JAVASCRIPT

extract payload of expired jwt token in js

if(err.name === 'TokenExpiredError') {
    const payload = jwt.verify(token, SECRET, {ignoreExpiration: true} );
    // your code
}

is jwt token expired

private tokenExpired(token: string) {
  const expiry = (JSON.parse(atob(token.split('.')[1]))).exp;
  return (Math.floor((new Date).getTime() / 1000)) >= expiry;
}

ngOnInit() {
  if (this.tokenExpired(token)) {
    // token expired
  } else {
    // token valid
  }
}

jwt expired

var current_time = Date.now() / 1000;
if ( jwt.exp < current_time) {
 /* expired */ 
}