Decode Jwt token React

Question

I use jsonwebtoken to decode my Token to see if it has expired or not. But, the console.log return null.

 var token = response.headers.authorization;
 token = token.replace('Bearer','');
 var jwt = require('jsonwebtoken');
 var decoded = jwt.decode(token);
 console.log(decoded);

I'm don't understand because my token is not null

Answer 1

It seems like you are using JWT. To decode this type of token you can simply use jwt-decode library. For example, in ReactJS:

import { jwtDecode } from 'jwt-decode' // import dependency
// If using v3 or earlier, use this instead:
// import jwtDecode from 'jwt-decode' // import dependency

// some logic
axios.post(`${axios.defaults.baseURL}/auth`, { email, password })
    .then(res => {
      const token = res.data.token;
      const user = jwtDecode(token); // decode your token here
      localStorage.setItem('token', token);
      dispatch(actions.authSuccess(token, user));
    })
    .catch(err => {
      dispatch(actions.loginUserFail());
  });