rxjs-verify - runtime RxJS verification

1. Introduction
2. Usage
3. Source
4. Bugs
5. License

Introduction

Some operators in RxJS like switchMap expect you to return an Observable. If you return undefined by accident you get cryptic stack traces that don't point to the place to your switchMap call. If you provide undefined you will see an error like this one:

TypeError: You provided 'undefined' where a stream was expected. You can provide an Observable, Promise, ReadableStream, Array, AsyncIterable, or Iterable.

rxjs-verify is a drop in for rxjs which verifies places that expect observables and prints violations to console.error.

With rxjs-verify you will get console.error messages like the following if you provide an undefined observable in the wrong place:

Observable at index #1 expected but got undefined at Error at combineLatest (…/rxjs-verify/lib/index.js:6:40) at new MyComponent (…/my-component/my-component.component.ts:850:20)

Usage

Replace your rxjs imports with rxjs-verify and your 'rxjs/operators' with 'rxjs-verify/operators'.

Source

The upstream of this source code is https://git.ma300k.de/rxjs-verify/

Bugs

Report bugs to markus.peroebner@gmail.com via e-mail.

License

See the file LICENSE.