| <!DOCTYPE HTML> |
| <html> |
| <head> |
| <style> |
| body { |
| margin: 0; |
| overflow: hidden; |
| } |
| |
| #container { |
| width: 300px; |
| height: 300px; |
| position: absolute; |
| top: 0; |
| left: 0; |
| overflow-x: auto; |
| overflow-y: hidden; |
| scroll-snap-type: x proximity; |
| direction: rtl; |
| } |
| |
| .drawer { |
| width: 900px; |
| height: 100%; |
| } |
| |
| .area { |
| height: 300px; |
| width: 300px; |
| float: left; |
| scroll-snap-align: start; |
| } |
| |
| .rtl { |
| direction: rtl; |
| } |
| .ltr { |
| direction: ltr; |
| } |
| </style> |
| <script src="../../../resources/js-test.js"></script> |
| <script src="../../../resources/ui-helper.js"></script> |
| <script> |
| window.jsTestIsAsync = true; |
| |
| async function runTest() |
| { |
| try { |
| await UIHelper.delayFor(0); |
| |
| let targetElement = document.getElementById("container"); |
| expectTrue(0 == targetElement.scrollLeft, "scroll origin is 0"); |
| |
| targetElement.scrollBy(-100, 0); |
| expectTrue(targetElement.scrollLeft == -100, "can escape first snap position"); |
| |
| targetElement.scrollBy(10, 0); |
| expectTrue(targetElement.scrollLeft == 0, "snapped back to first snap position"); |
| |
| targetElement.scrollBy(-295, 0); |
| expectTrue(targetElement.scrollLeft == -300, "snapped to second snap position"); |
| |
| targetElement.scrollBy(-10, 0); |
| targetElement.scrollBy(-10, 0); |
| |
| expectTrue(targetElement.scrollLeft == -320, "can escape second snap position to the left"); |
| |
| targetElement.scrollBy(1, 0); |
| expectTrue(targetElement.scrollLeft == -300, "snapped back to second snap position"); |
| |
| targetElement.scrollBy(10, 0); |
| targetElement.scrollBy(10, 0); |
| expectTrue(targetElement.scrollLeft == -280, "can escape second snap position to the right"); |
| |
| targetElement.scrollBy(-1, 0); |
| expectTrue(targetElement.scrollLeft == -300, "snapped back to second snap position"); |
| } catch (e) { |
| console.log(e); |
| } finally { |
| finishJSTest(); |
| } |
| } |
| |
| function run() { |
| if (!window.eventSender) { |
| write("To manually test, verify that scrolling near one of the boundaries between the colored boxes"); |
| write("snaps to the edge of the nearest colored box, but scrolling somewhere near the middle of two"); |
| write("boxes does not cause the scroll offset to snap."); |
| return; |
| } |
| runTest(); |
| } |
| </script> |
| </head> |
| <body onload=run()> |
| <div id="container"> |
| <div class="drawer"> |
| <div class="area rtl" style="background-color: red;"></div> |
| <div class="area ltr" style="background-color: blue;"></div> |
| <div class="area rtl" style="background-color: aqua;"></div> |
| </div> |
| </div> |
| <div id="output"></div> |
| </body> |
| </html> |
