Dealing with observable errors in Angular 2 beta.12 and RxJS 5 beta.3

Greetings,

Currently, I am working with Angular2 beta 12 within VS2015. Upon updating from rxjs version 5.0.0-beta.2 to beta.3, I started encountering several exceptions primarily related to promises.

For instance:

  1. The property map is not present in the type Observable<Response>
  2. The property share does not exist in type Observable<Response>
  3. It is reported that ambient modules declaration cannot specify relative module names
  4. Ambient modules are not allowed to be nested within other modules or namespaces.

Below is a snippet from package.json:

{
  "name": "ASP.NET",
  "version": "0.0.0",
  "scripts": {
    "tsc": "tsc",
    "tsc:w": "tsc -w",
    "lite": "lite-server",
    "start": "concurrent \"npm run tsc:w\" \"npm run lite\" "
  },
  ...
}

The issue seems to revolve around the map function used in this code sample:

...

In another scenario, the problem arises with the usage of share():

...

I've also noticed some red underlines on certain rxjs files for relative references like ../../Observable.

...

Moreover, my boot.ts file contains:

...

As for the HTML page:

...

I find myself at a loss and would greatly appreciate any help provided.

Many thanks, Dan.

typescriptangularasp.net-core-mvcobservablerxjs5

Answer №1

When working with operators in RxJS, remember that they are not automatically included in the Observable class.

To include them manually, you have two options:

import {Observable} from 'rxjs/Observable';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/share';

Alternatively, you can import all operators at once like this:

import {Observable} from 'rxjs/Rx';

Typically, you do not need to define rxjs in your SystemJS configuration within the map block. Simply including the corresponding bundled file via a script tag should suffice.

Answer №2

The recommended version of RxJS according to Angular's package.json is specified as RxJS 5.0.0-beta.2. You can find more details at this link.

Answer №3

If you encounter this issue in VS2015, there is a temporary solution provided on GitHub here

To address this problem at the moment, you can swap out C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\CommonExtensions\Microsoft\TypeScript\typescriptServices.js with the file available at https://raw.githubusercontent.com/Microsoft/TypeScript/Fix8518/lib/typescriptServices.js. Make sure to create a local backup first.

IMPORTANT: Confirm that you are using VS2015 Update 2 and have TypeScript version above 1.8.2 installed

(It caused issues for me when I tried this on Update 1)

By the way, I am currently utilizing rxjs 5.0.0-beta.6.

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