| <!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; |
| } |
| iframe { |
| width: 180px; |
| height: 100px; |
| } |
| </style> |
| |
| <iframe id="iframe" srcdoc="<div id='target' style='margin:0.5px;width:1000px;height:1000px;'></div>"></iframe> |
| |
| <script> |
| var target; |
| var entries = []; |
| var observer; |
| var iframe = document.getElementById("iframe"); |
| |
| iframe.onload = function() { |
| runTestCycle(function() { |
| target = iframe.contentDocument.getElementById("target"); |
| assert_true(!!target, "Target element exists."); |
| 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(test0, "First rAF should generate notification."); |
| }, "IntersectionObserverEntry.boundingClientRect should match target.boundingClientRect()"); |
| }; |
| |
| function test0() { |
| assert_equals(entries.length, 1, "One notification."); |
| var bcr = target.getBoundingClientRect(); |
| checkLastEntry(entries, 0, [bcr.left, bcr.right, bcr.top, bcr.bottom]); |
| } |
| </script> |
