|  | <!DOCTYPE html> | 
|  | <html> | 
|  | <link rel="help" href="https://drafts.csswg.org/css-tables-3/"> | 
|  | <meta name="assert" content="Table cell margins do not contribute to layout overflow."> | 
|  | <script src="/resources/testharness.js"></script> | 
|  | <script src="/resources/testharnessreport.js"></script> | 
|  | <style> | 
|  | html { | 
|  | display: table; | 
|  | width: 100%; | 
|  | height: 100%; | 
|  | } | 
|  | body { | 
|  | display: table-cell; | 
|  | width: 100%; | 
|  | } | 
|  | </style> | 
|  | <body></body> | 
|  | <script> | 
|  | test(() => { | 
|  | const scroller = document.scrollingElement; | 
|  |  | 
|  | // There shouldn't be any layout overflow on the root scrollable element. | 
|  | assert_equals(scroller.clientHeight, scroller.scrollHeight); | 
|  | }); | 
|  | </script> |