Assesses knowledge of modern JavaScript's approach to code organization and reusability.
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Understand the problem
moduleses modulescode organizationreusability
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Attempt it yourself
Sketch your approach before reading the solution — that's what interviews test.
Stuck? AI Nudge Available
Get a conceptual hint to guide your logic without spoiling the final implementation.
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Study the solution
The solution is waiting
Give it an honest attempt first — then compare your thinking with the full walkthrough.
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Read the code
named, default, and dynamic import
// math.js — named + default exports
export const add = (a, b) => a + b;
export const PI = 3.14159;
export default function multiply(a, b) { return a * b; }
// app.js — import them
import multiply, { add, PI } from "./math.js";
console.log(add(2, 3), PI, multiply(2, 4)); // 5 3.14159 8
// rename + namespace import
import { add as sum } from "./math.js";
import * as math from "./math.js";
// dynamic import for lazy code-splitting (returns a promise)
const { add: lazyAdd } = await import("./math.js");05
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