Node.js · Theory

NestJS

Theory

34/723

NestJS

NestJS is a Node.js topic. In plain words you use it for a short NestJS example in a script or API on localhost. Don’t start with a slogan — start with that picture.

Smallest example: the smallest NestJS example you can type. Type it, run it, and say what you see. If you can do that from memory, you know NestJS.

From the example next to this theory — NestJS: find user 2, then list names.

Trap — only saying “NestJS” with no example. Fix that before you talk about advanced Node.js.

Viva — what is NestJS? Then show the smallest NestJS example you can type. Then name the trap.

Exam tip

What is NestJS? Show this: the smallest NestJS example you can type. Trap: only saying “NestJS” with no example.

Example

// NestJS
const users = [
  { id: 1, name: "Asha" },
  { id: 2, name: "Ravi" },
];

function findUser(id) {
  return users.find((u) => u.id === id) ?? null;
}

console.log(findUser(2));
console.log(users.map((u) => u.name));

NestJS: find user 2, then list names. Say both prints.

Short notes

DefNestJS — a short NestJS example in a script or API on localhost.
Rulethe smallest NestJS example you can type
Traponly saying “NestJS” with no example
Usea script or API on localhost

Node.js · Theory

NestJS

← All stacks

Theory

34/723

NestJS

NestJS is a Node.js topic. In plain words you use it for a short NestJS example in a script or API on localhost. Don’t start with a slogan — start with that picture.

Smallest example: the smallest NestJS example you can type. Type it, run it, and say what you see. If you can do that from memory, you know NestJS.

From the example next to this theory — NestJS: find user 2, then list names.

Trap — only saying “NestJS” with no example. Fix that before you talk about advanced Node.js.

Viva — what is NestJS? Then show the smallest NestJS example you can type. Then name the trap.

Exam tip

What is NestJS? Show this: the smallest NestJS example you can type. Trap: only saying “NestJS” with no example.

Example

// NestJS
const users = [
  { id: 1, name: "Asha" },
  { id: 2, name: "Ravi" },
];

function findUser(id) {
  return users.find((u) => u.id === id) ?? null;
}

console.log(findUser(2));
console.log(users.map((u) => u.name));

NestJS: find user 2, then list names. Say both prints.

Short notes

DefNestJS — a short NestJS example in a script or API on localhost.
Rulethe smallest NestJS example you can type
Traponly saying “NestJS” with no example
Usea script or API on localhost

NestJS

Example

Short notes

Questions

NestJS

Example

Short notes

Questions