| <!DOCTYPE html> |
| <meta name="viewport" content="width=device-width,initial-scale=1"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="./resources/intersection-observer-test-utils.js"></script> |
| |
| <style> |
| pre, #log { |
| position: absolute; |
| top: 0; |
| left: 200px; |
| } |
| #root { |
| overflow: visible; |
| height: 200px; |
| width: 160px; |
| border: 8px solid black; |
| } |
| #target { |
| margin: 10px; |
| width: 100px; |
| height: 100px; |
| padding: 10px; |
| background-color: green; |
| } |
| </style> |
| |
| <div id="root"> |
| <div id="target" style="transform: translateY(300px)"></div> |
| </div> |
| |
| <script> |
| var entries = []; |
| var target; |
| |
| runTestCycle(function() { |
| target = document.getElementById("target"); |
| assert_true(!!target, "target exists"); |
| var root = document.getElementById("root"); |
| assert_true(!!root, "root exists"); |
| var observer = new IntersectionObserver(function(changes) { |
| entries = entries.concat(changes) |
| }, {root: root}); |
| observer.observe(target); |
| entries = entries.concat(observer.takeRecords()); |
| assert_equals(entries.length, 0, "No initial notifications."); |
| runTestCycle(step0, "First rAF."); |
| }, "Test that the target's border bounding box is used to calculate intersection."); |
| |
| function step0() { |
| var targetBounds = clientBounds(target); |
| target.style.transform = "translateY(195px)"; |
| runTestCycle(step1, "target.style.transform = 'translateY(195px)'"); |
| checkLastEntry(entries, 0, targetBounds.concat(0, 0, 0, 0, 8, 184, 8, 224, false)); |
| } |
| |
| function step1() { |
| var targetBounds = clientBounds(target); |
| target.style.transform = "translateY(300px)"; |
| runTestCycle(step2, "target.style.transform = 'translateY(300px)'"); |
| checkLastEntry(entries, 1, targetBounds.concat(26, 146, 221, 224, 8, 184, 8, 224, true)); |
| } |
| |
| function step2() { |
| var targetBounds = clientBounds(target); |
| target.style.transform = ""; |
| target.style.zoom = "2"; |
| runTestCycle(step3, "target.style.zoom = 2"); |
| checkLastEntry(entries, 2, targetBounds.concat(0, 0, 0, 0, 8, 184, 8, 224, false)); |
| } |
| |
| function step3() { |
| var targetBounds = clientBounds(target); |
| var intersectionWidth = ( |
| 176 // root width including border |
| -8 // root left border |
| -20 // target left margin * target zoom |
| ) / 2; // convert to target's zoom factor. |
| var intersectionHeight = (216 - 8 - 20) / 2; |
| var intersectionRect = [targetBounds[0], targetBounds[0] + intersectionWidth, |
| targetBounds[2], targetBounds[2] + intersectionHeight]; |
| checkLastEntry(entries, 3, targetBounds.concat(intersectionRect).concat(8, 184, 8, 224, true)); |
| } |
| |
| </script> |
