| <!doctype html> | 
 | <html lang=en> | 
 |   <meta charset=utf-8> | 
 |   <title>CSS-contain test: style containment on html prevents text-orientation propagation</title> | 
 |   <link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net"> | 
 |   <meta name=flags content=""> | 
 |   <meta name=assert content="style containment on html prevents text-orientation propagation"> | 
 |   <link rel="match" href="reference/contain-body-t-o-001-ref.html"> | 
 |   <link rel=help href="https://drafts.csswg.org/css-contain-2/#contain-property"> | 
 |  | 
 | <style> | 
 | html { | 
 |     writing-mode: vertical-lr; | 
 |     direction: rtl; | 
 |     width: 100vw; | 
 |     height: 100vh; | 
 |     overflow: hidden; | 
 | } | 
 | body { | 
 |     margin: 0; | 
 |     border-top: 100px solid red; | 
 |     border-bottom: 100px solid green; | 
 |     width: 100vw; | 
 |     height: 100vh; | 
 |     text-orientation: upright; | 
 | } | 
 | html { | 
 |     contain: style; | 
 | } | 
 | p { | 
 |     margin: auto; | 
 |     padding: 150px 0; | 
 |     writing-mode: horizontal-tb; | 
 |     direction: ltr; | 
 | } | 
 | </style> | 
 |  | 
 | <p>Test passes if there is no red. |