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| 1 | +<!DOCTYPE html> |
| 2 | +<title>IntersectionObserver observing table with border and overflow scroll</title> |
| 3 | +<link rel="author" href="mailto:steven.novaryo@gmail.com" title="Steven Novaryo"> |
| 4 | +<link rel="help" href="https://w3c.github.io/IntersectionObserver/#intersectionobserver-root-intersection-rectangle"> |
| 5 | +<link rel="help" href="https://drafts.csswg.org/css-tables/#global-style-overrides"> |
| 6 | +<script src="/resources/testharness.js"></script> |
| 7 | +<script src="/resources/testharnessreport.js"></script> |
| 8 | +<script src="./resources/intersection-observer-test-utils.js"></script> |
| 9 | + |
| 10 | +<style> |
| 11 | + #root { |
| 12 | + box-sizing: border-box; |
| 13 | + overflow: scroll; |
| 14 | + border: 50px solid black; |
| 15 | + will-change: transform; |
| 16 | + } |
| 17 | + #target { |
| 18 | + display: inline-block; |
| 19 | + width: 50px; |
| 20 | + height: 50px; |
| 21 | + position: absolute; |
| 22 | + top: 300px; |
| 23 | + left: 300px; |
| 24 | + background-color: green; |
| 25 | + } |
| 26 | +</style> |
| 27 | +<table id="root"> |
| 28 | + <tr> |
| 29 | + <td> |
| 30 | + <span id="target"></span> |
| 31 | + </td> |
| 32 | + </tr> |
| 33 | +</table> |
| 34 | +<script> |
| 35 | +var entries = []; |
| 36 | +var rootRect = root.getBoundingClientRect(); |
| 37 | + |
| 38 | +runTestCycle(function() { |
| 39 | + assert_true(!!target, "target exists"); |
| 40 | + var observer = new IntersectionObserver(function(changes) { |
| 41 | + entries = entries.concat(changes) |
| 42 | + }, { root: root }); |
| 43 | + observer.observe(target); |
| 44 | + entries = entries.concat(observer.takeRecords()); |
| 45 | + assert_equals(entries.length, 0, "No initial notifications."); |
| 46 | + runTestCycle(step0, "First rAF."); |
| 47 | +}, "IntersectionObserver observing an element inside a root table."); |
| 48 | + |
| 49 | +function step0() { |
| 50 | + // To reduce the inconsistencies of the layout within different UAs we are calculating the offset dynamically. |
| 51 | + var targetRect = target.getBoundingClientRect(); |
| 52 | + target.style.top = `${300 - (targetRect.top - rootRect.bottom + 50)}px`; |
| 53 | + target.style.left = `${300 - (targetRect.left - rootRect.right + 50)}px`; |
| 54 | + runTestCycle(step1, "Moving the target to the right bottom corner of the table."); |
| 55 | + checkLastEntry(entries, 0, [ |
| 56 | + targetRect.left, targetRect.right, targetRect.top, targetRect.bottom, |
| 57 | + 0, 0, 0, 0, |
| 58 | + rootRect.left, rootRect.right, rootRect.top, rootRect.bottom, |
| 59 | + false |
| 60 | + ]); |
| 61 | +} |
| 62 | + |
| 63 | +function step1() { |
| 64 | + var targetRect = target.getBoundingClientRect(); |
| 65 | + checkLastEntry(entries, 1, [ |
| 66 | + targetRect.left, targetRect.right, targetRect.top, targetRect.bottom, |
| 67 | + targetRect.left, targetRect.right, targetRect.top, targetRect.bottom, |
| 68 | + rootRect.left, rootRect.right, rootRect.top, rootRect.bottom, |
| 69 | + true |
| 70 | + ]); |
| 71 | +} |
| 72 | + |
| 73 | +</script> |
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