Angular service call function in component

Question

So I know you can have two unrelated components communicate with each other via a service by having one component emit an event in the service and the other subscribe to it

Answer 1

The answer above is correct except that you don't bootstrap your service, you will add your service in your providers array in the app.module.

@NgModule({
    declarations: [MyComponent],
    imports: [],
    providers: [MyService],
    bootstrap: [AppComponent]
})

Then you inject your service inside of the component

import { Component } from '@angular/core'

import { MyService } from './path/to/my.service'

...

export class MyComponent {

    constructor(private myService:MyService){}

}