<!DOCTYPE html> <meta charset="utf-8"> <title>CSS Flexbox Test: gap - horizontal with vertical RL writing mode</title> <link rel="author" title="Adam Argyle" href="mailto:argyle@google.com"> <link rel="help" href="https://www.w3.org/TR/css-grid-1/#gutters"> <link rel="help" href="https://www.w3.org/TR/css-align-3/#column-row-gap"> <link rel="help" href="https://www.w3.org/TR/css-align-3/#gap-legacy"> <link rel="match" href="gap-001-rl-ref.html"> <meta name="assert" content="The 'gap' property enables putting space exclusively between items"> <style> body { writing-mode: vertical-rl; } section { background-color: green; block-size: 100px; display: flex; gap: 20px; } section > div{ background-color: grey; flex: 1 1 auto; } </style> <body> <p>Test passes if there is <strong>a green horizontal line between boxes</strong>.</p> <section> <div></div> <div></div> <div></div> </section> </body>