| <!DOCTYPE html> |
| <html> |
| |
| <head> |
| <meta charset="utf-8"> |
| <title> CSS Scroll Snap 2 Test: scroll-initial-target*</title> |
| <link rel="help" href="https://drafts.csswg.org/css-scroll-snap-2/#scroll-initial-target"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| </head> |
| |
| <body> |
| <style> |
| .spacer { |
| width: 1000px; |
| height: 1000px; |
| } |
| |
| .scroller { |
| width: 300px; |
| height: 300px; |
| border: solid 1px black; |
| overflow: scroll; |
| margin: 0px; |
| position: absolute; |
| } |
| |
| .box { |
| position: absolute; |
| width: 200px; |
| height: 200px; |
| } |
| |
| .top_left { |
| top: 0px; |
| left: 0px; |
| background-color: red; |
| } |
| |
| .target { |
| scroll-initial-target: nearest; |
| } |
| |
| .center { |
| top: 200px; |
| left: 200px; |
| background-color: purple; |
| } |
| |
| .bottom_right { |
| top: 400px; |
| left: 400px; |
| background-color: yellow; |
| } |
| </style> |
| <div class="scroller" id="scroller"> |
| <div class="spacer"></div> |
| <div class="top_left box" id="top_left_box"></div> |
| <div class="center box target" id="centerbox"></div> |
| <div class="bottom_right box"></div> |
| </div> |
| <script> |
| test((t) => { |
| let scroller = document.getElementById("scroller"); |
| let top_left_box = document.getElementById("top_left_box"); |
| |
| const expected_scroll_top = top_left_box.getBoundingClientRect().height; |
| const expected_scroll_left = top_left_box.getBoundingClientRect().width; |
| |
| assert_approx_equals(scroller.scrollTop, expected_scroll_top, 1, |
| "scroll-initial-target sets initial vertical scroll position"); |
| assert_approx_equals(scroller.scrollLeft, expected_scroll_left, 1, |
| "scroll-initial-target sets initial horizontal scroll position"); |
| }); |
| </script> |
| </body> |
