javascript - Angular 7 - 错误错误 : Uncaught (in promise): TypeError: Cannot read property 'forEach' of undefined

Question

当我在 component.ts 中设置动画时，我没有收到任何错误。但是，当将动画导出到单独的文件时，我收到如下所示的错误。

动画.ts

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

export const transAnimation = animation([
  trigger('fade', [
    state('void', style({ opacity: 0 })),
    transition(':enter', [
      animate(300)
    ])
  ]),
  trigger('fadeOut', [
    state('void', style({ opacity: 0 })),
    transition(':leave', [
      animate(300)
    ])
  ]),
  trigger('shake', [
    state('false', style({ transform: 'translateX(10px)' })),
    transition('0 => 1', [
      animate(300)
    ])
  ]),
  trigger('slideIn', [
    state('void', style({ transform: 'translateX(10px)' })),
    transition(':enter', [
      animate(300)
    ])
  ]),
  trigger('hideShow', [
    state('false', style({ opacity: 0 })),
    transition('0 => 1', animate(300)),
  ])
]);

组件.ts

import { transAnimation } from '../../animations';
[enter image description here][1]
@Component({
  selector: 'app-card-update',
  templateUrl: './card-update.component.html',
  styleUrls: ['./card-update.component.scss'],
  animations: [transAnimation]
})

Answer 1

问题是我正在导出一个数组。单独导出每个触发器时它可以工作!