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 = Hello
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"};}
Using an element for the myCustomer directive is clearly the right choice because you’re not decorating an element with some “customer” behavior; you’re defining the core behavior of the element as a customer component. 使用一个元素去对应myCustomer指令是一个显然正确的选择,因为你没有装饰一个...
@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....
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...
// 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...
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...
Now, let’s see how to create a component. To create a component, we need to follow three steps, Create a component. Register a component in a module. Add an element in an HTML markup. Step 1 - Create a Component Component can be created in two ways - i.e. by creating a custom...
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...