| <!DOCTYPE html> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="./intersection-observer-test-utils.js"></script> |
| |
| <style> |
| #root { |
| width: 200px; |
| height: 200px; |
| } |
| #scroller { |
| width: 160px; |
| height: 200px; |
| overflow-y: scroll; |
| } |
| #target { |
| width: 100px; |
| height: 100px; |
| background-color: green; |
| } |
| .spacer { |
| height: 300px; |
| } |
| </style> |
| |
| <div id="root"> |
| <div id="scroller"> |
| <div class="spacer"></div> |
| <div id="target"></div> |
| <div class="spacer"></div> |
| </div> |
| </div> |
| |
| <script> |
| setup({message_events: [], output_document: window.parent.document}); |
| |
| var entries = []; |
| var root, scroller, target; |
| |
| runTestCycle(function() { |
| root = document.getElementById("root"); |
| assert_true(!!root, "Root element exists."); |
| scroller = document.getElementById("scroller"); |
| assert_true(!!scroller, "Scroller element exists."); |
| target = document.getElementById("target"); |
| assert_true(!!target, "Target element 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(step1, "First rAF."); |
| }, "IntersectionObserver in iframe with explicit root."); |
| |
| function step1() { |
| scroller.scrollTop = 250; |
| runTestCycle(step2, "scroller.scrollTop = 250"); |
| checkLastEntry(entries, 0, [8, 108, 308, 408, 0, 0, 0, 0, 8, 208, 8, 208, false]); |
| } |
| |
| function step2() { |
| checkLastEntry(entries, 1, [8, 108, 58, 158, 8, 108, 58, 158, 8, 208, 8, 208, true]); |
| } |
| </script> |
