| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta viewport="width=device-width, initial-scale=1" /> |
| <link rel="help" href="https://drafts.csswg.org/css-scroll-snap-1/#scroll-snap-type" /> |
| <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="/dom/events/scrolling/scroll_support.js"></script> |
| </head> |
| <body> |
| <style> |
| #scroller { |
| width: 200px; |
| height: 400px; |
| overflow-y: scroll; |
| scroll-snap-type: y mandatory; |
| background-color: blue; |
| } |
| #snap_target { |
| width: 100px; |
| height: 1942.5px; |
| scroll-snap-align: start; |
| background-color: pink; |
| } |
| </style> |
| <div id="scroller"> |
| <div id="snap_target"></div> |
| </div> |
| <script> |
| promise_test(async (t) => { |
| await waitForCompositorCommit(); |
| let scrollend_promise = new Promise((resolve) => { |
| scroller.addEventListener("scrollend", resolve); |
| }); |
| let scroll_promise = new Promise((resolve) => { |
| scroller.addEventListener("scroll", resolve); |
| }); |
| await new test_driver.Actions().scroll(0, 0, 0, |
| scroller.scrollHeight, { origin: scroller }).send(); |
| await scroll_promise; |
| await scrollend_promise; |
| assert_approx_equals(scroller.scrollTop, |
| scroller.scrollHeight - scroller.clientHeight, 1, |
| "scroller is scrolled to its bottom and not its top."); |
| }, "snapport covered by snap area doesn't jump"); |
| </script> |
| </body> |
| </html> |
