<!doctype html> <html lang=en> <meta charset=utf-8> <title>CSS-contain test: style containment on body prevents writing-mode propagation</title> <link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net"> <meta name=flags content=""> <meta name=assert content="style containment on body prevents writing-mode propagation"> <link rel="match" href="reference/contain-body-w-m-001-ref.html"> <link rel=help href="https://drafts.csswg.org/css-contain-2/#contain-property"> <style> html::before { content: ""; width: 100px; height: 100px; background: orange; display: block; } p { writing-mode: horizontal-tb; margin: 0;} body { margin: 0; width: 200px; height: 200px; writing-mode: vertical-rl; contain: style; } </style> <p>Test passes if the orange square is in the upper-left corner.