visual-scrollIntoView-002.html (1807B)
1 <!DOCTYPE html> 2 <html> 3 <meta name="viewport" content="width=device-width,initial-scale=1"> 4 <script src="/resources/testharness.js"></script> 5 <script src="/resources/testharnessreport.js"></script> 6 <script src="/resources/testdriver.js"></script> 7 <script src="/resources/testdriver-actions.js"></script> 8 <script src="/resources/testdriver-vendor.js"></script> 9 <script src="support/action-utils.js"></script> 10 <link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1947470"> 11 <link rel="help" href="https://drafts.csswg.org/cssom-view/#perform-a-scroll"> 12 <style> 13 html { 14 height: 10000px; 15 } 16 body { 17 margin: 0px; 18 padding: 0px; 19 } 20 #fixed { 21 position: fixed; 22 bottom: 0px; 23 height: 50vh; 24 width: 100vw; 25 overflow: scroll; 26 background-color: gray; 27 } 28 input { 29 height: 20px; 30 } 31 </style> 32 <div id="fixed"> 33 <div style="height: calc(80vh - 40px)"></div> 34 <input type="text" id="name" /> 35 </div> 36 <script> 37 promise_test(async t => { 38 assert_equals(window.scrollY, 0); 39 assert_equals(visualViewport.scale, 1.0); 40 assert_equals(visualViewport.pageTop, 0); 41 42 // Pinch zoom in this document. 43 await pinch_zoom_action(); 44 45 assert_greater_than(visualViewport.scale, 1.0); 46 47 // Scroll the root scroll container. 48 window.scrollTo(0, 1000); 49 assert_equals(window.scrollY, 1000); 50 51 const expectedPageTop = visualViewport.pageTop; 52 53 // Now trigger a scrollIntoView call to an element inside a position:fixed element. 54 scrollPromise = 55 new Promise(resolve => visualViewport.addEventListener("scroll", resolve)); 56 document.querySelector('#name').scrollIntoView({ behavior: "instant" }); 57 await scrollPromise; 58 59 assert_greater_than(visualViewport.pageTop, expectedPageTop); 60 }, "Element.scrollIntoView scrolls visually to a position: fixed element with non-zero layout scroll offset"); 61 </script>