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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /dom/events/scrolling/scrollend-event-not-fired-after-removing-scroller.tentative.html - WPT Dashboard Interop Dashboard
<!DOCTYPE HTML>
<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1">
<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="scroll_support.js"></script>
<style>
#rootDiv {
width: 500px;
height: 500px;
}
#targetDiv {
width: 200px;
height: 200px;
overflow: scroll;
}
#innerDiv {
width: 500px;
height: 4000px;
}
</style>
<body style="margin:0" onload=runTest()>
</body>
<script>
let scrollend_arrived = false;
async function setupHtmlAndScrollAndRemoveElement(element_to_remove_id) {
document.body.innerHTML=`
<div id="rootDiv">
<div id="targetDiv">
<div id="innerDiv">
</div>
</div>
</div>
`;
await waitForCompositorCommit();
const target_div = document.getElementById('targetDiv');
const element_to_remove = document.getElementById(element_to_remove_id);
let reached_half_scroll = false;
scrollend_arrived = false;
target_div.addEventListener("scrollend", () => {
scrollend_arrived = true;
});
target_div.onscroll = () => {
// Remove the element after reached half of the scroll offset,
if(target_div.scrollTop >= 1000) {
reached_half_scroll = true;
element_to_remove.remove();
}
};
target_div.scrollTo({top:2000, left:0, behavior:"smooth"});
await waitFor(() => {return reached_half_scroll; },
"target_div never reached scroll offset of 1000");
await waitForCompositorCommit();
}
function runTest() {
promise_test (async (t) => {
await setupHtmlAndScrollAndRemoveElement("rootDiv");
await conditionHolds(() => { return !scrollend_arrived; });
}, "No scrollend is received after removing parent div");
promise_test (async (t) => {
await setupHtmlAndScrollAndRemoveElement("targetDiv");
await conditionHolds(() => { return !scrollend_arrived; });
}, "No scrollend is received after removing scrolling element");
promise_test (async (t) => {
await setupHtmlAndScrollAndRemoveElement("innerDiv");
await waitFor(() => { return scrollend_arrived; },
'target_div did not receive scrollend event after vertical scroll.');
}, "scrollend is received after removing descendant div");
}
</script>