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Test Info: Warnings
- This test has a WPT meta file that expects 3 subtest issues.
- This WPT test may be referenced by the following Test IDs:
- /pointerevents/pointerevent_touch-action-overflow-hidden_touch.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<title>Pointer Events: touch-action panning is not re-enabled by overflow: hidden</title>
<meta name="timeout" content="long">
<meta name="viewport" content="width=device-width">
<link rel="help" href="https://w3c.github.io/pointerevents/#determining-supported-direct-manipulation-behavior">
<link rel="author" title="Free Debreuil" href="mailto:freedebreuil@google.com">
<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>
<script src="pointerevent_support.js"></script>
<style>
body {
margin: 0;
padding: 50px 0 0 100px;
}
.container {
width: 100px;
height: 100px;
overflow: scroll;
touch-action: none;
margin-bottom: 50px;
}
.scroller {
width: 100px;
height: 100px;
}
.hidden-y {
overflow-x: auto;
overflow-y: hidden;
}
.hidden-x {
overflow-x: hidden;
overflow-y: auto;
}
.hidden-both {
overflow: hidden;
}
.spacer {
width: 200px;
height: 200px;
}
</style>
<p>
overflow: hidden is only scrollable programmatically, so it must
not re-enable touch panning inside touch-action: none.
Therefore, blocked pans must not chain to a scrollable ancestor.
</p>
<div id="hidden-y-container" class="container">
<div id="hidden-y-target" class="scroller hidden-y">
<div class="spacer"></div>
</div>
<div class="spacer"></div>
</div>
<div id="hidden-x-container" class="container">
<div id="hidden-x-target" class="scroller hidden-x">
<div class="spacer"></div>
</div>
<div class="spacer"></div>
</div>
<div id="hidden-both-container" class="container">
<div id="hidden-both-target" class="scroller hidden-both">
<div class="spacer"></div>
</div>
<div class="spacer"></div>
</div>
<script>
promise_test(async () => {
const container = document.getElementById("hidden-y-container");
const target = document.getElementById("hidden-y-target");
await touchScrollInTarget(target, "down");
await touchScrollInTarget(target, "right");
await resolveWhen(() => target.scrollLeft > 0);
assert_equals(target.scrollTop, 0, "pan-y must not scroll the overflow: hidden axis");
assert_equals(container.scrollTop, 0, "pan-y must be blocked by touch-action: none");
}, "overflow: auto hidden re-enables touch panning only along x");
promise_test(async () => {
const container = document.getElementById("hidden-x-container");
const target = document.getElementById("hidden-x-target");
await touchScrollInTarget(target, "right");
await touchScrollInTarget(target, "down");
await resolveWhen(() => target.scrollTop > 0);
assert_equals(target.scrollLeft, 0, "pan-x must not scroll the overflow: hidden axis");
assert_equals(container.scrollLeft, 0, "pan-x must be blocked by touch-action: none");
}, "overflow: hidden auto re-enables touch panning only along y");
promise_test(async (t) => {
const container = document.getElementById("hidden-both-container");
const target = document.getElementById("hidden-both-target");
await touchScrollInTarget(target, "right");
await touchScrollInTarget(target, "down");
// Use a click on body as a barrier to ensure previous touch events are processed.
const clickPromise = getEvent("click", document.body, t);
await clickInTarget("touch", document.body);
await clickPromise;
assert_equals(target.scrollLeft, 0, "pan-x must not scroll the overflow: hidden x axis");
assert_equals(target.scrollTop, 0, "pan-y must not scroll the overflow: hidden y axis");
assert_equals(container.scrollLeft, 0, "pan-x must be blocked by touch-action: none");
assert_equals(container.scrollTop, 0, "pan-y must be blocked by touch-action: none");
}, "overflow: hidden does not re-enable touch panning along either axis");
</script>