<!DOCTYPE html> <title> Multi-line column flex fragmentation with break-before: 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> .multicol { column-count: 5; column-fill: auto; column-gap: 0px; height: 100px; width: 100px; position: relative; background: red; } .abs { position: absolute; width: 5px; background: green; } #flex { display: flex; flex-direction: column; flex-wrap: wrap; height: 500px; } #flex > div { background: green; width: 5px; } </style> <p>Test passes if there is a filled green square and <strong>no red</strong>.</p> <div class="multicol"> <div class="abs" style="top: 50px; height: 50px;"></div> <div class="abs" style="top: 50px; left: 25px; height: 50px;"></div> <div id="flex"> <div style="height: 50px;"></div> <div style="height: 50px;"></div> <div style="height: 350px; break-before: avoid;"></div> <div style="height: 100px;"></div> <div style="height: 50px;"></div> <div style="height: 50px;"></div> <div style="height: 250px; break-before: avoid;"></div> <div style="height: 400px;"></div> <div style="height: 100px; break-before: avoid;"></div> <div style="height: 500px;"></div> </div> </div>