我有三个组成部分。它们是HomeComponent,SignInComponent和AppComponent。打开应用程序时显示我的主页(HomeComponent)。我单击打开登录页面的“登录”按钮。我希望在打开“登录页面”类时将其显示为正文。

我该怎么做?

// AppComponent
import { Component } from '@angular/core';

@Component({
  moduleId: module.id,
  selector: 'app',
  template: '<router-outlet></router-outlet>'
})
export class AppComponent {}

// SignInComponent
import { Component } from '@angular/core';

@Component({
    moduleId: module.id,
    selector: 'signin',
    templateUrl: './signin.component.html',
    styleUrls: ['./signin.component.css']
})
export class SignInComponent {}

// HomeComponent
import { Component } from '@angular/core';

@Component({
    moduleId: module.id,
    selector: 'home',
    templateUrl: './home.component.html'
})
export class HomeComponent { }

// Part of index.html
<body>
<app>
    <div class="spinner">
        <div class="bounce1"></div>
        <div class="bounce2"></div>
        <div class="bounce3"></div>
    </div>
</app>
</body>

最佳答案

您可以将根选择器更改为body,然后使用HostBinding装饰器

@Component({
  selector: 'body',
  template: `<child></child>`
})
export class AppComponent {
  @HostBinding('class') public cssClass = 'class1';
}

@Component({
  selector: 'child',
  template: `<button (click)="setClass()">Set class</button>`
})
export class ChildComponent {
  constructor(private rootComp: AppComponent) {  }
  setClass() {
    this.rootComp.cssClass = 'class2';
  }
}

关于javascript - 将类添加到Angular2上的正文,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/39971762/

10-16 13:41