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<!DOCTYPE html>
<meta charset="UTF-8">
<title>CSS Background and Borders Test: invalid box-shadow declarations</title>
<!--
Created: May 20th 2023
Last modified: May 20th 2023
-->
<link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">
<link rel="help" href="https://www.w3.org/TR/css-backgrounds-3/#box-shadow">
<link rel="match" href="reference/ref-filled-green-100px-square.xht">
<meta content="This test checks that 'box-shadow' accepts either the 'none' value or (exclusive or) a comma-separated list of shadows but not both at the same time." name="assert">
<meta content="invalid" name="flags">
<!--
<shadow> = <color>? && [<length>{2} <length [0,∞]>? <length>?] && inset?
The box-shadow property attaches one or more drop-shadows to
the box. The property accepts either the none value, which
indicates no shadows, or a comma-separated list of shadows,
ordered front to back.
-->
<style>
div
{
background-color: red;
box-shadow: green 100px 100px inset;
/*
This inset 'box-shadow' declaration will paint and cover
the inside of the red square. This way, we verify that
the UA actually supports 'box-shadow'.
*/
box-shadow: none, red 0px -100px, red 100px 0px, red 0px 100px, red -100px 0px; /* invalid */
box-shadow: red 0px -100px, none, red 100px 0px, red 0px 100px, red -100px 0px; /* invalid */
box-shadow: red 0px -100px, red 100px 0px, none, red 0px 100px, red -100px 0px; /* invalid */
box-shadow: red 0px -100px, red 100px 0px, red 0px 100px, none, red -100px 0px; /* invalid */
box-shadow: red 0px -100px, red 100px 0px, red 0px 100px, red -100px 0px, none; /* invalid */
height: 100px;
width: 100px;
}
</style>
<p>Test passes if there is a filled green square and <strong>no red</strong>.
<div></div>
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