This lib will only work on the latest browsers.

The source leverages calc for simple width percentages, so on android browser below 47 these values won't calculate at all: http://caniuse.com/#feat=calc.

> Partial support in Android Browser 4.4 refers to the browser lacking the ability to multiply and divide values.

Why wouldn't the author change this to:

.Cell.\-1of12 { width: calc(100% * 3 / 12); }

to

.Cell.\-1of12 { width: 25% ; }

It seems silly to go through the trouble of installing a lib when it gives you less browser support than flexbox itself.