<?xml version="1.0" encoding="UTF-8"?> <!-- Any copyright is dedicated to the Public Domain. http://creativecommons.org/publicdomain/zero/1.0/ --> <!-- Reference case for absolutely positioned children of a flex container. --> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <style> div.containingBlock { top: 15px; left: 20px; height: 400px; position: absolute; border: 2px dashed purple; } .abspos { position: absolute; border: 2px dotted black; } div.flexbox { width: 200px; height: 100px; } div.a { width: 100%; height: 100px; background: lightgreen; display: inline-block; } div.b { width: 100%; height: 100px; background: yellow; display: inline-block; } div.inflex { width: 20px; height: 100px; background: gray; display: inline-block; } div.noFlexFn { width: 16px; height: 16px; background: teal; display: inline-block; } </style> </head> <body> <div class="containingBlock"> <!-- First child abspos: --> <div class="flexbox" ><div class="a abspos" style="width: 30px"/><div class="b"/></div> <!-- Second child abspos: --> <div class="flexbox" ><div class="a"/><div class="b abspos" style="width: 20px; left: 0"/></div> <!-- Middle child abspos: --> <div class="flexbox" ><div class="a" style="width: 80px" /><div class="inflex abspos" style="left: 0" /><div class="b" style="width: 120px"/></div> <!-- Third child abspos, w/ inflexible items & justify-content: space-around: --> <div class="flexbox" ><div class="inflex" style="margin-left: 15px" /><div class="inflex" style="margin-left: 30px" /><div class="inflex" style="margin-left: 30px" /><div class="noFlexFn abspos" style="left: 90px" /><div class="inflex" style="margin-left: 30px"/></div> </div> </body> </html>