Modern JavaScript

Modules

Modules split your code into files that export and import from each other.

// math.js
export const add = (a, b) => a + b;
export default function multiply(a, b) { return a * b; }

// app.js
import multiply, { add } from "./math.js";
console.log(add(2, 3), multiply(2, 3));

<script type="module" src="app.js"></script>