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 ...

Developers can build applications using Sass variables and mixins, the Bootstrap grid system, and prebuilt components. Where to download Bootstrap.

Among Bootstrap's more impressive tricks is the grid layout tool, which is based on the 960 grid system, with support for advanced features like nested and offset columns.

Now comes the fun part: Styling everything with Bootstrap. [Click on image for larger view.] Figure 4. A Non-Stylized Version of the Template Site The Bootstrap Grid One of the most critical things to ...