Node.js Cheat Sheet

Core Node.js modules, NPM commands, and Express basics.

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NPM Basics File System OS Module
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NPM Basics

Concept / Tag Code Snippet Description
Init Project 
npm init -y
 Start new node project.
Install Pkg 
npm install name --save
 Add dependency.
Run Script 
npm run script-name
 Execute package.json scripts.

File System

Concept / Tag Code Snippet Description
Read File 
fs.readFile("path", "utf8", callback);
 Asynchronous file reading.
Write File 
fs.writeFileSync(path, data);
 Synchronous file writing.

OS Module

Concept / Tag Code Snippet Description
Memory Info 
os.totalmem() | os.freemem()
 Check system memory.

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