Extract Value from Json string in Ionic 2 - json

Question

I am using OAuth2 for authorization in my Ionic 2 App and the decoded token response(which I am getting from the BASE64.decode() function) is like the below(key-value form).I am storing it in a variable called 'tokendata' of type 'any'. Now I want to extract values from this decoded token. Now if I simply do 'tokendata.personnelnbr', it is not working. Also if I do a 'json.parse(tokendata) or a json.parse('tokendata'), store it in another variable say 'myVar' and then try to access 'myVar.personnelnbr', then also it is not working. Please help with the solution!
{
"client_id":"xxx",
"scope":"user_profile",
"sub":"yyy",
"amr":"external",
"auth_time":1499753830,
"idp":"eso_enterprise",
"upn":"yyy",
"email":"yyy",
"samaccount_name":"yyy",
"peoplekey":"1169",
"personnelnbr":"1108",
"given_name":"Deblina",
"sn":"Dutta Chowdhury",
"exp":1499,
"nbf":1499
}
The method where I am trying to access the 'personnelnbr' field is given below:
private initializeApp(): void
{
this.platform.ready().then(() => {
console.log("Before login Deblina");
/**
* Read in app configuration, get an oAuthV1 ESO token, register device with REBAR Notification Services
*/
this.configService.Initialize().subscribe(
() => this.esoService.getV2Token().subscribe(
(v2Token) => {
this.tokendata = BASE64.decode(v2Token);
alert("Token Deblina decoded: " + BASE64.decode(v2Token));
console.log("Token Deblina decoded: " + BASE64.decode(v2Token));
this.concatenatedToken = "'" +this.tokendata+ "'";
alert(this.concatenatedToken);
console.log(this.concatenatedToken);
this.myVar = JSON.parse(this.tokendata);
alert("Now:" + this.myVar.personnelnbr);
console.log("Now:" + this.myVar.personnelnbr);
this.myVar = JSON.parse(this.concatenatedToken);
alert("Now:" + this.myVar.personnelnbr);
console.log("Now:" + this.myVar.personnelnbr);
},
(error) => console.log(error),
() => { this.nav.setRoot(HomePage)}
),
(error) => console.log(error)
);
});
}

Answer 1

If you just want to to extract value, you can do this:
let datas = {
"client_id":"xxx",
"scope":"user_profile",
"sub":"yyy",
"amr":"external",
"auth_time":1499753830,
"idp":"eso_enterprise",
"upn":"yyy",
"email":"yyy",
"samaccount_name":"yyy",
"peoplekey":"1169",
"personnelnbr":"1108",
"given_name":"Deblina",
"sn":"Dutta Chowdhury",
"exp":1499,
"nbf":1499
};
for (let key in datas) {
console.log(key + " => " + datas[key]);
}