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<!DOCTYPE html>
<meta charset="utf-8">
<title>Scroll anchoring is suppressed during editing in editable elements</title>
<link rel="author" href="mailto:zhoupeng.1996@bytedance.com">
<link rel="help" href="https://drafts.csswg.org/css-scroll-anchoring-1/">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/dom/events/scrolling/scroll_support.js"></script>
<script src="/css/css-scroll-snap/support/common.js"></script>
<style>
textarea,
div {
font-size: 14px;
width: 685px;
height: 716px;
}
</style>
<body>
<script>
const baseText = 'Scroll Anchor Test of the editable element.';
const text = Array(500).fill(baseText).join(' ');
const caretOffset = 426;
const targetScrollTop = 30;
// Perform an editing operation while scroll anchoring is suppressed.
async function insertLineBreak(element) {
let scrollEndPromise = waitForScrollEndOrTimeout(element, 1000);
element.scrollTop = targetScrollTop;
await scrollEndPromise;
assert_equals(element.scrollTop, targetScrollTop);
scrollEndPromise = waitForScrollEndOrTimeout(element, 1000);
document.execCommand('insertLineBreak');
await scrollEndPromise;
assert_equals(element.scrollTop, targetScrollTop);
}
promise_test(async t => {
const textarea = document.createElement('textarea');
textarea.value = text;
document.body.appendChild(textarea);
textarea.focus();
textarea.setSelectionRange(caretOffset, caretOffset);
assert_equals(textarea.selectionStart, caretOffset);
assert_equals(textarea.selectionEnd, caretOffset);
await insertLineBreak(textarea);
textarea.remove();
}, 'Scroll anchoring is suppressed during editing in a textarea');
promise_test(async t => {
const selection = window.getSelection();
const editable = document.createElement('div');
editable.contentEditable = true;
editable.innerText = text;
document.body.appendChild(editable);
editable.focus();
const range = document.createRange();
const textNode = editable.firstChild;
assert_equals(textNode.nodeType, Node.TEXT_NODE);
range.setStart(textNode, caretOffset);
range.collapse(true);
selection.removeAllRanges();
selection.addRange(range);
assert_equals(selection.anchorOffset, caretOffset);
await insertLineBreak(document.documentElement);
editable.remove();
}, 'Scroll anchoring is suppressed during editing in a contenteditable element');
</script>
</body>
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