What classes should you not add to module declarations?

NgModule Declarations Array List -
We do not declare - Modules, Services, objects, and non-angular helper classes in the module's declarations. Stayed Informed - What Is Modules?

Syntax for NgModule declaration Array -

declarations: [

AppComponent,

LoginComponent,

MyPipe,

MyDirective

]

The non-Angular classes and objects as following as -

1. Strings

2. Numbers

3. Functions

4. Entity Models

5. Configurations

6. and other helper classes

Note - You can use directives, components, and pipes classes in a module declaration.

The example of what goes into declarations array list –

//JavaScript imports directives, components, and pipes classes

import { BrowserModule } from '@angular/platform-browser';

import { NgModule } from '@angular/core';

import { AppComponent } from './app.component';

import { LoginComponent } from './login/login.component';

import { MyPipe } from './my-pipe.pipe';

import { MyDirective } from './my-directive.directive';

import {MySericeService} from './my-serice.service';

import{MyModuleModule} from '../app/my-module/my-module.module';

//AppModule class with the @NgModule decorator.

@NgModule({

declarations: [

AppComponent,

LoginComponent,

MyPipe,

MyDirective

imports: [//DOM rendering, sanitization, and location

BrowserModule

providers: [//service providers

MySericeService,

MyModuleModule

bootstrap: [AppComponent] // bootstrapped entry component

})

export class AppModule {

//exporting app module

}

You can see in the above example, I have created and declared components, directives and pipes in the @NgModule class using the CLI commands.

1. ng g component my-component

2. ng g pipe my-pipe

3. ng g directive my-directive

4. ng g service mySerice

5. ng g module myModule

These CLI commands automatically imported components, directives, and pipes classes inside the module.

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