| <!DOCTYPE html> |
| <script src="../resources/js-test.js"></script> |
| <script src="helper-functions.js"></script> |
| <style> |
| #root { |
| overflow: visible; |
| height: 200px; |
| width: 200px; |
| border: 7px solid black; |
| } |
| #target { |
| width: 100px; |
| height: 100px; |
| background-color: green; |
| } |
| </style> |
| <div id="root"> |
| <div id="target" style="transform: translateY(300px)"></div> |
| </div> |
| |
| <script> |
| description("Test that border bounding box is used to calculate intersection with a non-scrolling root."); |
| var target = document.getElementById("target"); |
| var root = document.getElementById("root"); |
| var entries = []; |
| var observer = new IntersectionObserver( |
| changes => { entries.push(...changes) }, |
| { root: document.getElementById("root") } |
| ); |
| |
| onload = function() { |
| observer.observe(target); |
| entries.push(...observer.takeRecords()); |
| shouldBeEqualToNumber("entries.length", 0); |
| // See README for explanation of double RAF. |
| requestAnimationFrame(() => { requestAnimationFrame(step0) }); |
| } |
| |
| function step0() { |
| entries.push(...observer.takeRecords()); |
| shouldBeEqualToNumber("entries.length", 0); |
| target.style.transform = "translateY(195px)"; |
| requestAnimationFrame(step1); |
| } |
| |
| function step1() { |
| entries.push(...observer.takeRecords()); |
| shouldBeEqualToNumber("entries.length", 1); |
| if (entries.length > 0) { |
| shouldBeEqualToNumber("entries[0].boundingClientRect.left", 15); |
| shouldBeEqualToNumber("entries[0].boundingClientRect.right", 115); |
| shouldBeEqualToNumber("entries[0].boundingClientRect.top", 210); |
| shouldBeEqualToNumber("entries[0].boundingClientRect.bottom", 310); |
| shouldBeEqualToNumber("entries[0].intersectionRect.left", 15); |
| shouldBeEqualToNumber("entries[0].intersectionRect.right", 115); |
| shouldBeEqualToNumber("entries[0].intersectionRect.top", 210); |
| shouldBeEqualToNumber("entries[0].intersectionRect.bottom", 222); |
| shouldBeEqualToNumber("entries[0].rootBounds.left", 8); |
| shouldBeEqualToNumber("entries[0].rootBounds.right", 222); |
| shouldBeEqualToNumber("entries[0].rootBounds.top", 8); |
| shouldBeEqualToNumber("entries[0].rootBounds.bottom", 222); |
| shouldEvaluateToSameObject("entries[0].target", target); |
| } |
| |
| finishJSTest(); |
| } |
| </script> |