ionic 3 - storage.get function return null value outside the function

Question

storage. get function return null value out side the function. here is my code

username:any;

this.storage.get('user').then((value) => {
       this.username = value;
    });

console.log(this.username);

output : undefined;

i mean where is your `this.storage` definition? do you mean local storage? — Fateme Fazli, Apr 04 '18 at 06:33
this.storage.set('user',detail); yes i have set data in user — Videsh Chauhan, Apr 04 '18 at 06:35
Its _asynchronous_ because it uses promises.. your console.log is executed before value is returned from db — Suraj Rao, Apr 04 '18 at 06:35
Also if it is indeed `localStorage` then `then` function would throw error — Suraj Rao, Apr 04 '18 at 06:52

score 1 · Accepted Answer · answered Apr 04 '18 at 06:44

1

Why are you using function ? You can simply get the store value with the following code:

this.username = JSON.parse(localStorage.getItem('user'));

answered Apr 04 '18 at 06:44

i want to store array but it provide string – Videsh Chauhan Apr 04 '18 at 06:51
JSON.parse will convert string to array. – Apr 04 '18 at 06:55
this is my array { "user_type": "shipper", "name": "testuser", "mobile_number": "1234567890", "updated_at": "2018-04-04 06:57:42", "created_at": "2018-04-04 06:57:42", "id": 40 } localStorage.setItem('user', auth); first of all i am set the item but when i am getting the result this show me the error "JSON.parse: unexpected character at line 1 column 2 of the JSON data" here is my code for getItem this.username = JSON.parse(localStorage.getItem('user')); – Videsh Chauhan Apr 04 '18 at 07:00
`localStorage.setItem('user', JSON.stringify(auth));` save the auth data as string not object . – Apr 04 '18 at 07:05
its working ....thank you so much :) – Videsh Chauhan Apr 04 '18 at 07:11
most welcome :) – Apr 04 '18 at 07:17

score 0 · Answer 2 · answered Apr 04 '18 at 06:40

0

if you want to use local storage:

username:any;

this.username = localStorage.getItem('user');

console.log(this.username);

answered Apr 04 '18 at 06:40

Fateme Fazli

2 Answers2