<!DOCTYPE html> <title> Multi-line row flex fragmentation: nested multicols and break-inside:avoid. </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; position: relative; } #flex > div { width: 100%; background: green; } </style> <p>Test passes if there is a filled green square and <strong>no red</strong>.</p> <div style="columns: 2; column-fill: auto; column-gap: 0; width: 100px; height: 100px; background: red;"> <div style="height: 50px; background: green;"></div> <div style="columns: 5; column-fill: auto; column-gap: 0;"> <div id="flex"> <div style="position: absolute; top: 50px; height: 200px; width: 50%;"></div> <div style="height: 50px;"></div> <div style="width: 50%; height: 100px; margin-top: 50px; break-inside: avoid;"></div> <div style="width: 50%; height: 300px;"></div> <div style="height: 200px;"></div> <div style="height: 200px;"></div> </div> </div> </div>