ExpressJS 5 minutes to build API interface

Technology Stack

• JavaScript
• NodeJS
• Express JS
• Replit (for deployment)

Writing API

Initialize the project and install express

$ npm init -y
$ npm i express

Test Data

const products = [
    {
      name:'iPhone 13',
      color:'White',
      company:'Apple'
    },
    {
      name:'OnePlus 9',
      color:'Blue',
      company:'Oneplus'
    },
    {
      name:'iPhone 12',
      color:'Purple',
      company:'Apple'
    }
]

step:

1. Import express into the project

const express = require('express');

2. Initialize a variable to call the main express() method

const app = express();

3. Set the port

const PORT = 8080;

4. Use middleware to parse data into json

app.use(express.json());

5. Add the data object to the file

6. Complete code

const express = require('express');
const app = express();
const PORT = 8080;
app.use(express.json());

const products = [
    {
      name:'iPhone 13',
      color:'White',
      company:'Apple'
    },
    {
      name:'OnePlus 9',
      color:'Blue',
      company:'Oneplus'
    },
    {
      name:'iPhone 12',
      color:'Purple',
      company:'Apple'
    }
]

7. Start the server and listen to the specified port

const express = require('express');
const app = express();
const PORT = 8080;
app.use(express.json());

const products = [
    {
      name:'iPhone 13',
      color:'White',
      company:'Apple'
    },
    {
      name:'OnePlus 9',
      color:'Blue',
      company:'Oneplus'
    },
    {
      name:'iPhone 12',
      color:'Purple',
      company:'Apple'
    }
]

app.listen(PORT, () => console.log(`API 🟢`))

8. Create a method to handle GET requests

app.get('/products', (req, res) =>{
      res.status(200).send(products)
    })