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]...
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。
@Component({providers:[{provide:NgModuleFactoryLoader,useClass:SystemJsNgModuleLoader}]})exportclassModuleLoaderComponent{constructor(private_injector:Injector,privateloader:NgModuleFactoryLoader){}ngAfterViewInit() {this.loader.load('app/t.module#TModule').then((factory)=>{constmodule=factory.create(th...
- `REMOVE_STYLES_ON_COMPONENT_DESTROY` default value is now `true`. This causes CSS of components to be removed from the DOM when destroyed. You retain the previous behaviour by providing the `REMOVE_STYLES_ON_COMPONENT_DESTROY` injection token. ```ts import {REMOVE_STYLES_ON_COMPONENT_DESTR...
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 ...
This is helpful when building reusable components because it prevents a component from changing your model state except for the models that you explicitly pass in. 顾名思义,指令的隔离作用域隔离了除模块中明确添加到scope对象的任何东西。这在构建可复用组件时很有用,因为它防止组件在修改你的model状态时...
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...
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 ...
I would like to create extensions for some components already deployed in Angular 2, without having to rewrite them almost completely, as the base component could undergo changes and wish these changes were also reflected in its derived ...
ngOnInit- Initialize your component and load data from services that don't need refreshing on each subsequent visit. ionViewWillEnter- SinceionViewWillEnteris called every time the view is navigated to (regardless if initialized or not), it's a good method to load data from services. However...