same-document-with-document-root.html (1775B)
1 <!DOCTYPE html> 2 <meta name="viewport" content="width=device-width,initial-scale=1"> 3 <script src="/resources/testharness.js"></script> 4 <script src="/resources/testharnessreport.js"></script> 5 <script src="./resources/intersection-observer-test-utils.js"></script> 6 7 <style> 8 pre, 9 #log { 10 position: absolute; 11 top: 0; 12 left: 200px; 13 } 14 15 .spacer { 16 height: calc(100vh + 100px); 17 } 18 19 #target { 20 width: 100px; 21 height: 100px; 22 background-color: green; 23 } 24 </style> 25 26 <div class="spacer"></div> 27 <div id="target"></div> 28 <div class="spacer"></div> 29 30 <script> 31 var vw = document.documentElement.clientWidth; 32 var vh = document.documentElement.clientHeight; 33 34 var entries = []; 35 var target; 36 37 runTestCycle(function () { 38 target = document.getElementById("target"); 39 assert_true(!!target, "target exists"); 40 var observer = new IntersectionObserver(function (changes) { 41 entries = entries.concat(changes) 42 }, {root: document}); 43 observer.observe(target); 44 entries = entries.concat(observer.takeRecords()); 45 assert_equals(entries.length, 0, "No initial notifications."); 46 runTestCycle(step0, "First rAF."); 47 }, "IntersectionObserver in a single document using document as root."); 48 49 function step0() { 50 document.scrollingElement.scrollTop = 300; 51 runTestCycle(step1, "document.scrollingElement.scrollTop = 300"); 52 checkLastEntry(entries, 0, [8, 108, vh + 108, vh + 208, 0, 0, 0, 0, 0, vw, 0, vh, false]); 53 } 54 55 function step1() { 56 document.scrollingElement.scrollTop = 0; 57 checkLastEntry(entries, 1, [8, 108, vh - 192, vh - 92, 8, 108, vh - 192, vh - 92, 0, vw, 0, vh, true]); 58 } 59 </script>