#ngmodule

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What is an Angular Module?

New Post has been published on https://www.codesolutionstuff.com/angular-13-ngmodule-tutorial-with-example/

Angular 13 NgModule Tutorial with Example

In Angular, what is NgModule? If you're seeking for a quick definition of the Angular 12 Module, we may state that NgModule is a decorator that groups all of your Angular application's services, pipelines, directives, and components. Using the example of website development, we can say that a module will contain the footer, header, right section, centre section, and left section. You can define a module with NgModule. When you use the Angular CLI command to create a new project, NgModule is generated by default in the app.module.ts file. And it looks like this: import { BrowserModule } from '@angular/platform-browser'; import { NgModule } from '@angular/core'; // NgModule Angular service import { AppComponent } from './app.component'; import { NewComponentComponent } from './new-component/new-component.component'; @NgModule({ // NgModule decorator groups services, components, pipes and directives declarations: , imports: , providers: , bootstrap: }) export class AppModule { } As shown in the sample below, you must import NgModule. import { NgModule } from '@angular/core'; Take a look at the structure of the NgModule below  @NgModule({ declarations: , imports: , providers: , // To make your service globally available register in the providers array bootstrap: }) It all starts with @NgModule. It also has an object with bootstrap, providers, imports, and declarations in it.

Declaration

A declaration is a collection of components in basic language. Whenever you use the Angular CLI to create a new component. By default, Angular CLI adds the newly generated component to the declarations array. Declarations will include a reference to this component, as explained below. declarations:

Imports

The Imports array in an Angular application is a collection of modules that are required to run the application. We can further explain it using an example. The @NgModule Browser Module has already been imported, as you can see. If the application requires reactive forms and router service, you can include the module as shown below. import { BrowserModule } from '@angular/platform-browser'; import { NgModule } from '@angular/core'; import { ReactiveFormsModule } from "@angular/forms"; import { RouterModule } from "@angular/router"; @NgModule({ declarations: , imports: , providers: , bootstrap: })

Providers

If you wish to make your app's services globally available, declare custom services in the providers' array. The following are the services that will be provided. import { NgModule } from '@angular/core'; import { CartService } from './cart.service'; @NgModule({ providers: , }) export class UserModule { }

Bootstrap

Understanding Angular Modules and Its Types

Angular is a platform and framework for building client applications in HTML and TypeScript. Understanding the different types of Angular modules is a key factor for architecting or refactoring an application. Furthermore, modules are a great way to organize an application and extend it with capabilities from external libraries.

Angular Module: NgModule

NgModuleis a core building block of…

Angular 6 Sharing Service… or not…

Different ways to share Service instance in Angular 6.

Service instance shared across entire application.

Declare `providedIn: ‘root’` property of `@Injectable` decorator in the Service. Then inject service to component’s constructor as usual.

import { Injectable } from '@angular/core'; @Injectable({ providedIn: 'root' }) export class Service1Service { constructor() { } }

Declare service…

Angular – All Possible Solutions for ‘No NgModule’

The error “No NgModule metadata found for ‘AppModule'” could be caused by various reason:

Moving Angular project folder.

Upgrading dependencies.

Upgrading Angular version.

Here are summary of all possible answers I have found during my battle. All answers are from Github and Stackoverflow.

You are trying to bootstrap App, which is not a real module. Instead, bootstrap Module. Source.

A simple…