What Is Express JS In Node JS

Express JS is an open-source framework that helps you develop web applications with Node JS more easily. With Node JS and Express JS, you get the power of JavaScript on the server-side, too! If you want to know more about Express JS, this article explains its features and functionality in detail along with some real-world examples. You’ll also learn how to install Express JS on your computer so that you can try it out yourself!

What is Node JS?

Node.js is an open-source, cross-platform runtime environment for server-side and networking applications. It’s also used to build desktop and mobile apps using HTML5, CSS3, and JavaScript with Google Chrome’s V8 engine. Since it uses Google’s V8 engine, many of its APIs are also available in regular JavaScript programs running in Chrome. 

With Node JS you can build fast, scalable network applications easily by leveraging web technologies like HTML5 to communicate with your server-side code (written in languages like CoffeeScript). And since it runs on Google’s V8 engine rather than standard interpreters, you can use dynamic languages to quickly develop features.

Getting Started with Node.js

If you’re looking to get started with knowledgehut node js training, then look no further than its website. It has a host of resources, including a Getting Started Guide and a good overview of how to build an HTTP server. The official docs are a great place to begin learning about Express or any other part of Node.js. And once you have some experience under your belt, there are many other high-quality third-party tutorials out there that can help as well. 

For example, one such tutorial explains how to build a Reddit clone using Node.js and MongoDB. As you learn more about JavaScript (and even if you don’t), it will be worth your time to check out books like Professional JavaScript for Web Developers by Nicholas Zakas or Eloquent JavaScript by Marijn Haverbeke. You may also want to explore additional frameworks like MeteorJS, which is built on top of Node.js but adds features like real-time database synchronization without having to deal with servers directly.

Asynchronous JavaScript in Node.js

Building on top of what you know about request and response, let’s look at some other common functions in Node.js. One is setInterval() and clearInterval(). Both take two arguments: a callback function to be run and a time (in milliseconds) after which to call that function. 

So, if we want to add something like 5 seconds between every change we make to our responseText, we can just do something like setInterval(function(){ resp +=  ; }, 5000);.

Other Common Functions in Node.js

There are many other commonly used functions in Node.js, and once you become more familiar with them, it will be easy to find answers to any issues you encounter. 

These functions include a query string, redis, connect-redis, throttle-io, path (file), and fs (file system). You can also always access documentation directly within your browser by entering a command into the terminal – node -v8-options grep Documentation. This function is also very helpful when trying to find an answer to a specific question or error code.


Express JS (also called Express) is a lightweight web application framework that’s built on top of Node JS and primarily used to create single-page applications (SPAs). The framework was developed by TJ Holowaychuk and became popular when it was integrated into the MEAN stack – MongoDB, Express, AngularJS, and Node JS. Because it’s quite flexible, Express has been used in production with all kinds of databases, including Redis, RethinkDB, PostgreSQL, MySQL, and SQLite.

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