| <!DOCTYPE html> |
| <link rel="help" href="https://drafts.csswg.org/css-scroll-snap-1/#unreachable" /> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <style> |
| div { |
| position: absolute; |
| margin: 0px; |
| } |
| #scroller { |
| height: 500px; |
| width: 500px; |
| overflow: hidden; |
| scroll-snap-type: both mandatory; |
| } |
| #unreachable { |
| width: 300px; |
| height: 300px; |
| top: -100px; |
| left: -100px; |
| background-color: blue; |
| scroll-snap-align: start; |
| } |
| #reachable { |
| width: 300px; |
| height: 300px; |
| top: 400px; |
| left: 400px; |
| background-color: blue; |
| scroll-snap-align: start; |
| } |
| </style> |
| |
| <div id="scroller"> |
| <div style="width: 2000px; height: 2000px;"></div> |
| <div id="unreachable"></div> |
| <div id="reachable"></div> |
| </div> |
| |
| <script> |
| test(() => { |
| // Firstly move to the reachable snap position. |
| scroller.scrollTo(400, 400); |
| assert_equals(scroller.scrollLeft, 400); |
| assert_equals(scroller.scrollTop, 400); |
| |
| // Then move to a position between the unreachable snap position and the |
| // reachable position but closer to the unreachable one. |
| scroller.scrollTo(100, 100); |
| assert_equals(scroller.scrollLeft, 0); |
| assert_equals(scroller.scrollTop, 0); |
| }, "Snaps to the positions defined by the element as much as possible"); |
| </script> |
