<!DOCTYPE html> <title> Multi-line row flex fragmentation: break-before:avoid and column balancing. </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> #flex { display: flex; flex-wrap: wrap; } #flex > div { width: 50px; } </style> <p>Test passes if there is a filled green square and <strong>no red</strong>.</p> <div style="width:100px; height:100px; background:red;"> <div style="width: 100px; columns: 2; column-gap: 0;position: relative; background: green;"> <div id="flex"> <div style="height: 25px;"></div> <div style="height: 50px; break-before:avoid;"></div> <div style="height: 5px; width: 25px;"></div> <div style="height: 25px; width: 25px; break-before: avoid;"></div> <div style="height: 50px;"></div> </div> </div> </div> </div>