css/css-content/element-replacement-display-none.html

<!doctype html>
<title>The content CSS property doesn't override display: none</title>
<link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez">
<link rel="match" href="../reference/blank.html">
<link rel="help" href="https://drafts.csswg.org/css-content-3/#content-property">
<style>
  div {
    display: none;
    content: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAIAAAD8GO2jAAAAKElEQVR42u3NQQ0AAAgEoNP+nTWFDzcoQE1udQQCgUAgEAgEAsGTYAGjxAE/G/Q2tQAAAABJRU5ErkJggg==);
  }
</style>
<div>FAIL</div>