Node.js · Theory

Web Modules

Theory

33/723

Web Modules

Web Modules is a Node.js topic. In plain words you use it for install express in a new folder. Don’t start with a slogan — start with that picture.

Smallest example: npm init + npm i express. Type it, run it, and say what you see. If you can do that from memory, you know Web Modules.

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

Trap — deleting package-lock blindly. Fix that before you talk about advanced Node.js.

Viva — what is Web Modules? Then show npm init + npm i express. Then name the trap.

Exam tip

What is Web Modules? Show this: npm init + npm i express. Trap: deleting package-lock blindly.

Example

// Web Modules
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));

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

Short notes

DefWeb Modules — install express in a new folder.
Rulenpm init + npm i express
Trapdeleting package-lock blindly
Usea new folder

Node.js · Theory

Web Modules

← All stacks

Theory

33/723

Web Modules

Web Modules is a Node.js topic. In plain words you use it for install express in a new folder. Don’t start with a slogan — start with that picture.

Smallest example: npm init + npm i express. Type it, run it, and say what you see. If you can do that from memory, you know Web Modules.

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

Trap — deleting package-lock blindly. Fix that before you talk about advanced Node.js.

Viva — what is Web Modules? Then show npm init + npm i express. Then name the trap.

Exam tip

What is Web Modules? Show this: npm init + npm i express. Trap: deleting package-lock blindly.

Example

// Web Modules
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));

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

Short notes

DefWeb Modules — install express in a new folder.
Rulenpm init + npm i express
Trapdeleting package-lock blindly
Usea new folder

Web Modules

Example

Short notes

Questions

Web Modules

Example

Short notes

Questions