Basic Express 101

Step-step

1. Make new folder.

mkdir 01-express-101

2. Open the folder.

cd 01-express-101

3. Make sure you have node and npm installed in your computer.

node -v
npm -v

4. Init npm for start the project.

npm init

5. For now, just press enter if you asked to fill something. If done, file package.json will appeared in your directory.

{
  "name": "01-express-101",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC"
}

6. Install the express

npm install express

7. Create new file index.js

touch index.js

8. Copy this script.

const express = require("express");

const app = express();

app.use(express.json());
app.use(express.urlencoded({ extended: true }));

app.get("/", (req, res) => {
  res.send("Hello Express");
});

app.listen(3000, () => {
  console.log("Running on localhost:3000");
});

9. Try to run the script, and open localhost:3000.

node index.js

10. Improve your script!