Flexbox is supported in IE11, but unsupported in IE10 and lower: <a href="http:&#x2F;&#x2F;stackoverflow.com&#x2F;questions&#x2F;18019450&#x2F;css-flexbox-not-working-in-ie10" rel="nofollow">http:&#x2F;&#x2F;stackoverflow.com&#x2F;questions&#x2F;18019450&#x2F;css-flexbox-not-...</a><p>And since IE10 is EOL, it is fair to drop support for that.