Node.js Introduction

JavaScript outside the browser.

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Node.js is a runtime that runs JavaScript on servers and computers, outside the browser. It is built on Chrome's V8 engine.

Why Node.js?

Use one language (JavaScript) for frontend and backend.
Non-blocking, event-driven I/O: great for APIs, chat apps and real-time services.
npm, the world's largest package registry.

Node is used by Netflix, PayPal, LinkedIn and Uber.

Key Takeaways: Node.js Introduction

Mastering Node.js Introduction helps you write clean and reliable Node.js code. Follow standard conventions, test edge cases, and keep logic simple. Try running the code example below and complete the exercises to build confidence.

Node.js Introduction Code Example

Node.js

// hello.js  →  run with:  node hello.js
console.log("Hello from Node.js!");
console.log("Node version:", process.version);

Output

Hello from Node.js!
Node version: v20.17.0

Run this example on your own computer. The "Get Started" lesson shows how to set it up.

Node.js Introduction Practice Exercises

Check what you learned in “Node.js Introduction”.

/ 2 solved

Fill in the blank

Run a JavaScript file with Node.

 app.js

✓ Correct! Not quite. Try again.

Multiple choice

Which engine does Node.js use?

V8 SpiderMonkey Zend JVM

✓ Correct! Not quite. Try again.

to save your exercise progress.

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Mark it complete to track your progress.

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Node.js Get Started

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Node.js Introduction

Why Node.js?

💡 Key Takeaways: Node.js Introduction

Node.js Introduction Code Example

Node.js Introduction Practice Exercises

Key Takeaways: Node.js Introduction