What's different between React js and Next.js
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React.js and Next.js are both JavaScript frameworks used for building web applications, but they have some key differences.
React.js is a JavaScript library for building user interfaces. It provides a declarative syntax for creating components and managing their state, making it easier to build complex UIs. React.js is often used in conjunction with other libraries and tools to create a complete web application.
Next.js, on the other hand, is a framework built on top of React.js. It adds functionality such as server-side rendering and static site generation, making it easier to create production-ready web applications. Next.js is designed to be highly customizable and allows developers to add their own functionality and plugins to the framework.
Here are some specific differences between React.js and Next.js:
Server-side rendering: Next.js allows for server-side rendering of React components, which can improve performance and SEO by delivering fully-rendered HTML to the client. React.js only supports client-side rendering, where the page is rendered on the client-side using JavaScript.
Routing: Next.js includes a built-in routing system that makes it easy to create dynamic, client-side routes. React.js does not include routing, although it can be added using third-party libraries.
File-based routing: Next.js uses file-based routing, where pages are defined as files in the file system. This makes it easy to create new pages and organize them in a structured way. React.js does not have a built-in file-based routing system.
Serverless functions: Next.js includes support for serverless functions, which can be used to create APIs and perform server-side operations without the need for a dedicated server. React.js does not include support for serverless functions.
In summary, React.js is a library for building user interfaces, while Next.js is a framework built on top of React.js that adds additional functionality such as server-side rendering, routing, and serverless functions. Depending on the specific needs of your project, one may be a better fit than the other.