| <!DOCTYPE html> |
| <title>IntersectionObserver observing elements with css zoom</title> |
| <link rel="author" title="Yotam Hacohen" href="mailto:[email protected]"> |
| <link rel="author" title="Google" href="http://www.google.com/"> |
| <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> |
| <head> |
| <style> |
| div { |
| width: 64px; |
| height: 64px; |
| background-color: blue |
| } |
| div.a { |
| zoom: 1.0; |
| width: 512px; |
| height: 512px; |
| } |
| |
| div.b { |
| zoom: 4.0; |
| background-color: pink; |
| } |
| </style> |
| </head> |
| <body> |
| <div class="a" id="ToBeRemoved"> |
| <div class="b" id="target"></div> |
| </div> |
| <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(validateIntersectionRect, "Validate intersection rect"); |
| }); |
| function validateIntersectionRect() { |
| // The numbers in brackets are target client rect; intersection rect; |
| // and root bounds. |
| checkLastEntry(entries, 0, [ |
| // the 8 pixels comes from the html body padding. |
| 8, 8 + 256, 8, 8 + 256, |
| 8, 8 + 256, 8, 8 + 256, |
| 0, viewportWidth, 0, viewportHeight, |
| true, |
| ]); |
| } |
| </script> |
| </body> |
