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Test Info: Warnings
- This test has a WPT meta file that expects 1 subtest issues.
- This WPT test may be referenced by the following Test IDs:
- /css/css-scrollbars/scrollbar-width-016.html - WPT Dashboard Interop Dashboard
<!doctype html>
<meta charset="utf-8">
<title>CSS Scrollbars: scrollbar-width on scrollable areas correctly interacts with ::-webkit-scrollbar on container</title>
<link rel="author" title="Luke Warlow" href="mailto:luke@warlow.dev" />
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/parsing-testcommon.js"></script>
<style>
.container {
overflow: auto;
height: 200px;
width: 200px;
margin: 1px;
padding: 0px;
border: none;
background: deepskyblue;
}
.content {
height: 300px;
width: 100%;
background: lightsalmon;
}
.container.auto {
scrollbar-width: auto;
}
.container.auto::-webkit-scrollbar {
display: none;
}
/* This is so that browsers that don't implement the WebKit prefix still pass the test */
@supports not selector(::-webkit-scrollbar) {
.container.auto {
overflow: hidden;
}
}
.container.thin {
scrollbar-width: thin;
}
.container.thin::-webkit-scrollbar {
display: none;
}
.container.none {
scrollbar-width: none;
}
.container.none::-webkit-scrollbar {
width: 20px;
background-color: lightgray;
}
</style>
<script>
function performTest() {
setup({ explicit_done: true });
// ltr
test(function () {
let container = document.getElementById('container_auto');
let content = document.getElementById('content_auto');
assert_equals(container.scrollWidth, 200, "auto scrollWidth");
assert_equals(container.clientWidth, 200, "auto clientWidth");
assert_equals(container.offsetLeft, content.offsetLeft, "auto offsetLeft");
assert_equals(container.clientWidth, content.clientWidth, "auto clientWidth");
assert_equals(container.offsetWidth, content.offsetWidth, "auto offsetWidth");
}, "scrollbar-width auto defers to ::-webkit-scrollbar");
test(function () {
let container = document.getElementById('container_thin');
let content = document.getElementById('content_thin');
assert_less_than(container.scrollWidth, container.offsetWidth, "thin scrollWidth");
assert_less_than(container.clientWidth, container.offsetWidth, "thin clientWidth");
assert_equals(container.offsetLeft, content.offsetLeft, "thin offsetLeft");
assert_equals(container.clientWidth, content.clientWidth, "thin clientWidth");
assert_not_equals(container.offsetWidth, content.offsetWidth, "thin offsetWidth");
}, "scrollbar-width thin overrides ::-webkit-scrollbar");
test(function () {
let container = document.getElementById('container_none');
let content = document.getElementById('content_none');
assert_equals(container.scrollWidth, 200, "none scrollWidth");
assert_equals(container.clientWidth, 200, "none clientWidth");
assert_equals(container.offsetLeft, content.offsetLeft, "none offsetLeft");
assert_equals(container.clientWidth, content.clientWidth, "none clientWidth");
assert_equals(container.offsetWidth, content.offsetWidth, "none offsetWidth");
}, "scrollbar-width none overrides ::-webkit-scrollbar");
done();
}
</script>
<body onload="performTest()">
Test scrollbar-width: vertical scrollbar
<div class="container auto" id="container_auto">
<div class="content" id="content_auto">auto</div>
</div>
<div class="container thin" id="container_thin">
<div class="content" id="content_thin">thin</div>
</div>
<div class="container none" id="container_none">
<div class="content" id="content_none">none</div>
</div>
</body>