Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

Typing of of Observable.create

See original GitHub issue

RxJS version: 4.5.2

The TypeScript signature for Observable.create is just:

static create: Function;

Is there a reason it can’t be given a richer type?

Issue Analytics

State:
Created 6 years ago
Reactions:1
Comments:6 (4 by maintainers)

Top GitHub Comments

2reactions

david-driscollcommented, Aug 9, 2017

Because TypeScript does not let static properties type change from parent to base classes, and subject’s create method takes 2 arguments.

https://github.com/ReactiveX/rxjs/blob/d2a32f9a18ebbf65bea798f558364571c91a9d79/src/Subject.ts#L42

FWIW I’ve just switched to using the constructor and it works just fine, and frankly that’s all create is doing anyway.

new Observable<T>(o => {
});

0reactions

lock[bot]commented, Jun 6, 2018

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.

Top Results From Across the Web

what's the correct way to create a typed Observable with RxJS?

Just use a subject myWork$ = new Subject<MyData>();. and you can call next when you want it to emit update(data: MyData) { this....

Using observables to pass values - Angular

Use the Observable constructor to create an observable stream of any type. The constructor takes as its argument the subscriber function to run...

Observable - RxJS

An Observable is a lazily evaluated computation that can synchronously or asynchronously return zero to (potentially) infinite values from the time it's invoked ......

Creating Observables in RxJS - This Dot Labs

The fromEvent operator will create an Observable that pushes a every event of a specified type that has occurred on a specified event...

Create operator - ReactiveX

You can create an Observable from scratch by using the Create operator. You pass this operator a function that accepts the observer as...