Angular 5, Observable and async function

问题

I have been trying to create a function that is similar to http.get(...) but not doing any http. Basically what I have done is that I defined a function

async myFunc(): Observable<string> {
 var myObservable: Observable<string>;

  //.....
  // the rest of the function's code comes here
  // ...

 return myObservable;
}

But I always get an error that it is not compatible with ES5/ES3 and should return a Promise object? But I am wondering how it became possible with Angular 5's http.get function? Where clearly it returns an Observable.

Thanks,
Artanis

回答1:

The async/await functionality works with promises. You can use Observable.defer to define an Observable with async/await functionality.

See this post for more information: https://medium.com/@benlesh/rxjs-observable-interop-with-promises-and-async-await-bebb05306875

来源：https://stackoverflow.com/questions/51680984/angular-5-observable-and-async-function