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chromium/third_party/blink/web_tests/external/wpt/css/css-overflow/reference/overflow-inline-block-with-opacity-ref.html 

<!DOCTYPE html>
<style>
  span { opacity: 0.99; }
  #button { display: inline-block; }
</style>
<span>
  <div id="button">hello<br>world</div>
</span>