css/css-ui/text-overflow-ellipsis-width-001.html

<!DOCTYPE html>
<title>Ellipsizing should not affect `offsetWidth` of inline boxes.</title>
<link rel="author" href="kojii@chromium.org">
<link rel="help" href="https://crbug.com/978392">
<link rel="help" href="https://drafts.csswg.org/css-ui-3/#ellipsing-details">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
#ellipsis {
  width: 50px;
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
}
</style>
<body>
  <div id="normal"><span>This is a test text.</span></div>
  <div id="ellipsis"><span>This is a test text.</span></div>
<script>
test(() => {
  let normal_child = normal.firstElementChild;
  let ellipsis_child = ellipsis.firstElementChild;
  assert_equals(normal_child.offsetWidth, ellipsis_child.offsetWidth);
});
</script>
</body>