Rxjs: Runtime error: Observable.throw is not a function

[Zzzen]

RxJS version: 6.2.0

Code to reproduce:
https://stackblitz.com/edit/typescript-se5hib

import { Observable } from 'rxjs'
Observable.throw('hello')

Expected behavior:
It should not throws any exception, since it has passed typescript compilation.
Actual behavior:
Runtime error: Observable.throw is not a function
Additional information:
The implementation of Observable does not match its declaration. Also, Observable.if has same problem.

[benlesh]

In v6 and higher you want to import throwError, that throw static method is an unfortunate necessity leftover from v5 compat.

import { throwError } from 'rxjs';
throwError('hello');

[Zzzen]

Sorry, the real issue should be that the implementation of Observable does not match its declaration. The delaration file tells me that I can use Observable.throw, but actually no. It's deleted rather than deprecated.
rxjs/internal/Observable.d.ts file link L69

[leomleao]

Someone give this man a cookie!!! @benlesh