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<!DOCTYPE html>
<link rel="help" href="https://html.spec.whatwg.org/C/#the-textarea-element-2">
<title>Test textarea width and height accounting for scrollbars, with vertical writing mode</title>
<meta name="author" title="Luke Warlow" href="mailto:lwarlow@igalia.com">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<body>
<style>textarea { writing-mode: vertical-lr }</style>
<textarea id="rows1" rows="1"></textarea>
<textarea id="rows1Hidden" rows="1" style="overflow-y: hidden"></textarea>
<textarea id="rows1Scroll" rows="1" style="overflow-y: scroll"></textarea>
<textarea id="cols3" cols="3"></textarea>
<textarea id="cols3Hidden" cols="3" style="overflow-x: hidden"></textarea>
<textarea id="cols3Scroll" cols="3" style="overflow-x: scroll"></textarea>
<div id="scrollableDiv" style="overflow:scroll"></div>
<script>
const scrollbarsHaveThickness = (scrollableDiv.offsetHeight != 0);
test(() => {
assert_equals(rows1.offsetHeight, rows1Hidden.offsetHeight);
assert_equals(rows1.offsetWidth, rows1Hidden.offsetWidth);
}, 'rows=1 doesnt include scrollbar thickness');
test(() => {
assert_equals(rows1.offsetHeight, rows1Scroll.offsetHeight);
if (scrollbarsHaveThickness) {
assert_less_than(rows1.offsetWidth, rows1Scroll.offsetWidth);
} else {
assert_equals(rows1.offsetWidth, rows1Scroll.offsetWidth);
}
}, 'rows=1 overflow scroll includes scrollbar thickness');
test(() => {
assert_equals(cols3.offsetHeight, cols3Scroll.offsetHeight);
if (scrollbarsHaveThickness) {
assert_greater_than(cols3.offsetHeight, cols3Hidden.offsetHeight);
} else {
assert_equals(cols3.offsetHeight, cols3Hidden.offsetHeight);
}
assert_equals(cols3.offsetWidth, cols3Scroll.offsetWidth);
assert_equals(cols3.offsetWidth, cols3Hidden.offsetWidth);
}, 'cols=3 includes scrollbar thickness');
</script>
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