Bootstrap.js: does it contain javascript already or do I need to install it like I ussualy do? If I do what bootstrap.js actually contain then?
I put this in class col-xs-6 when I want to make some element 50% weight of screen, right? What is used for height then? And I put that in class, correct? For example ?
3.How can I edit some element that comes with bootstrap? For example when you putting button with "btn" bootstrap class should I make some class for it or I should edit it directly from bootstrap.css?
Is weight of one grid aproximetly 8,33% size of screen?
Is grid(col-xs-12) used for height always to make responsive design or sometimes I should use weight:100% for example?