
| Nolan Lawson | f40b9f3 | 2018-05-17 20:47:35 | [diff] [blame] | 3 | <script src="/resources/testharness.js"></script> |
| 4 | <script src="/resources/testharnessreport.js"></script> |
| 5 | <script src="./resources/intersection-observer-test-utils.js"></script> |
| 6 | |
| 7 | <style> |
| 8 | pre, #log { |
| 9 | position: absolute; |
| 10 | top: 0; |
| 11 | left: 200px; |
| 12 | } |
| 13 | #root { |
| 14 | position: absolute; |
| 15 | top: 0; |
| 16 | left: 0; |
| 17 | width: 150px; |
| 18 | height: 200px; |
| 19 | overflow-y: scroll; |
| 20 | } |
| 21 | #target1, #target2, #target3, #target4 { |
| 22 | width: 100px; |
| 23 | height: 100px; |
| 24 | } |
| 25 | #target1 { |
| 26 | background-color: green; |
| 27 | } |
| 28 | #target2 { |
| 29 | background-color: red; |
| 30 | } |
| 31 | #target3 { |
| 32 | background-color: blue; |
| 33 | } |
| 34 | #target4 { |
| 35 | background-color: yellow; |
| 36 | } |
| 37 | </style> |
| 38 | |
| 39 | <div id="root"> |
| 40 | <div id="target1"></div> |
| 41 | <div id="target2"></div> |
| 42 | <div id="target3"></div> |
| 43 | </div> |
| 44 | |
| 45 | <script> |
| 46 | var entries = []; |
| 47 | var observer; |
| 48 | |
| 49 | runTestCycle(function() { |
| 50 | var root = document.getElementById('root'); |
| 51 | var target1 = document.getElementById('target1'); |
| 52 | var target2 = document.getElementById('target2'); |
| 53 | var target3 = document.getElementById('target3'); |
| 54 | assert_true(!!root, "root element exists."); |
| 55 | assert_true(!!target1, "target1 element exists."); |
| 56 | assert_true(!!target2, "target2 element exists."); |
| 57 | assert_true(!!target3, "target3 element exists."); |
| 58 | observer = new IntersectionObserver(function(changes) { |
| 59 | entries = entries.concat(changes); |
| 60 | }, { root: root }); |
| 61 | observer.observe(target1); |
| 62 | observer.observe(target2); |
| 63 | observer.observe(target3); |
| 64 | entries = entries.concat(observer.takeRecords()); |
| 65 | assert_equals(entries.length, 0, "No initial notifications."); |
| 66 | runTestCycle(step0, "Rects in initial notifications should report initial positions."); |
| 67 | }, "isIntersecting changes should trigger notifications."); |
| 68 | |
| 69 | function step0() { |
| 70 | assert_equals(entries.length, 3, "Has 3 initial notifications."); |
| 71 | checkRect(entries[0].boundingClientRect, [0, 100, 0, 100], "Check 1st entry rect"); |
| 72 | assert_equals(entries[0].target.id, 'target1', "Check 1st entry target id."); |
| 73 | checkIsIntersecting(entries, 0, true); |
| 74 | checkRect(entries[1].boundingClientRect, [0, 100, 100, 200], "Check 2nd entry rect"); |
| 75 | assert_equals(entries[1].target.id, 'target2', "Check 2nd entry target id."); |
| 76 | checkIsIntersecting(entries, 1, true); |
| 77 | checkRect(entries[2].boundingClientRect, [0, 100, 200, 300], "Check 3rd entry rect"); |
| 78 | assert_equals(entries[2].target.id, 'target3', "Check 3rd entry target id."); |
| 79 | checkIsIntersecting(entries, 2, true); |
| 80 | runTestCycle(step1, "Set scrollTop=100 and check for no new notifications."); |
| 81 | root.scrollTop = 100; |
| 82 | } |
| 83 | |
| 84 | function step1() { |
| 85 | assert_equals(entries.length, 3, "Has 3 total notifications because isIntersecting did not change."); |
| 86 | runTestCycle(step2, "Add 4th target."); |
| 87 | root.scrollTop = 0; |
| 88 | var target4 = document.createElement('div'); |
| 89 | target4.setAttribute('id', 'target4'); |
| 90 | root.appendChild(target4); |
| 91 | observer.observe(target4); |
| 92 | } |
| 93 | |
| 94 | function step2() { |
| Guido Bouman | ddd4602 | 2019-10-26 18:29:11 | [diff] [blame] | 95 | assert_equals(entries.length, 4, "Has 4 total notifications because 4th element was added."); |
| Nolan Lawson | f40b9f3 | 2018-05-17 20:47:35 | [diff] [blame] | 96 | checkRect(entries[3].boundingClientRect, [0, 100, 300, 400], "Check 4th entry rect"); |
| 97 | assert_equals(entries[3].target.id, 'target4', "Check 4th entry target id."); |
| 98 | checkIsIntersecting(entries, 3, false); |
| 99 | assert_equals(entries[3].intersectionRatio, 0, 'target4 initially has intersectionRatio of 0.'); |
| 100 | runTestCycle(step3, "Set scrollTop=100 and check for one new notification."); |
| 101 | root.scrollTop = 100; |
| 102 | } |
| 103 | |
| 104 | function step3() { |
| 105 | assert_equals(entries.length, 5, "Has 5 total notifications."); |
| 106 | checkRect(entries[4].boundingClientRect, [0, 100, 200, 300], "Check 5th entry rect"); |
| 107 | assert_equals(entries[4].target.id, 'target4', "Check 5th entry target id."); |
| 108 | checkIsIntersecting(entries, 4, true); |
| 109 | assert_equals(entries[4].intersectionRatio, 0, 'target4 still has intersectionRatio of 0.'); |
| 110 | root.scrollTop = 0; // reset to make it easier to refresh and run the test |
| 111 | } |
| 112 | |
| 113 | </script> |
