
As of my last knowledge update in January 2022, several JavaScript frameworks were popular in web development. However, keep in mind that the landscape can change rapidly, and new frameworks may have emerged since then. Here are some of the JavaScript frameworks that were prominent at that time:

React.js: Developed and maintained by Facebook, React.js is widely used for building user interfaces, especially for single-page applications where components can be reused to manage complex UIs efficiently.

Vue.js: Vue.js is a progressive JavaScript framework that is approachable and easy to integrate. It’s known for its simplicity and flexibility, making it a good choice for both small and large-scale applications.

Angular (Angular 2+): Developed and maintained by Google, Angular is a comprehensive framework for building dynamic, single-page web applications. It uses TypeScript and follows the component-based architecture.

Svelte: Svelte is a relatively new framework that shifts some of the work from the browser to the build step. It aims to generate highly optimized, imperative code that directly manipulates the DOM during runtime.

Node.js (not a traditional frontend framework): While not a traditional frontend framework, Node.js is worth mentioning for its significance in enabling server-side JavaScript. It’s commonly used for building scalable and high-performance server-side applications.
Please check the latest resources, community discussions, and documentation to get the most up-to-date information on JavaScript frameworks. The popularity and usage of frameworks can evolve quickly in the rapidly changing field of web development.