가능한 몇 가지 제목은 다음과 같습니다. 1. Angular 2에서 `ngIf`를 사용하여 CSS 전환을 작동시키는 방법은 무엇입니까? 2. Angular 2에서 `ngIf`가 CSS 전환을 중단하는 이유는 무엇입니까? 3. Angular 2: 원활한 전송을 위해 'ngIf'와 CSS 애니메이션 결합

<code class="html"><div class="note" [ngClass]="{'transition':show}" *ngIf="show">
  <p> Notes</p>
</div>
<button class="btn btn-default" (click)="toggle(show)">Toggle</button></code>

.transition{
  -webkit-transition: opacity 1000ms ease-in-out,margin-left 500ms ease-in-out;
  -moz-transition: opacity 1000ms ease-in-out,margin-left 500ms ease-in-out;
  -ms-transition: opacity 1000ms ease-in-out,margin-left 500ms ease-in-out ;
  -o-transition: opacity 1000ms ease-in-out,margin-left 500ms ease-in-out;
  transition: opacity 1000ms ease-in-out,margin-left 500ms ease-in-out;
  margin-left: 1500px;
  width: 200px;
  opacity: 0;
}

.transition{
  opacity: 100;
  margin-left: 0;
}

<code class="typescript">import { trigger, style, animate, transition } from '@angular/animations';

@Component({
  selector: 'my-app',
  animations: [
    trigger(
      'enterAnimation', [
        transition(':enter', [
          style({transform: 'translateX(100%)', opacity: 0}),
          animate('500ms', style({transform: 'translateX(0)', opacity: 1}))
        ]),
        transition(':leave', [
          style({transform: 'translateX(0)', opacity: 1}),
          animate('500ms', style({transform: 'translateX(100%)', opacity: 0}))
        ])
      ]
    )
  ],
  template: `
    <button (click)="show = !show">toggle show ({{show}})</button>

    <div *ngIf="show" [@enterAnimation]>xxx</div>
  `
})
export class App {
  show:boolean = false;
}</code>

<code class="html"><div class="note" [ngClass]="{'transition':show}" [hidden]="!show"></code>