<!DOCTYPE html> <link rel="author" title="David Grogan" href="mailto:dgrogan@chromium.org"> <link rel="help" href="https://drafts.csswg.org/css-align-3/#overflow-values"> <link rel="match" href="../reference/ref-filled-green-100px-square.xht"> <meta name="assert" content="align-self:safe has no effect on -webkit-box" /> <style> #reference-overlapped-red { position: absolute; background-color: red; width: 100px; height: 100px; z-index: -1; } .flex { display: -webkit-box; -webkit-box-align: end; width: 90px; height: 90px; /* Make the green square cover the red square. */ translate: 0 10px; } .item { min-width: 100px; min-height: 100px; background: green; align-self: safe center; } </style> <p>Test passes if there is a filled green square and <strong>no red</strong>. </p> <div id="reference-overlapped-red"></div> <div class="flex"> <div class="item"></div> </div>