[css] 각도 2 ngIf 및 CSS 전환 / 애니메이션

한 가지 방법은 ngIf 속성에 setter를 사용하고 값 업데이트의 일부로 상태를 설정하는 것입니다.

StackBlitz 예제

fade.component.ts

 import {
    animate,
    AnimationEvent,
    state,
    style,
    transition,
    trigger
  } from '@angular/animations';
  import { ChangeDetectionStrategy, Component, Input } from '@angular/core';

  export type FadeState = 'visible' | 'hidden';

  @Component({
    selector: 'app-fade',
    templateUrl: './fade.component.html',
    styleUrls: ['./fade.component.scss'],
    animations: [
      trigger('state', [
        state(
          'visible',
          style({
            opacity: '1'
          })
        ),
        state(
          'hidden',
          style({
            opacity: '0'
          })
        ),
        transition('* => visible', [animate('500ms ease-out')]),
        transition('visible => hidden', [animate('500ms ease-out')])
      ])
    ],
    changeDetection: ChangeDetectionStrategy.OnPush
  })
  export class FadeComponent {
    state: FadeState;
    // tslint:disable-next-line: variable-name
    private _show: boolean;
    get show() {
      return this._show;
    }
    @Input()
    set show(value: boolean) {
      if (value) {
        this._show = value;
        this.state = 'visible';
      } else {
        this.state = 'hidden';
      }
    }

    animationDone(event: AnimationEvent) {
      if (event.fromState === 'visible' && event.toState === 'hidden') {
        this._show = false;
      }
    }
  }

fade.component.html

 <div
    *ngIf="show"
    class="fade"
    [@state]="state"
    (@state.done)="animationDone($event)"
  >
    <button mat-raised-button color="primary">test</button>
  </div>

example.component.css

:host {
  display: block;
}
.fade {
  opacity: 0;
}

답변

 <div *ngFor="let user of users" @flyInParent>
  <ly-user-detail [user]= "user" @flyIn></user-detail>
</div>

//the animation file


export const FLIP_TRANSITION = [
trigger('flyInParent', [
    transition(':enter, :leave', [
      query('@*', animateChild())
    ])
  ]),
  trigger('flyIn', [
    state('void', style({width: '100%', height: '100%'})),
    state('*', style({width: '100%', height: '100%'})),
    transition(':enter', [
      style({
        transform: 'translateY(100%)',
        position: 'fixed'
      }),
      animate('0.5s cubic-bezier(0.35, 0, 0.25, 1)', style({transform: 'translateY(0%)'}))
    ]),
    transition(':leave', [
      style({
        transform: 'translateY(0%)',
        position: 'fixed'
      }),
      animate('0.5s cubic-bezier(0.35, 0, 0.25, 1)', style({transform: 'translateY(100%)'}))
    ])
  ])
];

  <app-order-details *ngIf="orderDetails" [@fadeInOut] [orderDetails]="orderDetails">
  </app-order-details>