<!DOCTYPE html> <title> Multi-line column flex fragmentation: Negative margins. </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-direction: column; flex-wrap: wrap; height: 500px; } #flex > div { height: 100px; width: 10px; } #flex > div:nth-child(odd) { background: green; margin-top: -100px; break-before: column; } </style> <p>Test passes if there is a filled green square and <strong>no red</strong>.</p> <div style="height: 100px; width: 100px; background: red; position: absolute"> <div style="position: absolute; left: 10px; width: 10px; height: 100px; background: green;"></div> <div style="margin-top: 100px; width: 100px; height: 100px; columns: 5; column-gap: 0; column-fill: auto;"> <div id="flex"> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> <div style="background: white;"></div> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> </div> </div> </div>