Built-in modules overview in Node.js - Mini Project: Build & Apply

Built-in Modules Overview in Node.js

📖 Scenario: You are creating a simple Node.js script to explore some common built-in modules. This will help you understand how to use Node.js features without installing extra packages.

🎯 Goal: Build a Node.js script that imports the fs and path modules, reads the current directory files, and prints their names with their extensions.

📋 What You'll Learn

Import the built-in fs module

Import the built-in path module

Read the list of files in the current directory

Use path.extname to get each file's extension

Print each file name with its extension

💡 Why This Matters

🌍 Real World

Node.js built-in modules let you work with files, paths, and system info without extra installs. This is useful for scripts, servers, and tools.

💼 Career

Understanding built-in modules is essential for Node.js developers to build efficient and maintainable applications.

1

Import the fs module

Write a line to import the built-in Node.js module fs using import fs from 'fs'.

Node.js

# Your code here

Need a hint?

Use the ES module syntax: import fs from 'fs'.

2

Import the path module

Add a line to import the built-in Node.js module path using import path from 'path'.

Node.js

import fs from 'fs'
# Your code here

Need a hint?

Use the ES module syntax: import path from 'path'.

3

Read the current directory files

Write a line to read the list of files in the current directory using fs.readdirSync and store it in a variable called files.

Node.js

import fs from 'fs'
import path from 'path'
# Your code here

Need a hint?

Use fs.readdirSync('.') to get files in the current folder.

4

Print each file name with its extension

Write a for...of loop to go through files. Inside the loop, use path.extname(file) to get the extension and print the file name and extension using console.log.

Node.js

import fs from 'fs'
import path from 'path'
const files = fs.readdirSync('.')
# Your code here

Need a hint?

Use a for...of loop and path.extname to get extensions.