| <!DOCTYPE html> |
| <html> |
| <head> |
| <style> |
| #container { |
| position: absolute; |
| width: 400px; |
| height: 400px; |
| top: 0; |
| left: 0; |
| scroll-snap-type: y mandatory; |
| overflow-x: hidden; |
| overflow-y: scroll; |
| opacity: 0.75; |
| background-color: #EEE; |
| padding: 10px; |
| } |
| |
| .child { |
| width: 400px; |
| height: 400px; |
| padding-top: 100px; |
| padding-bottom: 50px; |
| left: 0; |
| } |
| </style> |
| <script> |
| let write = s => output.innerHTML += s + "<br>"; |
| if (window.testRunner) { |
| testRunner.dumpAsText(); |
| testRunner.waitUntilDone(); |
| } |
| |
| function run() |
| { |
| if (!window.testRunner || !window.internals) { |
| write(`To manually test, verify that scrolling in the container snaps such that:`); |
| write(`- The first and fourth boxes align their top edge to the top edge of the scrolling container`); |
| write(`- The second and fifth boxes align their center to the center of the scrolling container`); |
| write(`- The third and sixth boxes align their bottom edge to the bottom edge of the scrolling container`); |
| return; |
| } |
| |
| setTimeout(() => { |
| write("Scroll-snap offsets are: " + internals.scrollSnapOffsets(container)); |
| testRunner.notifyDone(); |
| }, 0); |
| } |
| </script> |
| </head> |
| <body onload=run()> |
| <div id="container"> |
| <div class="child" style="background-color: red; scroll-snap-align: start;"></div> |
| <div class="child" style="background-color: green; scroll-snap-align: center;"></div> |
| <div class="child" style="background-color: blue; scroll-snap-align: end;"></div> |
| <div class="child" style="background-color: aqua; scroll-snap-align: start;"></div> |
| <div class="child" style="background-color: yellow; scroll-snap-align: center;"></div> |
| <div class="child" style="background-color: fuchsia; scroll-snap-align: end;"></div> |
| </div> |
| <div id="output"></div> |
| </body> |
| </html> |
