The article discusses 21 JavaScript and CSS libraries that can make web development easier in 2024. These libraries reduce time complexity, enhance functionality for better user experience, and minify code size to improve performance. Some of the top libraries mentioned are Algolia, Wired Elements, Micron.js, Flat-Remix.CSS, React Spring, SimpleBar, Apex Charts, Anime.JS, Embetty, Hybrids, Animate on Scroll, Bideo.JS, Chart.JS, Cleave.JS, Smooth UI, Curtains.JS, Math.JS, X-Chart, Box-shadows.css, D3.JS, and Multiple.JS. These libraries offer various functionalities such as autocomplete features, hand-drawn UI elements, animations, data visualization, and more. The article also recommends using LambdaTest for cross-browser compatibility testing to ensure a seamless user experience across different browsers and devices.