<!doctype HTML>
<meta charset="utf-8">
<title>backdrop-filter: no effect on the root element</title>
<link rel="author" title="Chris Harrelson" href="mailto:chrishtr@chromium.org">
<link rel="help" href="https://drafts.fxtf.org/filter-effects-2/#BackdropFilterProperty">
<style>
  html {
    background: green;
  }
</style>
Test
