Angular NGRX / Tips and code examples

You can learn ngrx by watching the lesson of Todd Motto here. It is the most complete and linear way to learn ngrx. You should do this before diving into more precise topics. https://platform.ultimateangular.com/courses/ngrx-store-effects

Dispatch several actions from the same effects

• https://stackoverflow.com/questions/41701138/dispatch-multiple-actions-in-one-effect

Use of ngrx/entity

https://alligator.io/angular/ngrx-entity/

NGRX effects anti patterns

• https://medium.com/@m3po22/stop-using-ngrx-effects-for-that-a6ccfe186399

  A quoted article on using effects

• https://bertrandg.github.io/ngrx-effects-complex-stream-with-nested-actions/

• https://stackoverflow.com/questions/47554267/dispatch-multiple-action-from-one-effect

React to query success with a snackbar, confirm

Good tutorial that explain the refactoring of a component in ngrx http://brianflove.com/2018/01/10/ngrx-refactor-module/

And a tutorial to put snackbar management in store http://brianflove.com/2018/03/16/ngrx-mat-snackbar/

Update ngrx version 5

Medium article that explain the changes of ngrx v5 https://medium.com/ngrx/ngrx-5-and-schematics-2d8cc3906506

Using ngrx entity

• Medium article that explain the new feature of entity that allow to save some boiler plate code and standardize our components with entity https://medium.com/ngrx/introducing-ngrx-entity-598176456e15

• Not nice presentation but good example of using the adapter of ngrx entity https://www.concretepage.com/angular-2/ngrx/ngrx-entity-example#createEntityAdapter

• Alligator blog tutorial on ngrx/entity https://alligator.io/angular/ngrx-entity/

• The doc of ngrx entity adapter on github https://github.com/ngrx/platform/blob/master/docs/entity/adapter.md

Hot and cold observable

https://medium.com/@benlesh/hot-vs-cold-observables-f8094ed53339

Testing ngrx

Todd motto is a reference but is a paid resource https://ultimateangular.teachable.com/courses/ngrx-store-effects/lectures/3923989

Other articles about testing ngrx

• Official ngrx testing doc

Marble test

https://github.com/ReactiveX/rxjs/blob/master/doc/marble-testing.md https://medium.com/@benlesh/hot-vs-cold-observables-f8094ed53339 https://github.com/ngrx/platform/blob/master/docs/store/testing.md

Other uses of ngrx effects

Article that list different use case for effects

Start using ngrx/effects for this - NgRx inDepthinDepthDev

Start using ngrx/effects for thistim_deschryver

https://blog.angularindepth.com/start-using-ngrx-effects-for-this-e0b2bd9da165

Filter selector in component instead of creating a new selector

  getLines(): Observable<Lines[]> {
    return this.store
      .select(getProjecLines)
      .pipe(
        map(lines =>
          lines.filter(
            line => line.status === true,
          ),
        ),
      );
  }

Listening to actions dispatch in component

To prevent creating a boolean of the state of a completion in reducer. You can subscribe to the action dispatch the same way a reducer do.

showWarning() {
    return this.appActions.pipe(
      ofType(actions.ADD_LINES_SUCCESS),
      map(
        (action: actions.AddLinesSuccess) =>
          action.payload,
      ),
      takeUntil(this.onDestroy$),
      tap(({ lines }) => {