html/rendering/widgets/text-control-client-width.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>text control with `display: inline` must not have 0 client width</title>
<link rel="help" href="https://html.spec.whatwg.org/multipage/rendering.html#form-controls">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<input id="input" style="display: inline;">
<textarea id="textarea" style="display: inline;"></textarea>

<script>
test(() => {
  assert_greater_than(document.querySelector("#input").clientWidth, 0);
}, "Input with `display: inline` should have positive client width");

test(() => {
  assert_greater_than(document.querySelector("#textarea").clientWidth, 0);
}, "Textarea with `display: inline` should have positive client width");
</script>