Why use Express.js?
Express.js is a lightweight, fast, and flexible backend framework that provides functionality to make Node.js easier and more efficient in use cases including building single page applications (SPAs), middleware applications, RestFUL APIs, accessing and serving static files, etc.
According to a study by SimilarTech, Express.js is used in over 230,000 websites. Another study by BuildWith shows that Express.js is the 9th most popular framework used by the top 10,000 sites, ahead of both Angular and Next.js.
Building scalable applications
Express.js has a speedy I/O, allowing it to respond quickly to user requests, along with its efficient request/response cycle. An MVC (Model – View – Controller) architecture enhances data manipulation and helps keep the codebase organized and maintainable, which can be important concerns for building scalable applications.
The MEAN stack
MongoDB: MongoDB is a NoSQL database that runs on a server to store data, documents, collections, etc.
Express.js: Used for creating web applications by making it easier to create request endpoints, rest APIs, cookie handling, etc.
Angular: Build frontend applications. In place of Angular, stacks like MERN and MEVN use React and Vue.js respectively.
Fast, flexible, and extensible
Express.js provides a robust feature set and is easy to get started with, despite being a very lightweight and flexible framework. Through extensive features for building middleware, routing, and templating, Express.js offer speedy development. Much of Express’s flexibility comes from being unopinionated – meaning that you aren’t forced into specific styles and set rules for writing code and building applications.
“Express.js provides a robust feature set and is easy to get started with, despite being a very lightweight and flexible framework.”
Extensibility is another strength of Express.js; whereby third-party modules and libraries offer powerful ways to extend Express’s capabilities and functionality. These libraries are constantly growing and evolving thanks to a large, dynamic, and active Express community.
Large and active community
As the largest Node.js framework, Express.js has a large and active community contributing a variety of extensions, middleware modules, libraries, and more. Express.js is open-sourced, meaning developers can extend its functionality using existing modules and libraries, and use reference in-depth guides on routing, middleware, best practices, etc.