What is the difference between declarations, providers, and import in NgModule?

Forums AngularWhat is the difference between declarations, providers, and import in NgModule?
Staff asked 1 month ago

Answers (1)

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Staff answered 1 month ago

Declaration :

Declaration are used to make directives.

Used to declare components, directives, pipes.

Providers :

Provides are used to make services.

Used to inject services required in component.

Imports : 

Import are used to import exported declaration of the other component module to the current module.

import supporting modules likes FormsModule,  RouterModule.

Here is the example :

import { BrowserModule } from ‘@angular/platform-browser’;
import { NgModule } from ‘@angular/core’;
import { HttpClientModule } from ‘@angular/common/http’;
import { FormsModule } from ‘@angular/forms’;
import { AppRoutingModule } from ‘./app-routing.module’;
import { AppComponent } from ‘./app.component’;
import { UserService } from ‘./user.service’;

@NgModule({

// declarations for the application
declarations: [
AppComponent,
],

//Imports for the application
imports: [
BrowserModule,
AppRoutingModule,
HttpClientModule,
FormsModule
],

// providers for the application
providers: [UserService],
bootstrap: [AppComponent]
})
export class AppModule { }

 

 

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