| <!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; |
| } |
| .spacer { |
| height: calc(100vh + 100px); |
| } |
| iframe { |
| height: 100px; |
| width: 150px; |
| } |
| </style> |
| |
| <div class="spacer"></div> |
| <div style="overflow: hidden"> |
| <iframe id="target-iframe" src="resources/iframe-no-root-subframe.html"></iframe> |
| </div> |
| <div class="spacer"></div> |
| |
| <script> |
| var vw = document.documentElement.clientWidth; |
| var vh = document.documentElement.clientHeight; |
| |
| var iframe = document.getElementById("target-iframe"); |
| var target; |
| var entries = []; |
| |
| iframe.onload = function() { |
| runTestCycle(function() { |
| assert_true(!!iframe, "iframe exists"); |
| |
| target = iframe.contentDocument.getElementById("target"); |
| assert_true(!!target, "Target element exists."); |
| var 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."); |
| }, "Observer with the implicit root; target in a same-origin iframe."); |
| }; |
| |
| function step0() { |
| document.scrollingElement.scrollTop = 200; |
| runTestCycle(step1, "document.scrollingElement.scrollTop = 200"); |
| checkLastEntry(entries, 0, [8, 108, 208, 308, 0, 0, 0, 0, 0, vw, 0, vh, false]); |
| } |
| |
| function step1() { |
| iframe.contentDocument.scrollingElement.scrollTop = 250; |
| runTestCycle(step2, "iframe.contentDocument.scrollingElement.scrollTop = 250"); |
| assert_equals(entries.length, 1, "entries.length == 1"); |
| } |
| |
| function step2() { |
| document.scrollingElement.scrollTop = 100; |
| runTestCycle(step3, "document.scrollingElement.scrollTop = 100"); |
| checkLastEntry(entries, 1, [8, 108, -42, 58, 8, 108, 0, 58, 0, vw, 0, vh, true]); |
| } |
| |
| function step3() { |
| checkLastEntry(entries, 2, [8, 108, -42, 58, 0, 0, 0, 0, 0, vw, 0, vh, false]); |
| document.scrollingElement.scrollTop = 0; |
| } |
| </script> |
