| <!DOCTYPE html> |
| <link rel="help" href="https://drafts.csswg.org/css-scroll-snap/#scroll-snap-stop" /> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <style> |
| div { |
| position: absolute; |
| } |
| #scroller { |
| width: 400px; |
| height: 400px; |
| overflow: scroll; |
| scroll-snap-type: both mandatory; |
| } |
| #space { |
| left: 0px; |
| top: 0px; |
| width: 2100px; |
| height: 2100px; |
| } |
| .target { |
| width: 50px; |
| height: 50px; |
| scroll-snap-align: start; |
| } |
| .origin { |
| left: 0px; |
| top: 0px; |
| } |
| .always-stop { |
| left: 100px; |
| top: 0px; |
| scroll-snap-stop: always; |
| } |
| .closer { |
| left: 200px; |
| top: 0px; |
| } |
| </style> |
| |
| <div id="scroller"> |
| <div id="space"></div> |
| <div class="target origin"></div> |
| <div class="target always-stop"></div> |
| <div class="target closer"></div> |
| </div> |
| |
| <script> |
| var scroller = document.getElementById("scroller"); |
| test(() => { |
| scroller.scrollTo(0, 0); |
| assert_equals(scroller.scrollLeft, 0); |
| assert_equals(scroller.scrollTop, 0); |
| |
| scroller.scrollBy(300, 0); |
| assert_equals(scroller.scrollLeft, 100); |
| assert_equals(scroller.scrollTop, 0); |
| }, "A scroll with intended direction and end position should not pass a snap " + |
| "area with scroll-snap-stop: always.") |
| |
| test(() => { |
| scroller.scrollTo(0, 0); |
| assert_equals(scroller.scrollLeft, 0); |
| assert_equals(scroller.scrollTop, 0); |
| |
| scroller.scrollTo(300, 0); |
| assert_equals(scroller.scrollLeft, 200); |
| assert_equals(scroller.scrollTop, 0); |
| }, "A scroll with intended end position should always choose the closest snap " + |
| "position regardless of the scroll-snap-stop value.") |
| |
| // Tests for programmatic scrolls beyond the scroller bounds. |
| |
| test(() => { |
| scroller.scrollTo(0, 0); |
| assert_equals(scroller.scrollLeft, 0); |
| assert_equals(scroller.scrollTop, 0); |
| |
| scroller.scrollBy(100000, 0); |
| assert_equals(scroller.scrollLeft, 100); |
| assert_equals(scroller.scrollTop, 0); |
| }, "A scroll outside bounds in the snapping axis with intended direction and " + |
| "end position should not pass a snap area with scroll-snap-stop: always.") |
| |
| test(() => { |
| scroller.scrollTo(0, 0); |
| assert_equals(scroller.scrollLeft, 0); |
| assert_equals(scroller.scrollTop, 0); |
| |
| scroller.scrollBy(300, -10); |
| assert_equals(scroller.scrollLeft, 100); |
| assert_equals(scroller.scrollTop, 0); |
| }, "A scroll outside bounds in the non-snapping axis with intended direction " + |
| "and end position should not pass a snap area with scroll-snap-stop: always.") |
| |
| </script> |
