Angular实现动画

@Component({
  selector: 'app-post-detail-main',
  templateUrl: './post-detail-main.component.html',
  styleUrls: ['./post-detail-main.component.scss'],
  animations: [
    flyIn
  ]
})


import { flyIn } from '../../animations/fly-in';


import { trigger, state, style, transition, animate, keyframes } from '@angular/animations';

export const flyIn = trigger('flyIn', [
  state('in', style({ transform: 'translateX(0)' })),
  transition('void => *', [
    animate(300, keyframes([
      style({ opacity: 0, transform: 'translateX(-100%)', offset: 0 }),
      style({ opacity: 1, transform: 'translateX(25px)', offset: 0.3 }),
      style({ opacity: 1, transform: 'translateX(0)', offset: 1.0 })
    ]))
  ]),
  transition('* => void', [
    animate(300, keyframes([
      style({ opacity: 1, transform: 'translateX(0)', offset: 0 }),
      style({ opacity: 1, transform: 'translateX(-25px)', offset: 0.7 }),
      style({ opacity: 0, transform: 'translateX(100%)', offset: 1.0 })
    ]))
  ])
]);