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Angular learning talks about standalone components (Standalone Component)
Angular learning talks about standalone components (Standalone Component)
Dec 19, 2022 pm 07:24 PM
This article will take you to continue learning angular and briefly understand the standalone component (Standalone Component) in Angular. I hope it will be helpful to everyone!
An exciting feature of Angular 14 is that Angular’s ??Standalone Component is finally here. [Related tutorial recommendations: "angularTutorial"]
In Angular 14, developers can try to use independent components to develop various components, but it is worth noting that the API of Angular independent components is still Without stabilization, there may be some destructive updates in the future, so it is not recommended for use in production environments.
Basic usage
##standalone is launched in Angular14 new features.
It can make your root module AppModule not so bloated
All components/pipe/directives should be introduced in the corresponding components when they are used
For example, this is the previous way of writing. We declare a
Footer component and then import this component in the used
<pre class='brush:php;toolbar:false;'>import { Component } from &#39;@angular/core&#39;;
@Component({
selector: &#39;app-footer&#39;,
template: ` <footer class="dark:bg-gray-800 dark:text-gray-50">Footer</footer> `,
})
export class FooterComponent {}</pre><pre class='brush:php;toolbar:false;'>import { NgModule } from &#39;@angular/core&#39;;
import { CommonModule } from &#39;@angular/common&#39;;
import { FooterComponent } from &#39;./footer.component&#39;;
@NgModule({
declarations: [HomeComponent, FooterComponent],
exports: [],
imports: [CommonModule],
})
export class AppModuleModule {}</pre>This kind of The writing method prevents us from getting rid of
, but in fact our intention is to replace it with
in AppComponent The writing method in
will actually be easier to manage and understandUse our new features
The Footer component will be transformed like this
import { Component } from '@angular/core';
@Component({
selector: 'app-footer',
// 將該組件聲明成獨(dú)立組件
standalone: true,
template: ` <footer class="dark:bg-gray-800 dark:text-gray-50">Footer</footer> `,
})
export class FooterComponent {}Then for example on the Home page we can use it like this
import { Component } from '@angular/core';
import { FooterComponent } from '@components/footer/footer.component';
@Component({
selector: 'app-home',
standalone: true,
// 聲明需要使用的 component / pipe / directive 但是它們也必須都是獨(dú)立組件
imports: [FooterComponent],
template: `<app-footer></app-footer>`,
})
export class WelcomeComponent {}Independent components can be directly used for lazy loading. Originally we had to use NgModule to achieve
import { NgModule } from '@angular/core';
import { RouterModule, Routes } from '@angular/router';
import { CustomPreloadingStrategy } from '@views/basic-syntax/router/customPreloadingStrategy';
const routes: Routes = [
{
path: 'home',
// 之前想要實(shí)現(xiàn)懶加載 這里必須是一個(gè)NgModule 現(xiàn)在使用獨(dú)立組件也可以 并且更加簡(jiǎn)潔
loadComponent: () => import('@views/home/home.component').then((mod) => mod.HomeComponent),
},
];
@NgModule({
imports: [RouterModule.forRoot(routes, { preloadingStrategy: CustomPreloadingStrategy })],
exports: [RouterModule],
})
export class AppRoutingModule {}More programming related knowledge, Please visit:
Programming TeachingThe above is the detailed content of Angular learning talks about standalone components (Standalone Component). For more information, please follow other related articles on the PHP Chinese website!
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