Node.js · Theory

Async/Await in Node.js

Theory

632/723

Async/Await in Node.js

Async/Await (in node js) is a Node.js topic. In plain words you use it for fetch a user then marks in an API handler. Don’t start with a slogan — start with that picture.

Smallest example: async function + try/catch. Type it, run it, and say what you see. If you can do that from memory, you know Async/Await (in node js).

From the example next to this theory — Async/Await in Node.

Trap — unhandled rejection. Fix that before you talk about advanced Node.js.

Viva — what is Async/Await (in node js)? Then show async function + try/catch. Then name the trap.

Exam tip

What is Async/Await (in node js)? Show this: async function + try/catch. Trap: unhandled rejection.

Example

function wait(ms) {
  return new Promise((resolve) => setTimeout(resolve, ms));
}

(async () => {
  console.log("start");
  await wait(50);
  console.log("done");
})();

Async/Await in Node.js — async/await sits on Promises — cleaner than nested callbacks.

Short notes

DefAsync/Await (in node js) — fetch a user then marks in an API handler.
Ruleasync function + try/catch
Trapunhandled rejection
Usean API handler

Node.js · Theory

Async/Await in Node.js

← All stacks

Theory

632/723

Async/Await in Node.js

Async/Await (in node js) is a Node.js topic. In plain words you use it for fetch a user then marks in an API handler. Don’t start with a slogan — start with that picture.

Smallest example: async function + try/catch. Type it, run it, and say what you see. If you can do that from memory, you know Async/Await (in node js).

From the example next to this theory — Async/Await in Node.

Trap — unhandled rejection. Fix that before you talk about advanced Node.js.

Viva — what is Async/Await (in node js)? Then show async function + try/catch. Then name the trap.

Exam tip

What is Async/Await (in node js)? Show this: async function + try/catch. Trap: unhandled rejection.

Example

function wait(ms) {
  return new Promise((resolve) => setTimeout(resolve, ms));
}

(async () => {
  console.log("start");
  await wait(50);
  console.log("done");
})();

Async/Await in Node.js — async/await sits on Promises — cleaner than nested callbacks.

Short notes

DefAsync/Await (in node js) — fetch a user then marks in an API handler.
Ruleasync function + try/catch
Trapunhandled rejection
Usean API handler

Async/Await in Node.js

Example

Short notes

Questions

Async/Await in Node.js

Example

Short notes

Questions