HTML provides the structure, content and layout, CSS adds style and design, and JavaScript adds functionality and interactivity.

6. Bundle Plugin: Bootstrap provides some JavaScript plugin. If we need functionalities like sliders, dropdowns, carousel etc., then just add few lines of JS code and all done on the website.

Major upgrade to popular web framework introduces CSS variables for all components and improves helpers and utilities for fonts and colors.

Color libraries and an integrated development environment for Bootstrap will make engineering your Web content a whole lot easier.