The following are 3rd party SASS libraries that we’ve included by default:
Normalize
Normalize.css makes browsers render all elements more consistently and in line with modern standards. It precisely targets only the styles that need normalizing.
Is
A small set of utility functions by Hugo Giraudel for checking types of values in SASS.
Math
A set of maths utility functions by Adam Savitzky
MQ
A Sass mixin that helps you compose media queries in an elegant way.