Pub/Sub Service for Angular 7 abd above (Now available for Angular 17 and above)

A simple publisher/subscriber service. This repository is forked from angular-pubsub and the only reason I changed it was to use RXJs version 6 and above. and updated the angular packages.

All credit goes to the owner and contributers of angular-pubsub repo.

Usage

• Import service in your codes or download via npm or bower.

npm i --save angular7-pubsub

• Add module bundle to imports in your application.

...

import { PubSubModule } from 'angular7-pubsub'; // <= HERE

@NgModule({
declarations: [
    RootComponent,
    NavigationComponent,
    OverlayComponent
],
imports: [
    BrowserModule,
    FormsModule,
    HttpModule,
    PubSubModule.forRoot() // <= AND HERE
],
providers: [], 
bootstrap: [RootComponent]
})

...

• And import service wherever you want

Documentation

Class Overview

declare class PubSubService {
    private events: Object;
    $pub(event: string, eventObject?: any): void;
    $sub(): undefined;
    $sub(event: string): Observable<any>;
    $sub(event: string, callback: (value: any) => void): Subscription;
    $sub(event: string, callback: (value: any) => void, error: (error: any) => void): Subscription;
    $sub(event: string, callback: (value: any) => void, error: (error: any) => void, complete: () => void): Subscription;
}

PubSubService.$pub(event: string, eventObject?: any): void

Publish event to all subscriber.

etc.

export class OverlayComponent implements OnInit, OnDestroy {
    constructor(private pubsub: PubSubService) { }

    anyFunc(){
        this.pubsub.$pub('pleaseCloseSidenav', 'helloIAmOverlay');
    }
}

PubSubService.$sub(event: string): Observable

Subscribe to channel.

etc.

export class NavigationComponent implements OnInit, OnDestroy {
    closeSidenavSub: Subscription;
    openSidenavSub: Subscription;
    constructor(private pubsub: EventDispatcherService) { }

    ngOnInit() {
        // usage of $sub(event: string): <Observable<any>>;
        this.closeSidenavSub = this.pubsub.$sub('pleaseCloseSidenav').subscribe((from) => {
            this.sidenavOpened = false;
        });

        // usage of $sub(event: string, callback: (value: any) => void, error?: (error: any) => void, complete?: () => void): Subscription;
        this.openSidenavSub = this.pubsub.$sub('pleaseOpenSidenav', (from) => {
            this.sidenavOpened = true;
        });
    }
    ngOnDestroy() {
        this.closeSidenavSub.unsubscribe();
        this.openSidenavSub.unsubscribe();
    }

See Changelog $sub method have one bug. RxJS Subscriber call subscribe method on start like Angular 1.x $scope.$watch.

Build the source

Follow the steps to run the tests and build the source code.

npm install
npm test
npm run build

Commands above will generate the ready to use bundles under the ./dist folder.