What are Node.js modules and how do I use them?

What are Node.js modules and how do I use them?

Node.js modules are reusable blocks of code that can be included in your application. They help organize code and manage dependencies.

How do I create my own module?

To create your own module, you can create a new JavaScript file, define your functions or variables, and then export them using module.exports.

Can you show me an example of a simple module?

Sure! Here's a simple example:

// myModule.js
function greet(name) {
    return `Hello, ${name}!`;
}
module.exports = greet;

You can then import it in another file using const greet = require('./myModule');.

What are some built-in Node.js modules I should know about?

Some essential built-in modules include fs for file system operations, http for creating servers, and path for handling file paths.