Hari 13: Module — Import & Export

ES Modules

// math.js — EXPORT
export const PI = 3.14159;
export function tambah(a, b) { return a + b; }
export function kali(a, b)   { return a * b; }
export default class Kalkulator {
    tambah = (a, b) => a + b;
    kurang = (a, b) => a - b;
}

// app.js — IMPORT
import Kalkulator, { PI, tambah, kali } from "./math.js";
// atau import semua:
import * as Math from "./math.js";

const k = new Kalkulator();
console.log(k.tambah(3, 4));  // 7
console.log(PI);              // 3.14159
console.log(tambah(1, 2));    // 3

Dynamic Import

// Lazy loading — hanya load saat dibutuhkan
async function loadPlugin() {
    const { default: Plugin } = await import("./plugin.js");
    const plugin = new Plugin();
    plugin.init();
}

💡 Di browser gunakan <script type="module">. Di Node.js gunakan .mjs atau "type":"module" di package.json.