| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <title>scrollIntoView on a scroller does not scroll the targeted scroll container</title> |
| <link rel="help" href="https://drafts.csswg.org/cssom-view/#dom-element-scrollintoview"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <style> |
| .scroller { |
| overflow: scroll; |
| position: relative; |
| border: 2px solid black; |
| } |
| #outer { |
| width: 300px; |
| height: 400px; |
| border-color: blue; |
| } |
| #inner { |
| height: 200px; |
| border-color: red; |
| background: lightgreen; |
| /* Scroll padding on the inner scroller makes the scroll into view |
| * position of content within non-zero. */ |
| scroll-padding: 50px; |
| /* Scroll margin is the offset in the outer scroller to preserve. */ |
| scroll-margin: 20px; |
| } |
| .spacer { |
| height: 1000px; |
| } |
| </style> |
| |
| <div id="outer" class="scroller"> |
| <div class="spacer"></div> |
| <div id="inner" class="scroller"> |
| <div class="spacer"></div> |
| </div> |
| <div class="spacer"></div> |
| </div> |
| |
| <script> |
| promise_test(async t => { |
| const outerScroller = document.getElementById('outer'); |
| const innerScroller = document.getElementById('inner'); |
| |
| innerScroller.scrollTop = 200; |
| innerScroller.scrollIntoView(); |
| |
| assert_equals(innerScroller.offsetTop - outerScroller.scrollTop, 20, "Should scroll inner scroller to scroll margin offset."); |
| assert_equals(innerScroller.scrollTop, 200, "Inner scroller should not scroll when asked to scroll into view."); |
| }, "scrollIntoView on a scrolling container should scroll its outer scrollers into view but not scroll itself."); |
| </script> |
