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Test Info:

<!DOCTYPE html>
<title>When content CSS attribute can replace a document's root, the HTML body element's background does not become the canvas background</title>
<link rel="match" href="element-replacement-root-ref.html" />
<meta name="assert" content="When the content CSS attribute replaces a document's root, its contents do not create boxes, so the HTML body element's background can't affect the canvas background." />
<style>
:root {
content: url('resources/rect.svg');
}
body {
background-color: aquamarine;
}
</style>
<p>This text should not be visible</p>