| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title> CSS Scroll Snap 2 Test: Snap Events with pseudo-element targets.</title> |
| <link rel="help" href="https://drafts.csswg.org/css-scroll-snap-2/#snap-events"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/resources/testdriver.js"></script> |
| <script src="/resources/testdriver-actions.js"></script> |
| <script src="/resources/testdriver-vendor.js"></script> |
| <script src="/css/css-scroll-snap-2/resources/common.js"></script> |
| <script src="/css/css-scroll-snap-2/resources/user-scroll-common.js"></script> |
| <script src="/dom/events/scrolling/scroll_support.js"></script> |
| </head> |
| <body> |
| <style> |
| .scroller { |
| overflow: scroll; |
| width: 200px; |
| height: 200px; |
| border: solid 1px black; |
| scroll-snap-type: y mandatory; |
| position: absolute; |
| resize: both; |
| } |
| .space { |
| height: 300vh; |
| width: 300vw; |
| position: absolute; |
| } |
| .scroller::before, .scroller::after { |
| scroll-snap-align: start; |
| height: 50px; |
| width: 50px; |
| color: white; |
| display: block; |
| } |
| .scroller::before { |
| content: "before"; |
| background-color: blue; |
| } |
| .scroller::after { |
| content: "after"; |
| background-color: orange; |
| margin-top: 100px; |
| } |
| </style> |
| <div class="scroller" id="scroller"> |
| <div class="space"></div> |
| </div> |
| |
| <script> |
| const start_pos = { |
| x: scroller.clientWidth / 2, |
| y: scroller.clientHeight / 2, |
| }; |
| const end_pos = { x: scroller.clientWidth / 2, y: 0 }; |
| // The top of the ::after pseudo element is the sum of the |
| // ::before pseudo-element's height (50) and the ::after |
| // pseudo-element's margin-top (100). |
| const after_pseudo_element_top = 50 + 100; |
| const test_data = { |
| scroller: scroller, |
| scrolling_function: async () => { |
| await snap_event_touch_scroll_helper(start_pos, end_pos); |
| }, |
| expected_snap_targets: { block: scroller, inline: null }, |
| expected_scroll_offsets: { |
| x: 0, |
| y: after_pseudo_element_top, |
| } |
| }; |
| |
| promise_test(async (t) => { |
| await test_scrollsnapchange(t, test_data); |
| }, "snapTarget for scrollsnapchange is the owning element when a snap area " + |
| "belongs to a pseudo-element"); |
| |
| promise_test(async (t) => { |
| await test_snap_event(t, test_data, "scrollsnapchanging"); |
| }, "snapTarget for scrollsnapchanging is the owning element when a snap area " + |
| "belongs to a pseudo-element"); |
| </script> |
| </body> |
| </html> |
