ngComponentOutlet 是 Angular built-in 的 Structural Directive,它的作用就是输出 Dynamic Component。 App Template <button(click)="showComponent = SayHiComponent">show say hi</button><button(click)="showComponent = HelloWorldComponent">show hello world</button><ng-container[ngComponentOutlet]="showCom...
Angular 包装的 createComponent 不支持参数用 selector,我们只能自己在外部用 renderer.selectRootElement 获取到 node 再传进来。 另外,如果完全不提供 selector 和 node,内部会用组件 Definition 的 selector 创建一个 node。这个 node 会存放在最终返回的组件 Ref, 外部需要自己做 DOM Manipulation 把它 append ...
</template>`,})exportclassAppContent{display=false;@Input()dynamicRef:TemplateRef<HTMLDivElement>;myContext={$implicit:'World',valueInContent:"子组件内的value"};}
@Component({...}) export class AppComponent implements AfterViewInit { @ViewChild('username') input: ElementRef<HTMLInputElement>; ngAfterViewInit() { // ElementRef { nativeElement: <input> } console.log(this.input); } } So to use the native <input> we’ll need to reference this....
// src/app/heroes/hero-list.componentconstructor(publicheroService:HeroService) 简单的代码如下: import{Hero}from'../hero';import{HeroService}from'../hero.service';@Component({selector:'app-hero-list',template:'Heroes: {{heroes | json}}'})exportclassHeroListComponentimplementsOnInit{heroes!:He...
用于引导的根 AppComponent 就是一个入口组件。虽然它的选择器匹配了 index.html 中的一个元素,但是 index.html 并不是组件模板,而且 AppComponent 选择器也不会在任何组件模板中出现。Angular 总是会动态加载 AppComponent—— 无论把它的类型列在了 @NgModule.bootstrap函数中,还是命令式的调用该模块的ngDo...
Now, let’s continue with checkbox we have added. So this checkbox component in Angular Material implements a very similar API to the native checkbox we have in Html5. For example, in html5 in order to add checkbox we need to use input element with checkbox type and if we want to add...
In Angular, a node definition that describes an HTML element defines its own injector. In other words, an HTML element in a component’s template defines its own element injector. And this injector can populated with providers by applying one or more directives on the corresponding HTML element...
One of these two ways is by using the <aw-wizard-step> component. [stepId] A wizard step can have its own unique id. This id can then be used to navigate to the step. In addition the [stepId] of a wizard step is used as the id of the li element for the wizard step in the...
component.html, we can add a reference to our custom control. We’ll also need to add a yearsExperience property to our FormGroup in the component code: <label> Years experience: <app-custom-stepper [formControl]="bioSection.controls.yearsExperience"></app-custom-stepper> </label> The ...