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NodeJS Hello World 

NodeJS Hello World 

   
   

Output:

Click on RUN button to see the output

NodeJS Online Compiler

Write, Run & Share NodeJS code online using OneCompiler's NodeJS online compiler for free. It's one of the robust, feature-rich online compilers for NodeJS language,running on the latest LTS version NodeJS 12.14.0. Getting started with the OneCompiler's NodeJS editor is easy and fast. The editor shows sample boilerplate code when you choose language as NodeJS. OneCompiler also has reference programs, where you can look for the sample code and start learning. You can provide the dependencies in package.json.

About NodeJS

Node.js is a free and open-source server environment. Node.js is very popular in recent times and a large number of companies like Microsoft, Paypal, Uber, Yahoo, General Electric and many others are using Node.js.

Key features

  • Built on Google chrome's javascript engine V8 and is pretty fast.
  • Node.js was developed by Ryan Dahl in 2009.
  • Server-side platform for building fast and scalable applications.
  • Node.js is Asynchronous, event-driven and works on single-thread model thus eliminating the dis-advantages of multi-thread model.
  • Supports various platforms like Windows, Linux, MacOS etc.
  • Provides rich library of java script modules which simplifies the development efforts.
  • Released under MIT license.

Express Framework

Express is one of the most popular web application framework in the NodeJS echosystem.

  • Pretty fast
  • Minimalist
  • Unopinionated
  • Very flexible

How to install express

npm install express

Syntax help

Hello World server example

const express = require('express');
const app = express();

app.set('port', (process.env.PORT || config.port));

app.get('/', (req, res) => res.send('Hello World!'));

app.listen(app.get('port'), () => console.log(`Server started on ${app.get('port')} port`))

Basic routing

//GET
app.get('/', function (req, res) {
  res.send('Hello World!')
})

//POST 
app.post('/', function (req, res) {
  res.send('POST request. body:', req.body)
})

//DELETE
app.delete('/:id', function (req, res) {
  res.send('DELETE request for id:'. req.params.id)
})

Help us with your feedback!

Reference Programs:

NodeJS

No tags available for NodeJS

How to use?

Choose the language in which you want to run your program, by clicking the button next to Run. And then write your code in the code box, You can use the auto complete snippets and warnings and errors which helps you to write better code faster way.
Once you are done writing your code click the Run button, now the code will be submitted to OneCompiler and you will see the results in a second.

How to contribute?

Please fork OneCompiler repository and contribute us by adding more languages or the features to the existing OneCompiler backend.
You can also contibute to the community by adding more programs which users can search and use as base code for their programs.

API & More

You can embed OneCompiler into your own website. That helps your website users to write and test their programs within your website.
If you want to run and see the results from your backend you can utilize the OneCompiler API by integrating it with your backend.