📁 Node.js – File System (fs) Module

The File System (fs) module allows you to interact with files and directories on your computer.

You can:

• Create files

• Read files

• Write files

• Update files

• Delete files

• Rename files

• Create folders

• Delete folders

fs is a built-in module → no installation required.

✅ 1. Import the fs Module

🚀 2. Read Files

A. Synchronous Read

B. Asynchronous Read (recommended)

📝 3. Write Files

A. Create or overwrite a file

✍ 4. Append Data to Files

🗑 5. Delete Files

🔄 6. Rename Files

📂 7. Create Folder / Directory

🗂 8. Read Directory Files

❌ 9. Delete Folder

Folder must be empty:

For non-empty folders (Node 16+):

🔒 10. Check File/Folder Existence

🧲 11. Copy Files

📘 12. Read and Write Streams

(Used for large files)

Read Stream:

Write Stream:

🧩 13. watch() – Monitor File Changes

🌟 14. Complete Example: Read & Write Together

🎯 Summary Table