Ionic 2/Angular 2 promise returning observable

Question

I have a situation where I need to fetch a piece of data from storage in an Ionic 2 application and then use that data to create an HTTP request. The problem that I am running i

Answer 1

Here's what you can do:

Your code below

 getToken() {
    return this.storage.get('token').then((token) => {
        this.token = token;
        return token;
    });
 }

changes to

getToken: Observable = 
    Observable.fromPromise(this.storage.get('token').then(token => {
    //maybe some processing logic like JSON.parse(token)
    return token;
}));

Then in your component you can consume it like would any other observable.

this.serviceClass.getToken.subscribe(token => { 
//whatever you want to with the token
});