Bootstrap is a widely-used framework that provides pre-built HTML, CSS, and JavaScript components for creating responsive websites that work across different screen sizes and devices. Developers use it to speed up web development by leveraging ready-made UI elements, grid systems, and styling utilities rather than building these from scratch. It's particularly useful when you need to get a functional, mobile-friendly interface running quickly without writing extensive custom CSS.

286 open issues · last updated Jul 21, 2026