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Authentication and Authorization in Node.js

Theory

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Authentication and Authorization in Node.js

Authentication and Authorization (in node js) is a Node.js topic. In plain words you use it for login token in protected /admin. Don’t start with a slogan — start with that picture.

Smallest example: verify token in middleware. Type it, run it, and say what you see. If you can do that from memory, you know Authentication and Authorization (in node js).

From the example next to this theory — Authentication and Authorization in Node.

Trap — storing JWT in localStorage as the only plan. Fix that before you talk about advanced Node.js.

Viva — what is Authentication and Authorization (in node js)? Then show verify token in middleware. Then name the trap.

Exam tip

What is Authentication and Authorization (in node js)? Show this: verify token in middleware. Trap: storing JWT in localStorage as the only plan.

Example

// Authentication and Authorization in Node.js
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));

Authentication and Authorization in Node.js: find user 2, then list names. Say both prints.

Short notes

DefAuthentication and Authorization (in node js) — login token in protected /admin.
Ruleverify token in middleware
Trapstoring JWT in localStorage as the only plan
Useprotected /admin

// Authentication and Authorization in Node.js 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));

Authentication and Authorization in Node.js

Example

Short notes

Questions

Authentication and Authorization in Node.js

Example

Short notes

Questions