Style-Display Grid

Bootstrap 3.2 has once again changed identification of some elements of the layout control, but the basic principles still apply. The basic framework is based on a 12 column grid system, which is then modified by one of the four width settings. The width of elements can be varied depending on the screen size, and some blocks can be enabled or disabled depending on the device screen width.

Extra small devices Phones Small devices Tablets Medium devices Desktops Large devices Desktops
<768px ≥768px ≥992px ≥1200px
-xs -sm -md -lg