The open source Bootstrap uses JavaScript, HTML, and CSS for developing mobile-first websites. Developers can build applications using Sass variables and mixins, the Bootstrap grid system, and ...

Bootstrap v5.2.0-beta1, published May 13, ... When opting into the experimental CSS Grid layout, .container-* classes still will be compiled unless the option is set to false.

Use our powerful mobile-first flexbox grid to build layouts of all shapes and sizes thanks to a twelve column system, six default responsive tiers, Sass variables and mixins, and dozens of predefined ...

Bootstrap’s 12 column layout. Have you ever wondered why Bootstrap, the popular JavaScript framework designed to create responsive web pages, uses a 12-column grid system? After all, the entire ...

The Bootstrap Grid One of the most critical things to understand with Bootstrap is the included grid system. When first getting started, you'll want to imagine it as being a grid with 12 columns. As ...