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chromium/third_party/blink/web_tests/external/wpt/css/css-overflow/overflow-scroll-resize-visibility-hidden-ref.html 

<!DOCTYPE html>
<style>
.scroller {
  width: 100px;
  height: 100px;
  overflow: scroll;
  /* to make the scroller a white mask over the content */
  filter: brightness(0) invert(1);
  position: relative;
  top: -200px;
}
.content {
  width: 100px;
  height: 100px;
  background: green;
}
</style>
<div class="content"></div>
<div class="content"></div>
<div class="scroller"></div>
<div class="scroller"></div>