Unraveling the Token Puzzle: Deciphering Tokens in Angular

Looking to decode a token, but proceeding with caution.

npm install jwt-decode --save

In my component.ts file:

import * as jwt_decode from 'jwt-decode';
.
.
.
console.log("Yes");
localStorage.setItem('token', res.token);
this.flagProgressBar = false;
console.log('res.token: ');
console.log(res.token);        
console.log('localStorage token:');
console.log(localStorage.getItem('token'));
const tokene = res.token;
const decoded = jwt_decode(tokene);
console.log(tokene);
console.log(decoded);

Console output:

Yes
res.token: 
eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJodHRwOi8vc2NoRW1hcy5taWNyb3NvZnQuY29tL3dzLzIwMgvMDYvaWRlbnRpdHkvY2xhaW1zL3JvbGUiOiJGdWxsQWRtaW4iLCJleHAiOjE2MDM5MjEzNzMsImlzcyI6Imh0dHBzOi8vbG9jYWxob3N0OjQ0MzU0In0.-e7cYAgQQVTcHlPrw1sWn6IsjhVPfjlItx9XGIn3S9w

localStorage token: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJodHRwOi8vc2NoEW1hcy5WNyNTaWNyb3NvZnQuY-29tL3dzLzIwMDgvMDYvaWRlbnRpdHkvY2xhaW1zL3JvbGUiOiJGdWxsQWRtaW4iLCJleHAiOjE2MDM5MjEzNzMsImlzcyI6Imh0dHBzOi8throughlyResolved42tWax&joinserePowerPathProgram=pass--RegressionOfALodieCatergologicalasjaskedAwskesffo.-Ahdboxscorsoriiterirbiwe.

ERROR: TypeError - jwt_decode__WEBPACK_IMPORTED_MODULE_2__ is not recognized as a function
at SafeSubscriber.Service.postDataLogin.subscribe.flagProgressBar [as _next]

Can you pinpoint where the issue lies?

Answer №1

If you're working with version 3 or higher:

To properly import jwt_decode, use this syntax:

import jwt_decode from 'jwt-decode';

Answer №2

Steps for successfully decoding JWT in your application:

  1. Start by installing the required package from this link: https://github.com/auth0/jwt-decode#readme
  2. Next, import the dependency into your service using the following code: import * as jwt_decode from 'jwt-decode';
  3. Use the sample code below to decode a valid JWT token:
// Use a valid JWT token;
var token = 'eyJ0eXAiO...';
var decoded = jwt_decode(token); 
console.log(decoded);

If you encounter an error, it is likely due to issues with steps 1 and 2 not being completed correctly.

Answer №3

Intended for previous editions

import * as jwt_decode from "jwt-decode";

In case of more recent versions (3 and higher):

import jwt_decode from 'jwt-decode';

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