What Is The Difference Between "mobile-first Responsive" And "twitter Bootstrap" On Initializr?

What is the difference between 'Mobile-first Responsive' and 'Twitter Bootstrap' on Initializr?

Solution 1:

Bootstrap is mobile-first. Mobile first basically means you design for the mobile user in mind first, and then adapt as you increase window size. So there isn't a difference between "mobile-first" and Bootstrap. The difference is between Responsive and Bootstrap because Bootstrap is a framework and Responsive is more or less a "dumbed-down" version - less bloat if you don't need a bunch of elements.