| Xiaoming Shi | 73dfa20 | 2020-03-12 11:31:35 -0700 | [diff] [blame] | 1 | <!DOCTYPE html> |
| 2 | <script src="/resources/testharness.js"></script> |
| 3 | <script src="/resources/testharnessreport.js"></script> |
| 4 | <script src="./resources/intersection-observer-test-utils.js"></script> |
| 5 | |
| 6 | <style> |
| 7 | pre, #log { |
| 8 | position: absolute; |
| 9 | top: 0; |
| 10 | left: 200px; |
| 11 | } |
| 12 | .spacer { |
| 13 | height: calc(100vh + 100px); |
| 14 | } |
| 15 | #root { |
| 16 | display: inline-block; |
| 17 | overflow-y: scroll; |
| 18 | height: 200px; |
| 19 | border: 3px solid black; |
| 20 | } |
| 21 | #target { |
| 22 | width: 100px; |
| 23 | height: 100px; |
| 24 | background-color: green; |
| 25 | } |
| 26 | </style> |
| 27 | |
| 28 | <div class="spacer"></div> |
| 29 | <div id="root"> |
| 30 | <div style="height: 300px;"></div> |
| 31 | <div id="target"></div> |
| 32 | </div> |
| 33 | <div class="spacer"></div> |
| 34 | |
| 35 | <script> |
| 36 | var vw = document.documentElement.clientWidth; |
| 37 | var vh = document.documentElement.clientHeight; |
| 38 | |
| 39 | var entries = []; |
| 40 | var root, target; |
| 41 | |
| 42 | runTestCycle(function() { |
| 43 | target = document.getElementById("target"); |
| 44 | assert_true(!!target, "target exists"); |
| 45 | root = document.getElementById("root"); |
| 46 | assert_true(!!root, "root exists"); |
| 47 | var observer = new IntersectionObserver(function(changes) { |
| 48 | entries = entries.concat(changes) |
| 49 | }, { root: root, rootMargin: "10px 20% 40% 30px" }); |
| 50 | observer.observe(target); |
| 51 | entries = entries.concat(observer.takeRecords()); |
| 52 | assert_equals(entries.length, 0, "No initial notifications."); |
| 53 | runTestCycle(step0, "First rAF"); |
| 54 | }, "Root margin with explicit root."); |
| 55 | |
| 56 | function step0() { |
| 57 | document.scrollingElement.scrollTop = vh; |
| 58 | runTestCycle(step1, "document.scrollingElement.scrollTop = window.innerHeight."); |
| 59 | checkLastEntry(entries, 0, [ 11, 111, vh + 411, vh + 511, 0, 0, 0, 0, -19, 131, vh + 101, vh + 391, false]); |
| 60 | } |
| 61 | |
| 62 | function step1() { |
| 63 | root.scrollTop = 50; |
| 64 | runTestCycle(step2, "root.scrollTop = 50, putting target into root margin"); |
| 65 | assert_equals(entries.length, 1, "No notifications after scrolling frame."); |
| 66 | } |
| 67 | |
| 68 | function step2() { |
| 69 | document.scrollingElement.scrollTop = 0; |
| 70 | runTestCycle(step3, "document.scrollingElement.scrollTop = 0."); |
| 71 | checkLastEntry(entries, 1, [11, 111, 361, 461, 11, 111, 361, 391, -19, 131, 101, 391, true]); |
| 72 | } |
| 73 | |
| 74 | function step3() { |
| 75 | root.scrollTop = 0; |
| 76 | runTestCycle(step4, "root.scrollTop = 0"); |
| 77 | checkLastEntry(entries, 1); |
| 78 | } |
| 79 | |
| 80 | function step4() { |
| 81 | root.scrollTop = 50; |
| 82 | runTestCycle(step5, "root.scrollTop = 50 with root scrolled out of view."); |
| 83 | checkLastEntry(entries, 2, [ 11, 111, vh + 411, vh + 511, 0, 0, 0, 0, -19, 131, vh + 101, vh + 391, false]); |
| 84 | } |
| 85 | |
| 86 | // This tests that notifications are generated even when the root element is off screen. |
| 87 | function step5() { |
| 88 | checkLastEntry(entries, 3, [11, 111, vh + 361, vh + 461, 11, 111, vh + 361, vh + 391, -19, 131, vh + 101, vh + 391, true]); |
| 89 | } |
| 90 | </script> |
