Codebase Browser
chromium
Go to App

chromium/third_party/blink/web_tests/fast/forms/range/range-usecounter.html 

<!DOCTYPE html>
<link rel=author href="mailto:[email protected]">
<script src="../../../resources/testharness.js"></script>
<script src="../../../resources/testharnessreport.js"></script>

<script>
window.inputTypeRangeHorizontalLtrId = 4845;
window.inputTypeRangeHorizontalRtlId = 4846;
window.inputTypeRangeVerticalLtrId = 4847;
window.inputTypeRangeVerticalRtlId = 4848;
</script>

<input type="range">
<input type="range" style="direction: rtl">
<input type="range" style="writing-mode: vertical-lr">
<input type="range" style="direction: rtl; writing-mode: vertical-lr">

<script>
async function waitForRender() {
  return new Promise(resolve => requestAnimationFrame(resolve));
}
function assertCount(counterId) {
  assert_true(internals.isUseCounted(document, counterId), `web feature ${counterId} counted`);
  internals.clearUseCounter(document, counterId);
}
promise_test(async () => {
  await waitForRender();
  await waitForRender();

  assertCount(inputTypeRangeHorizontalLtrId);
  assertCount(inputTypeRangeHorizontalRtlId);
  assertCount(inputTypeRangeVerticalLtrId);
  assertCount(inputTypeRangeVerticalRtlId);
}, 'Usecounters for input type range are counting per writing-mode and direction');
</script>