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Creating Basic Server

What is Server ?​

A server is a computer or software that shares information or services with other computers over a network. It responds to requests and provides resources like websites, databases, or files to users or other programs.

What is Port ?​

A port is a number that helps the server identify different services. It's like a door or window that allows data to enter and exit, enabling the server to isten for requests.

What is ExpressJS ?​

Express.js Fast, simple Node.js framework for building web apps and APIs by providing essential features like routing, middleware support , and template engines.

How to create basic server ?​

  1. First create a folder on your desktop.

  2. Open that folder in VS Code Editior.

  3. Then type a command in terminal npm init -y, This command initialize your project with default settings, and sets up a basic configuration for your Node.js project without asking for manual input.

  4. it will create package.json file .

  5. Replace the "test": "echo \"Error: no test specified\" && exit 1" script with "start": "node index.js". This sets the command to run when you execute npm start in your terminal. It runs the index.js file using Node.js.

  6. "module" after the "main" field to specify that your project uses ES modules, "type": "module" This indicates that your project uses ES modules for JavaScript files.

  7. Create a file with the name of index.js

  8. Now install Express, just type npm install express in your terminal and hit enter. This command downloads and installs Express for your project.

  9. Now import express form 'express" in index.js file.

  10. Using this express initialize a server or app. const app = express();

  11. Create a variable by the name of PORT const PORT = 5000

app.listen(PORT, () => {
  console.log(`Server running on ${PORT}`);
});

  1. This code start express server app listening on the specified PORT 5000

import express from "express";

const app = express();

const PORT = 5000;

app.listen(PORT, () => {
  console.log(`your server is running on port ${PORT}`);
});
danger

Common Mistakes

  2. if you get error Address already in use :​

change your port number or check is it running on another terminal .