Cannot replace `em` or `rem` with `px`

[TomSaporitoXO]

I really think that you should add an alternative field to specify the unit for widths:
containerUnits: 'px'
And allow the xs md etc properties to accept pixels

[LoicMahieu]

Hi @TomSaporitoXO
Thanks for your first issue ever on Github ;)

Yep... maybe. But rem and em are well supported by modern browsers: https://caniuse.com/#feat=rem

I suggest you try to implement it and submit a pull request. We'll be able to discuss about that.

[windmaomao]

My main issue with it is how to do with percentage. For example, if i happen to have a padding in one div, then all the number in rem seems just stop working properly.