Importing other files

In your project you might want to split your code into multiple files.

This is a good practice to keep your code clean and easy to read.

Enable ES module imports in Node.js

Before you can use the import syntax in Node.js, you need to tell Node that your project uses ES modules. Open your package.json file and add "type": "module":

{
  "name": "my-project",
  "version": "1.0.0",
  "type": "module"
}

Without this line, Node.js will treat your files as CommonJS and throw a SyntaxError when it sees import.

Importing functions from another file

Lets make another file called utils.js and write some code.

// utils.js
export const add = (a, b) => a + b

Now we can import the add function in our index.js file.

// index.js
import { add } from './utils.js'

console.log(add(1, 2)) // 3

When you run the index.js file you should see the number 3 in your terminal.

export keyword is used to export a function or a variable from a file. and import keyword is used to import a function or a variable from another file.