What is JWT authentication in TypeScript?

What is JWT authentication in TypeScript?

JWT (JSON Web Token) authentication is a method for securely transmitting information between parties as a JSON object. In TypeScript, it allows you to implement authentication in a type-safe manner.

How do I implement JWT authentication in a TypeScript application?

To implement JWT authentication, you typically need to set up a server that issues tokens upon user login, and then validate those tokens on subsequent requests.

What libraries can I use for JWT in TypeScript?

You can use libraries like jsonwebtoken for creating and verifying tokens, and express-jwt for middleware in Express applications.

Can you show me a code example?

Sure! Here's a simple example:

import jwt from 'jsonwebtoken';

const token = jwt.sign({ userId: 123 }, 'your_secret_key');
console.log(token);