ngComponentOutlet 是 Angular built-in 的 Structural Directive,它的作用就是输出 Dynamic Component。 App Template show say hishow hello world<ng-container[ngComponentOutlet]="showComponent"> 有2 个 Dynamic Component,一个是 SayHi 组件,一个是 HelloWorld 组件。 点击其中一个按钮它就会 createComponent -...
card.component.js ɵɵprojectionDef 源码在projection.ts 搞来搞去就是做了下面这些 接着 结论:Card TNode.projection = [h1 TNode] 和 h1 TNode.projectionNext = p TNode。 接着看 ɵɵprojection 函数,它的源码在projection.ts 主要就是创建了一个 ngContent TNode,继续看 applyProjection 函数,...
组件内的上下文绑定: {{valueInContent}} ... 主页面的变量绑定: {{valueInApp}} </ng-template>`,})exportclassAppComponent{publicvalueInApp="valueInApp :)";}/// 一个子组件@Component({selector:'app-content',template:`我是子组件,下面的内容是动态加载 :) <template *ngTemplateOutlet="dyna...
Adding CSS reference Add the Angular PDF Viewer component’s styles as given below insrc/styles.cssfile. @import'../node_modules/@syncfusion/ej2-base/styles/material.css';@import'../node_modules/@syncfusion/ej2-buttons/styles/material.css';@import'../node_modules/@syncfusion/ej2-dropdowns...
docs: remove gitter reference (#60970) Apr 23, 2025 SECURITY.md docs: update security guide link to adev (#56469) Jun 17, 2024 WORKSPACE build: update io_bazel_rules_sass digest to cbe5261 (#60882) Apr 17, 2025 browser-providers.conf.d.ts ...
| [](https://github.com/angular/angular/commit/be23b7ce650634c95f6709a879c89bbad45c4701) | ComponentRef.setInput only sets input when not equal to previous (#49607) | ...
React Hook "useState" cannot be called at the top level. React Hooks must be called in a React function component or a custom React Hook function.eslintreact-hooks/rules-of-hooks 即使忽略了 ESLint,运行时也会报错,那么说明 React 的 useState 必须要定义在函数式组件内部,且不能是动态的,那么稍微...
添加完服务后,我们就可以在任何组件中通过构造函数注入 HeroService,通过 TS 的构造函数赋值属性的特性设置为公开的,这样组件内和模板中即可使用该服务端的函数和方法。 // src/app/heroes/hero-list.componentconstructor(publicheroService:HeroService) 简单的代码如下: ...
First create a template for a TypeScript component file: In the Files tab, click the Add button () on the toolbar. A new, Unnamed, template is added to the list. In the right-hand pane, specify the template name, let it be Angular Component, and component.ts as the file extension....
ThecanActivateAuthRolecan be used in the route configuration to protect specific routes. import{Routes}from'@angular/router';import{HomeComponent}from'./components/home/home.component';import{BooksComponent}from'./components/books/books.component';import{canActivateAuthRole}from'./guards/auth-role.guard...