jwt decode javascript code example

Example 1: js jwt decode

import jwt_decode from "jwt-decode";
var token = "eyJ0eXAiO...";
var decoded = jwt_decode(token);
console.log(decoded);

/* prints: * { foo: "bar", *   exp: 1393286893, *   iat: 1393268893  } */

Example 2: jsonwebtoken

RSASHA256(
  base64UrlEncode(header) + "." +
  base64UrlEncode(payload),
  ,
  
)

Example 3: decode jwt tokens

let b64DecodeUnicode = str =>
  decodeURIComponent(
    Array.prototype.map.call(atob(str), c =>
      '%' + ('00' + c.charCodeAt(0).toString(16)).slice(-2)
    ).join(''))

let parseJwt = token =>
  JSON.parse(
    b64DecodeUnicode(
      token.split('.')[1].replace('-', '+').replace('_', '/')
    )
  )

Example 4: jwt

JSON Web Token is an Internet standard for creating data with optional
signature and/or optional encryption whose payload holds JSON that asserts
some number of claims.

The tokens are signed either using a private secret or a public/private key.

Example 5: jwt decode

jwt.decode( token, SECRET_KEY, algorithm='HS256' )

Example 6: npm jwt decode

import jwt_decode from "jwt-decode"; var token = "eyJ0eXAiO.../// jwt token";var decoded = jwt_decode(token); console.log(decoded); /* prints: * { foo: "bar", *   exp: 1393286893, *   iat: 1393268893  } */ // decode header by passing in options (useful for when you need `kid` to verify a JWT):var decodedHeader = jwt_decode(token, { header: true });console.log(decodedHeader); /* prints: * { typ: "JWT", *   alg: "HS256" } */