如何在按钮上打开div折叠按钮单击angular2

<button (click)="toggleDiv()">折叠按钮</button>
<div *ngIf="isDivVisible">
  这是要折叠的内容
</div>

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

@Component({
  selector: 'app-example',
  templateUrl: './example.component.html',
  styleUrls: ['./example.component.css']
})
export class ExampleComponent {
  isDivVisible: boolean = false;

  toggleDiv() {
    this.isDivVisible = !this.isDivVisible;
  }
}