Hello to all, welcome to therichpost.com. In this post, I will tell you, Angular 16+ Data Sharing | State Management Between Components Using NGRX.

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Angular 17 came and if you are new then please check below links:

Angular 16 Basic Tutorials

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Here is the code snippet and please use it carefully:

1. Very first, you need run below commands into your terminal to get angular 17 fresh setup:

Also you have latest nodejs installed on your system

npm install -g @angular/cli //Setup Angular17 atmosphere

ng new angularngrx //Install New Angular App

/**You need to update your Nodejs also for this verison**/

cd angularngrx //Go inside the Angular 17 Project

2. Now run below commands into your terminal to get ngrx and bootstrap modules into your angular 17 application:

I use mostly use bootstrap to make application looks good

npm install bootstrap --save

npm install @ngrx/store --save

3. Now add below code into your angular.json file:

"styles": [
  ...
  "node_modules/bootstrap/dist/css/bootstrap.min.css",
  
],
...

4. Now you have to create counter.actions.ts file inside src/app folder and add below code into that file:

import { createAction } from '@ngrx/store';

export const increment = createAction('[Counter Component] Increment');
export const decrement = createAction('[Counter Component] Decrement');
export const reset = createAction('[Counter Component] Reset');

5. Now create counter.reducer.ts file inside src/app folder and add below code into that file:

import { createReducer, on } from '@ngrx/store';
import { increment, decrement, reset } from './counter.actions';

export const initialState = 0;

const _counterReducer = createReducer(initialState,
  on(increment, state => state + 1),
  on(decrement, state => state - 1),
  on(reset, state => 0),
);

export function counterReducer(state:any, action:any) {
  return _counterReducer(state, action);
}

6. Now run below command into your terminal to create new component:

ng g c componentsecond

7. Now add below code into your src/app/app.module.ts file:

...
import { StoreModule } from '@ngrx/store';
import { counterReducer } from './counter.reducer';
import { Routes, RouterModule } from '@angular/router';
const appRoutes: Routes = [
  { path: 'secondcomponent', component: ComponentsecondComponent }
];
...
imports: [
   ...
   StoreModule.forRoot({ count: counterReducer }),
    RouterModule.forRoot(
      appRoutes,
     { enableTracing: true } // <-- debugging purposes only
    ) 
  ],

8. Now add below code into src/app/app/component.ts file:

...
import { Store, select } from '@ngrx/store';
import { Observable } from 'rxjs';
import { increment, decrement, reset } from './counter.actions';
...
export class AppComponent {
...
count$: Observable<number>; 
constructor( private store: Store<{ count: number }>){
    this.count$ = store.pipe(select('count'));
  }
increment() {
    this.store.dispatch(increment());
  }
 
  decrement() {
    this.store.dispatch(decrement());
  }
 
  reset() {
    this.store.dispatch(reset());
  }
}

9. Now add below into src/app/app.component.html file:

<nav class="navbar navbar-expand-sm bg-light">

  <!-- Links -->
  <ul class="navbar-nav">
    <li class="nav-item">
      <a class="nav-link" [routerLink]="['/']">Home</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" [routerLink]="['/secondcomponent']">Second Component</a>
    </li>
  </ul>

</nav>
<div class="container text-center">
  <h1 class="mt-5 mb-5">Angular 17 NGRX Working Example with multiple Components</h1>

  <button class="btn btn-primary mb-5 mt-5" id="increment" (click)="increment()">Increment</button>

   <div>Current Count: {{ count$ | async }}</div>

   <button class="btn btn-primary mb-5 mt-5 mr-5" id="decrement" (click)="decrement()">Decrement</button>

   <button class="btn btn-primary" id="reset" (click)="reset()">Reset Counter</button>

<router-outlet></router-outlet>
</div>

10. Now add below into your src/app/componentsecond/componentsecond.component.ts file:

...
import { Store, select } from '@ngrx/store';
import { Observable } from 'rxjs';

export class ComponentsecondComponent implements OnInit {
  ...
  count$: Observable<number>; 
  constructor( private store: Store<{ count: number }>) { this.count$ = store.pipe(select('count')); }

  

}

11. Finally add below into your src/app/componentsecond/componentsecond.component.html file:

<div>Current Count: {{ count$ | async }}</div>

This is it and don’t forget to run ng serve command in the end. If you have any kind of query then please do comment below.

Note:

The main purpose of this pot is to tell you, how to easily share data between components in angular 17.

Jassa

Thanks