1219985-ref-opaque-with-rendering.html

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<!DOCTYPE html>

<meta charset="utf-8">

<title>Bug 1219985: Reference for an opaque canvas with a green square rendered in it</title>

<div style="width: 200px; height: 200px; background: black; display: flex;">

  <div style="width: 100px; height: 100px; margin: auto; background: green;"></div>

</div>