| <!DOCTYPE html> |
| <title>IntersectionObserver observing an SVG <rect> element with changing 'transform'</title> |
| <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> |
| <svg viewBox="0 0 200 100" width="400"> |
| <rect id="target" x="50" y="25" width="100" height="50" fill="blue"/> |
| </svg> |
| <script> |
| const viewportWidth = document.documentElement.clientWidth; |
| const viewportHeight = document.documentElement.clientHeight; |
| setup(() => { |
| window.entries = []; |
| window.target = document.getElementById("target"); |
| window.targetRect = target.getBoundingClientRect(); |
| }); |
| runTestCycle(function() { |
| assert_true(!!target, "target exists"); |
| const observer = new IntersectionObserver(function(changes) { |
| entries = entries.concat(changes); |
| }); |
| observer.observe(target); |
| entries = entries.concat(observer.takeRecords()); |
| assert_equals(entries.length, 0, "No initial notifications"); |
| runTestCycle(step0, "First rAF."); |
| }); |
| function step0() { |
| target.style.transform = "translate(0, 150px)"; |
| runTestCycle(step1, "translated down by 150 units (out of SVG viewport)"); |
| // The numbers in brackets are target client rect; intersection rect; |
| // and root bounds. |
| checkLastEntry(entries, 0, [ |
| 108, 108 + targetRect.width, 58, 58 + targetRect.height, |
| 108, 108 + targetRect.width, 58, 58 + targetRect.height, |
| 0, viewportWidth, 0, viewportHeight, |
| true, |
| ]); |
| } |
| function step1() { |
| target.style.transform = "translate(0, 50px)"; |
| runTestCycle(step2, "translated down by 50 units"); |
| checkLastEntry(entries, 1, [ |
| 108, 108 + targetRect.width, 8 + (25 + 150) * 2, 8 + (25 + 150) * 2 + targetRect.height, |
| 0, 0, 0, 0, |
| 0, viewportWidth, 0, viewportHeight, |
| false, |
| ]); |
| } |
| function step2() { |
| target.style.transform = ""; |
| checkLastEntry(entries, 2, [ |
| 108, 108 + targetRect.width, 8 + (25 + 50) * 2, 8 + (25 + 50) * 2 + targetRect.height, |
| 108, 108 + targetRect.width, 8 + (25 + 50) * 2, 8 + (25 + 50) * 2 + targetRect.height / 2, |
| 0, viewportWidth, 0, viewportHeight, |
| true, |
| ]); |
| } |
| </script> |
