Getting started with express

APIs are super easy to create using express app

Getting started

Create a directory

                       
cd ~
~$ mkdir testExpress
~$ cd testExpress
                       
                

Install Express. The following command will create package json with express on it. Make sure node.js is already installed

                       
~$ node --version
v6.11.3

~$ npm install express --save
                       
                

We will create server

                       
~$ vi server.js
                       
                

Insert the following code in server.js and save the file

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

app.get('/api/test', function (req, res){
	res.send({'message': 'hello'})
})

app.listen(4000);
                       
                

Running the server

                       
~$ node server.js
                       
                

You can test the API either on google chrome or on postman

After running the code, this is what you see.