<!DOCTYPE html> <!-- Any copyright is dedicated to the Public Domain. http://creativecommons.org/publicdomain/zero/1.0/ --> <!-- Reference case, using inline-block instead of inline-flex, and with the baseline-aligned items aligned using specific font-size / line-heights, and with unaligned children taken out of baseline-alignment using "vertical-align:top". --> <html> <head> <title>CSS Reftest Reference</title> <link rel="author" title="Daniel Holbert" href="mailto:dholbert@mozilla.com"> <meta charset="utf-8"> <style> .flexContainer { display: inline-block; background: lightblue; } .flexContainer > * { display: inline; } .smallFont { font-size: 10px; line-height: 10px; } .bigFont { font-size: 20px; line-height: 20px; } .unaligned { vertical-align: top } </style> </head> <body> a <div class="flexContainer smallFont"> <div class="smallFont">b</div ><div class="bigFont unaligned">c</div> </div> <div class="flexContainer bigFont"> <div class="bigFont">d</div ><div class="smallFont unaligned">e</div> </div> </body> </html>