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<!doctype html>
<meta charset="utf-8">
<title>CSS Overflow Test: ::scroll-button() activation with column scroll markers</title>
<link rel="help" href="https://drafts.csswg.org/css-overflow-5/#scroll-buttons">
<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>
<style>
* {
margin: 0;
padding: 0;
}
#scroller {
width: 600px;
height: 300px;
overflow: auto;
columns: 1;
gap: 0;
column-fill: auto;
scroll-marker-group: after;
white-space: nowrap;
}
#scroller div {
background: green;
display: inline-block;
width: 600px;
height: 270px;
}
#scroller :first-child {
background: purple;
}
#scroller::scroll-marker-group {
border: 3px solid black;
padding: 5px;
display: flex;
height: 20px;
width: 40px;
}
#scroller::scroll-button(right) {
content: ">";
background: blue;
display: flex;
height: 20px;
width: 20px;
top: 0px;
left: 0px;
position: absolute;
z-index: 99;
}
#scroller::column::scroll-marker {
content: "";
width: 10px;
height: 10px;
background-color: blue;
border-radius: 100%;
display: inline-block;
}
</style>
<div id="scroller">
<div></div>
<br>
<div></div>
</div>
<script>
/*
Double click as recommended scroll amount is 85% of the page, so
to make sure all browsers reach the end.
*/
promise_test(async t => {
actions_promise = new test_driver.Actions()
.pointerMove(5, 5)
.pointerDown()
.pointerUp()
.pointerDown()
.pointerUp()
.send();
await actions_promise;
assert_equals(scroller.scrollLeft, 600);
});
</script>
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