<!doctype html> <html lang=en> <meta charset=utf-8> <title>CSS-contain test: paint containment on ruby-base-container</title> <link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net"> <meta name=flags content=""> <meta name=assert content="paint containment does not apply to ruby-base-container"> <link rel="match" href="../reference/pass_if_pass_below.html"> <link rel=help href="https://drafts.csswg.org/css-contain-1/#containment-paint"> <style> rbc { contain: paint; display: ruby-base-container; width: 0; /* Because if the test fails, this may get blockified, and which could make wide enough to hold the PASS */ } rbc::after { content: "PASS"; position: absolute; } </style> <p>Test passes if there is the word "PASS" below.</p> <div><ruby><rbc></rbc></ruby></div>