In my application, I have two different bootstrap module (@NgModule
) running independently in one application. There are not one angular app bit separate bootstrap module and now I want they should communicate to each other and share data.
I know through @Injectable
service as the provider in the module, I can share data in all component under @NgModule
but how I will share data between two different module ( not component inside module ).
Is there a way one service object can be accessed in another module? Is there a way I can access the object of Service available in browser memory and use it in my other angular module?
As per the final version of Angular 2, services provided by a module are available to every other module that imports it.
The Official Style Guide advice that application-wide services (singletons) that are to be reused anywhere in the application should be provided by some Core Module
, that is to be imported in the main App Module
so it would be injectable everywhere.
If you do not use a structure that involves a Core Module with shared singletons, and you are independently developing two NgModules, and you want a service in one of them to be used in the other, then the only solution is to import the provider into the other :
Here's the provider module:
/// some.module.ts
import { NgModule } from '@angular/core';
import { SomeComponent } from './some.component';
@NgModule({
imports: [],
exports: [],
declarations: [SomeComponent],
providers: [ MyService ], // <======================= PROVIDE THE SERVICE
})
export class SomeModule { }
Here's the other module, that wants to use MyService
/// some-other.module.ts
import { NgModule } from '@angular/core';
import { SomeModule } from 'path/to/some.module'; // <=== IMPORT THE JSMODULE
import { SomeOtherComponent } from './some.other.component';
@NgModule({
imports: [ SomeModule ], // <======================== IMPORT THE NG MODULE
exports: [],
declarations: [SomeOtherComponent],
providers: [],
})
export class SomeOtherModule { }
This way, the service should be injectable in any component SomeOtherModule
declares, and in SomeModule itself - just ask for it in the constructor:
/// some-other.module.ts
import { MyService } from 'path/to/some.module/my-service';
/* ...
rest of the module
*/
export class SomeOtherModule {
constructor( private _myService: MyService) { <====== INJECT THE SERVICE
this._myService.dosmth();
}
}
If this doesn't answer your question, I invite you to re-formulate it.