Save Time Referencing Bootstrap 4 Classes and Component Code Snippets.This Bootstrap reference guide book will help you find the code necessary to build common components see a list of all the CSS classes and get the color values in RGB and Hexadecimal format.Updated Supports Bootstrap 4.2.1 and Bootstrap 3.3.7This Bootstrap Reference Book Includes Introduction to Bootstrap and responsive web design Bootstrap 4 Classes and Components Reference Bootstrap 4 Flexbox Utility Classes Reference Bootstrap 4 Colors Reference Bootstrap 3 Classes and Components Reference CSS Reference Responsive Images Reference Additional Frontend Development Reference and Resource Links Canampamp39t this information be found for free on the documentation website You can find most of the information contained in this book on the internet. But I tried to distill the components and information to the most frequently used. I also provide a list of all of the class names which is not available on the official documentation site.