Running JavaScript using Node.js - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is Node.js?

Node.js is a program that lets you run JavaScript code outside a web browser, usually on your computer or server.

beginner

How do you run a JavaScript file named app.js using Node.js?

Open your terminal or command prompt and type node app.js, then press Enter.

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What does the command node do when used alone in the terminal?

It opens an interactive JavaScript shell where you can type and run JavaScript commands one by one.

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Why might you want to use Node.js instead of running JavaScript in a browser?

Node.js lets you run JavaScript on your computer or server to build apps, work with files, or create servers, which browsers can't do alone.

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What is the first step to run JavaScript with Node.js after installing it?

Open your terminal or command prompt, navigate to the folder with your JavaScript file, then run node filename.js.

Which command runs a JavaScript file named script.js using Node.js?

A js run script.js

B node script.js

C run script.js

D execute script.js

The correct command to run a JavaScript file with Node.js is node filename.js.

What does Node.js allow you to do?

A Create CSS styles

B Only run JavaScript inside browsers

C Write HTML code

D Run JavaScript outside the browser

Node.js lets you run JavaScript code outside the browser, on your computer or server.

What happens if you type node alone in the terminal?

A Starts an interactive JavaScript shell

B Runs the last JavaScript file

C Shows Node.js version

D Opens a text editor

Typing node alone opens a REPL (Read-Eval-Print Loop) where you can type JavaScript commands interactively.

Before running a JavaScript file with Node.js, what should you do?

A Open terminal and go to the file's folder

B Open the file in a browser

C Restart your computer

D Install a web server

You need to open your terminal and navigate to the folder where your JavaScript file is saved before running it.

Which of these is NOT a use case for Node.js?

A Running JavaScript on a server

B Building web servers

C Styling web pages with CSS

D Working with files on your computer

Node.js does not style web pages; CSS is used for styling in browsers.

Explain how to run a JavaScript file using Node.js from start to finish.

Think about what you do in the terminal step by step.

Describe what Node.js is and why it is useful.

Imagine explaining Node.js to a friend who only knows JavaScript runs in browsers.