import { animate, AnimationEntryMetadata, state, style, transition, trigger } from '@angular/core';


export const slideInDownAnimation: AnimationEntryMetadata =
  trigger('routeAnimation', [
    state('*',
      style({
        opacity: 1
 
,
        transform: 'translateX(0)'
      })
    ),
    transition(':enter', [
      style({
        opacity: 0,
        transform: 'translateX(-100%)'
      }),
      animate('0.2s ease-in')
    ]),
    transition(':leave', [
      animate('0.5s ease-out', style({
        opacity: 0,
        transform: 'translateY(100%)'
 

      }))
    ])
  ]);

    2.在使用效果的元件ts中引入，我定義了一個demo.ts

import 'rxjs/add/operator/switchMap';
import { Component, OnInit, HostBinding } from '@angular/core';
import { Router, ActivatedRoute, ParamMap } from '@angular/router';

import { slideInDownAnimation } from '../animations';  //引入滑動頁面的效果

import { Hero, HeroService }  from './hero.service'
 
;

@Component({
  template: `
  <h2>HEROES</h2>
  <div *ngIf="hero">
    <h3>"{{ hero.name }}"</h3>
    <div>
      <label>Id: </label>{{ hero.id }}</div>
    <div>
      <label>Name: </label>
      <input [(ngModel)]="hero.name" placeholder="name"/>
    </div>
    <p>
      <button (click)="gotoHeroes()">Back</button>
    </p>
  </div>
  `,
  animations: [ slideInDownAnimation ]
})
export class HeroDetailComponent implements OnInit {
  @HostBinding('@routeAnimation') routeAnimation = true;
  @HostBinding('style.display')   display = 'block';
  @HostBinding('style.position')  position = 'absolute';

  hero: Hero;

  constructor(
    private route: ActivatedRoute,
    private router: Router,
    private service: HeroService
  ) {}

  ngOnInit() {
    this.route.paramMap
      .switchMap((params: ParamMap) =>
        this.service.getHero(params.get('id')))
      .subscribe((hero: Hero) => this.hero = hero);
  }

  gotoHeroes() {
    let heroId = this.hero ? this.hero.id : null;
    this.router.navigate(['/heroes', { id: heroId, foo: 'foo' }]);
  }
}