mask-under-border-radius.html

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<!DOCTYPE html>

<link rel="help" href="https://www.w3.org/TR/css-masking-1/#the-mask-image">

<link rel="help" href="https://crbug.com/368562242">

<link rel="match" href="../../reference/ref-filled-green-100px-square-only.html">

<p>Test passes if there is a filled green square.</p>

<html style="overflow: hidden">

  <div style="margin: 0 -20px; overflow: hidden; border-radius: 5px">

    <div style="overflow: auto; scrollbar-width: none;

                mask-image: linear-gradient(to right, transparent 20px, red 20px 120px, transparent 120px 100%)">

      <div style="margin: -20px; height: 140px; background: green">

        <div style="position: absolute"></div>

      </div>

    </div>

  </div>

</div>