在Angular2上向body添加类 | 在Angular2上向body添加类

本文介绍了在Angular2上向body添加类的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我有三个组成部分。这些是HomeComponent，SignInComponent和AppComponent。应用程序打开时，我的主页（HomeComponent）显示。我点击登录页面点击登录按钮。我打开它时想要登录页面课程。

I have three components. These are HomeComponent, SignInComponent and AppComponent. My Home Page (HomeComponent) is showing when the application opened. I clicked the "Sign In" button by signin page opens.I want "signin-page" class to body while opening it.

我该怎么办？

// 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>

推荐答案

您可以将根选择器更改为 body 然后使用 HostBinding decorator

You can change your root selector to body and then use HostBinding decorator

@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';
  }
}

这篇关于在Angular2上向body添加类的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！