<!DOCTYPE html> <title> Simple single-line row flex fragmentation. </title> <link rel="help" href="https://drafts.csswg.org/css-flexbox-1/#pagination"> <link rel="match" href="../../reference/ref-filled-green-100px-square.xht"> <style> .multicol { background: red; column-count: 5; column-fill:auto; column-gap: 0px; height: 100px; width: 100px; } .flex { display: flex; height: 500px; width: 20px; } .flex > div { background: green; height: 500px; width: 10px; } </style> <p>Test passes if there is a filled green square and <strong>no red</strong>.</p> <div class="multicol"> <div class="flex"> <div></div> <div></div> </div> </div>