='加载的数据';resolve(data);},2000);// 假设数据加载需要2秒});}// 在组件中使用Promise对象exportclassMyComponentimplementsOnInit{data:any;ngOnInit(){this.loadData().then((data)=>{this.data=data;// 数据加载完成后继续执行其他逻辑// ...});}loadData():Promise<any>{returnloadData();}}...
ɵɵloadQuery 返回的 QueryList 被赋值给了 _t 变量,然后 _t 又被赋值给了 ctx.paragraphQueryList,这个 ctx 就是组件实例。 也就是说 QueryList 最终是赋值给了 AppComponent.paragraphQueryList。 注:此时此刻,TQuery 里面只是记入了 matched query 的 index 而已哦,而 LQuery 和 QueryList 里面都还是空的。
this.vcr.parentInjector);//创建注入器给 component (记得要继承哦)let factory =this.cfr.resolveComponentFactory(AbcComponent);//创建 component 工厂let component = factory.create(injector,[[this.elem.first.nativeElement],[this.elem.last.nativeElement]...
View the sample in GitHub toload PDF Viewer with local resources Run the application Use the following command to run the application in browser. ngserve--open The output will appear as follows. app.component.ts main.ts Preview SampleOpen in Stackblitz ...
redirects where additional redirects were previously ignored after an absolute redirect occurred. - Routes with `loadComponent` would incorrectly cause child routes to inherit their data by default. The default `paramsInheritanceStrategy` is `emptyOnly`. If parent data should be ...
至于factory,是 Angular Compiler 把你写的组件如 a.component.ts 编译为 a.component.ngfactory.js,即 Compiler 使用 @Component decorator 作为原材料,把你写的组件/指令类编译为另一个视图工厂类。 回到刚刚的 JIT/AOT Compiler,如果 a.component.ngfactory.js 是在 build 阶段生成的那就是 AOT Compiler,这个 ...
ngOnDestroy: called when the component is destroyed. ngOnChanges: called when an attribute changes. Additional change detection hooks for components include ngDoCheck, ngAfterContentInit, ngAfterContentChecked, ngAfterViewInit, and ngAfterViewChecked. Developers who understand these hooks may be especial...
view => data: 事件绑定,模板语法() angular的双向数据绑定就是 数据绑定 + 事件绑定 ,模板语法 [()] 5. 组件和指令的区别 component使用注解@Component修饰,directive使用注解@Directive修饰 component是组件化思想,基于组件创建应用,把应用划分成细小的可重复利用的组件,而directive用来在已经存在的DOM元素上实现一些...
export class AppComponent { name: string = ''; constructor(public elementRef: ElementRef) { // 使用构造注入的方式注入依赖对象 this.name = 'Semlinker'; // 执行初始化操作 } }详细的内容可以参考 - Angular 2 constructor & ngOnInitElementRef 有什么作用?在应用层直接操作 DOM,就会造成应用层与渲染...
export class SampleComponent implements AfterViewInit { @ViewChild("vc", {read: ViewContainerRef}) vc: ViewContainerRef; ngAfterViewInit() { this.vc.createComponent(componentFactory); } } 所以现在的问题是如何才能使用一个组件的组件工厂 angular modules 和 ComponentFactoryResolver ...