Decode JWT Token in React

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Tiempo de lectura: < 1 minuto

Today we are going to learn a small function to decode JWT tokens using React.

The first thing we will do is to install the necessary libraries:

JsonWebToken

npm i jsonwebtoken --save

auth0.js

npm install auth0-js --save

And the types if we are using TypeScript:

npm i --save-dev @types/auth0-js

Once installed, let’s create this function in a utils.tsx file:

export function decodeToken(token: string): any {
  // Import the `jsonwebtoken` library to decode the token
  const jwt = require("jsonwebtoken");

  // Decode the token and get the user information
  const decodedToken = jwt.decode(token, { json: true }) as any;

  // Return the user information
  return decodedToken;
}

It will decode the tokens passed as a parameter and return them in JSON format.

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