Bootstrap (formerly Twitter Bootstrap) is a free and open-source CSS framework directed at responsive, mobile-first front-end web development. It contains HTML, CSS and (optionally) JavaScript-based design templates for typography, forms, buttons, navigation, and other interface components.Bootstrap is an HTML, CSS and JS library that focuses on simplifying the development of informative web pages (as opposed to web applications). The primary purpose of adding it to a web project is to apply Bootstrap's choices of color, size, font and layout to that project. As such, the primary factor is whether the developers in charge find those choices to their liking. Once added to a project, Bootstrap provides basic style definitions for all HTML elements.
Bootstrap’s grid system is based on the concept of “flexbox”, which is a new CSS layout model that makes it easy to create responsive layouts. The grid system divides the screen into 12 columns, which can be resized and rearranged to fit the needs of any screen size. This makes it possible to create websites that look good on all devices, from mobile phones to desktop computers.
Bootstrap is designed with Mobile Application in mind. The grid system is optimized for mobile browsers, and Bootstrap includes a number of components that are specifically designed for mobile devices, such as a mobile navigation bar and a mobile dropdown menu. This makes it easy to create websites that are both responsive and mobile-friendly.
Bootstrap is highly customizable. You can change the colors, fonts, and other aspects of the framework to match your own branding. Bootstrap also includes a number of plugins that you can use to add additional functionality to your website development . This makes it possible to create websites that are unique and look exactly the way you want them to.
Bootstrap is lightweight and fast. It doesn’t add a lot of bloat to your website, which can help to improve its loading speed. This is important for both the user experience and SEOBootstrap’s front-end framework relies heavily on the grid system within the technology, packed with features to help developers structure a responsive layout.