Build fast, responsive sites with Bootstrap , a powerful HTML, CSS, and JS toolkit featuring Sass customization, prebuilt grid system, and JavaScript plugins. Bootstrap is a popular open-source front-end framework designed for developing responsive, mobile-first websites and web applications. It provides a collection of HTML, CSS, and JavaScript components that simplify the process of creating modern and responsive designs, making it easier for developers of all skill levels to build good-looking and functional web applications quickly. What is Bootstrap Key Features of Bootstrap Responsive Design: Bootstrap is built on a mobile-first approach ... What is Bootstrap ? Bootstrap is a free, open source front-end development framework for the creation of websites and web apps. Designed to enable responsive development of mobile-first websites, Bootstrap provides a collection of syntax for template designs. As a framework, Bootstrap includes the basics for responsive web development, so developers only need to insert the code into a pre-defined grid system. The Bootstrap framework is built on Hypertext Markup Language (HTML), cascading ... Learn how to get started with Bootstrap using W3Schools' easy-to-follow tutorials and examples for building responsive, mobile-first web projects.