| <!DOCTYPE HTML> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <title>scrollIntoView should only adjust scrollers in the containing block chain</title> |
| <style> |
| .scroller { |
| width: 300px; |
| height: 300px; |
| overflow: scroll; |
| } |
| |
| .contents { |
| width: 200%; |
| height: 300%; |
| } |
| |
| #inner.scroller { |
| position: absolute; |
| margin-top: 250px; |
| margin-left: 100px; |
| width: 400px |
| } |
| |
| #reveal { |
| margin-top: 400px; |
| background-color: blue; |
| } |
| </style> |
| <div id="container"> |
| <div id="outer" class="scroller"> |
| <div class="contents"> |
| This should not scroll |
| <div id="inner" class="inner scroller"> |
| <div class="contents"> |
| contents |
| <div id="reveal"> |
| Reveal me |
| </div> |
| </div> |
| </div> |
| </div> |
| </div> |
| </div> |
| <script> |
| add_completion_callback(() => document.getElementById("container").remove()); |
| |
| test(t => { |
| var reveal = document.getElementById('reveal'); |
| |
| var outerScroller = document.getElementById('outer'); |
| var innerScroller = document.getElementById('inner'); |
| var initialOuterTop = outerScroller.scrollTop; |
| var initialInnerTop = innerScroller.scrollTop; |
| |
| assert_equals(initialOuterTop, 0); |
| assert_equals(initialInnerTop, 0); |
| |
| reveal.scrollIntoView({block: "start", inline: "start"}); |
| |
| assert_approx_equals(innerScroller.scrollTop, 418, 4); |
| assert_equals(outerScroller.scrollTop, 0); |
| }, "scrollIntoView should not scroll ancestor overflow:scroll elements that are not containing block ancestors"); |
| </script> |
