Angular 2: Convert Observable to Promise

by

rxjs7

lastValueFrom(of('foo'));

https://indepth.dev/posts/1287/rxjs-heads-up-topromise-is-being-deprecated

rxjs6

https://github.com/ReactiveX/rxjs/issues/2868#issuecomment-360633707

Don’t pipe. It’s on the Observable object by default.

Observable.of('foo').toPromise(); // this

rxjs5

import 'rxjs/add/operator/toPromise';
import 'rxjs/add/operator/map';

...

this._APIService.getAssetTypes()
.map(assettypes => {
  this._LocalStorageService.setAssetTypes(assettypes);
})
.toPromise()
.catch(err => {
  this._LogService.error(JSON.stringify(err));
});

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