What is Express.js?
Express.js is a lightweight, unopinionated, and highly flexible node.js web application framework that provides a robust set of features for web and mobile applications. It facilitates the rapid development of Node based web applications.
Key Features of Express.js
- Middleware: Express.js uses middleware modules that can perform extra tasks on request and response.
- Routing: It provides a simple way to route different requests to different handlers.
- Templates: Express.js supports a wide range of template engines for generating documents from your data.
- Error Handling: It comes with built-in error handling mechanism.
Why Use Express.js?
Express.js is a popular choice among web developers due to its simplicity, speed, and minimalism. It is easy to configure and customize, and it provides a simple way to define routes of your application. It also supports many middleware, which can be used to extra work on request and response.
How to Get Started with Express.js?
To get started with Express.js, you need to have Node.js and npm (node package manager) installed in your system. Once you have these installations, you can install Express.js using the following command:
npm install express --save
Then, you can include express in your application as follows:
var express = require('express');
var app = express();
Express.js is a powerful tool for web application development. It provides a simple and flexible layer built on top of Node.js, allowing developers to build single-page, multi-page, and hybrid web applications with ease. Its robust API allows users to configure routes, inputs, outputs, and other server-side functionalities. If you’re looking to build fast, scalable web applications, Express.js is a great choice.