What are Libraries in Web Development? Libraries are these days, playing an elemental role in web development. They have pre-written codes and functionalities in their composition. The best thing is that they can simplify common tasks and turn the development process laser-fast. JavaScript libraries, such as jQuery and Lodash, can make it a piece of the pie to work with DOM and handle data. On the flip side, CSS libraries like Bootstrap and Materialize CSS come up with ready-made styles and components. UI component libraries like React and Vue.js allow developers to build interactive user interfaces. On the other hand, data visualization libraries like D3.js and Chart.js are matchless when it comes to crafting compelling data-driven visualizations. Animation libraries like GSAP and Animate.css are also there for introducing dynamic motion effects. And if you talk about utility libraries like Underscore.js and Axios, they enhance code efficiency.