Writing files in Node.js - Mini Project: Build & Apply

Writing Files with Node.js

📖 Scenario: You are building a simple Node.js script to save user notes to a text file on your computer.This is useful for keeping records or logs in many real-world applications.

🎯 Goal: Learn how to write text data to a file using Node.js built-in fs module.You will create a file and write some content into it step-by-step.

📋 What You'll Learn

Use Node.js fs module to write files

Create a string variable with note content

Use fs.writeFileSync to write the content to a file

Name the file note.txt

💡 Why This Matters

🌍 Real World

Writing files is common for saving logs, user data, or configuration in many Node.js applications.

💼 Career

Knowing how to handle file operations is essential for backend developers and automation scripts.

1

Import the fs module

Write a line to import the Node.js fs module using import fs from 'fs';

Node.js

// Your code here

Need a hint?

Use ES module syntax to import fs like this: import fs from 'fs';

2

Create a string variable with note content

Create a variable called noteContent and set it to the string 'This is my first note.'

Node.js

import fs from 'fs';
// Your code here

Need a hint?

Use const to create the variable and assign the exact string.

3

Write the note content to a file

Use fs.writeFileSync to write the content of noteContent to a file named 'note.txt'

Node.js

import fs from 'fs';
const noteContent = 'This is my first note.';
// Your code here

Need a hint?

Call fs.writeFileSync with the filename and the string variable as arguments.

4

Add a confirmation message

Add a line to log 'Note saved successfully!' to the console using console.log

Node.js

import fs from 'fs';
const noteContent = 'This is my first note.';
fs.writeFileSync('note.txt', noteContent);
// Your code here

Need a hint?

Use console.log to show a success message after writing the file.