|  | <!DOCTYPE html> | 
|  | <html> | 
|  | <head> | 
|  | <meta charset="utf-8"> | 
|  | <title>CSS Masking Module Level 1: getComputedStyle().clip</title> | 
|  | <link rel="help" href="https://drafts.fxtf.org/css-masking-1/#clip-property"> | 
|  | <meta name="assert" content="clip computed value is as specified, with lengths made absolute."> | 
|  | <script src="/resources/testharness.js"></script> | 
|  | <script src="/resources/testharnessreport.js"></script> | 
|  | <script src="/css/support/computed-testcommon.js"></script> | 
|  | <style> | 
|  | #target { | 
|  | font-size: 40px; | 
|  | } | 
|  | </style> | 
|  | </head> | 
|  | <body> | 
|  | <div id="target"></div> | 
|  | <script> | 
|  | test_computed_value("clip", "auto"); | 
|  | test_computed_value("clip", "rect(10px, 20px, -30px, 40px)"); | 
|  | test_computed_value("clip", "rect(10px, 20px, calc(-1em + 10px), 1em)", "rect(10px, 20px, -30px, 40px)"); | 
|  | test_computed_value("clip", "rect(10px, -20px, auto, auto)"); | 
|  | </script> | 
|  | </body> | 
|  | </html> |