<!DOCTYPE html>
<title>CSS Cascade Layers: 'revert-layer' chain</title>
<link rel="help" href="https://drafts.csswg.org/css-cascade-5/#revert-layer">
<link rel="author" href="mailto:xiaochengh@chromium.org">
<link rel="match" href="reference/ref-filled-green-100px-square.xht">

<style>
#target {
  width: 100px;
  height: 100px;
}

@layer {
  #target { background-color: green; }
}

@layer {
  #target {
    background-color: red;
    background-color: revert-layer;
  }
}

@layer {
  #target {
    background-color: red;
    background-color: revert-layer;
  }
}

@layer {
  #target {
    background-color: red;
    background-color: revert-layer;
  }
}
</style>

<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div id="target"></div>