<!DOCTYPE html> <meta charset="utf-8"> <title>CSS Multi-column Reference: Test a block element with box-decoration-break:clone in a zero height multi-column container</title> <link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com"> <link rel="author" title="Mozilla" href="https://www.mozilla.org/"> <style> .multicol { column-width: 100px; inline-size: 300px; block-size: 30px; } .child { color: green; inline-size: 100px; block-size: 1px; border: 5px solid green; } </style> <p>There shouldn't be a green strip in the third column.</p> <div class="multicol"> <div class="child"></div><div class="child"></div> </div>