ES Modules (import/export) — JS Technical Interview Questions & Answers

Splitting code across files with the module system.

ES Modules (import/export)

  • ES Modules (import/export) (js) is a JS topic. In plain words you use it for a short ES Modules import/export js example in a script in the browser. Don’t start with a slogan — start with that picture.
  • Smallest example: the smallest ES Modules import/export js example you can type. Type it, run it, and say what you see. If you can do that from memory, you know ES Modules (import/export) (js).
  • From the example next to this theory: Splitting code across files with the module system.
  • Trap: only saying “ES Modules import/export js” with no example. Fix that before you talk about advanced JS.
  • Viva: what is ES Modules (import/export) (js)? Then show the smallest ES Modules import/export js example you can type. Then name the trap.

Technical Interview Tip: What is ES Modules (import/export) (js)? Show this: the smallest ES Modules import/export js example you can type. Trap: only saying “ES Modules import/export js” with no example.

Code Examples for ES Modules (import/export)

ES Modules (import/export) — working example

// ES module style (bundlers / type=module):
// import { add } from "./math.js";
// export function add(a, b) { return a + b; }

async function loadUser() {
  // Runnable stand-in without network:
  const data = JSON.parse('{"name":"Ada"}');
  return data.name;
}

loadUser().then(console.log);

ES Modules (import/export) — eS modules use import/export; fetch loads network JSON — here we simulate parse for the lab.

How to Explain ES Modules (import/export) to an Interviewer

What is ES Modules (import/export) (js)?

Used for a short ES Modules import/export js example a script in the browser Not just the heading

Give one small example of ES Modules (import/export) (js).

the smallest ES Modules import/export js example you can type Splitting code across files with the module system

What mistake do beginners make with ES Modules (import/export) (js)?

only saying “ES Modules import/export js” with no example Show the fix

Where do you use ES Modules (import/export) (js)?

a script in the browser a short ES Modules import/export js example