| <!DOCTYPE html> |
| <title> |
| Adding a new snap area while already snapped should not make the scroller snap to it. |
| </title> |
| <link rel="help" href="https://drafts.csswg.org/css-scroll-snap/#re-snap" /> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <style> |
| div { |
| position: absolute; |
| margin: 0; |
| } |
| |
| #scroller { |
| height: 500px; |
| width: 500px; |
| overflow: hidden; |
| scroll-snap-type: both mandatory; |
| } |
| |
| #initial-target { |
| width: 300px; |
| height: 300px; |
| top: 100px; |
| left: 100px; |
| background-color: green; |
| scroll-snap-align: start; |
| } |
| |
| #other-target { |
| width: 300px; |
| height: 300px; |
| top: 300px; |
| left: 300px; |
| background-color: red; |
| scroll-snap-align: start; |
| } |
| |
| .area { |
| width: 2000px; |
| height: 2000px; |
| } |
| </style> |
| |
| <div id="scroller"> |
| <div class="area"></div> |
| <div id="initial-target"></div> |
| <div id="other-target"></div> |
| </div> |
| |
| <script> |
| const initial_target = document.getElementById("initial-target"); |
| const other_target = document.getElementById("other-target"); |
| const scroller = document.getElementById("scroller"); |
| |
| test(() => { |
| scroller.removeChild(other_target); |
| scroller.scrollTo(0,0); |
| assert_equals(scroller.scrollTop, 100); |
| assert_equals(scroller.scrollLeft, 100); |
| |
| scroller.appendChild(other_target); |
| assert_equals(scroller.scrollTop, 100); |
| assert_equals(scroller.scrollLeft, 100); |
| }, "Adding a new snap area while already snapped should not make the scroller snap to it."); |
| </script> |
