|  | <!DOCTYPE html> | 
|  | <html> | 
|  | <head> | 
|  | <meta charset="utf-8"> | 
|  | <title>CSS Multi-column Layout: parsing column-rule-width with invalid values</title> | 
|  | <link rel="help" href="https://drafts.csswg.org/css-multicol/#propdef-column-rule-width"> | 
|  | <meta name="assert" content="column-rule-width supports only the <line-width> grammar '<length> | thin | medium | thick'."> | 
|  | <meta name="assert" content="column-rule-width rejects negative lengths."> | 
|  | <script src="/resources/testharness.js"></script> | 
|  | <script src="/resources/testharnessreport.js"></script> | 
|  | <script src="/css/support/parsing-testcommon.js"></script> | 
|  | </head> | 
|  | <body> | 
|  | <script> | 
|  | test_invalid_value("column-rule-width", "auto"); | 
|  |  | 
|  | test_invalid_value("column-rule-width", "10"); | 
|  | test_invalid_value("column-rule-width", "-20px"); | 
|  | test_invalid_value("column-rule-width", "30%"); | 
|  |  | 
|  | </script> | 
|  | </body> | 
|  | </html> |