Angular2 bind animation to pseudo element

Question

I am trying to use Angular2 animation system, for a pseudo element :before. As per animation flow, I need to define animation state:

animations: [
trigger('heroState', [
  state('inactive', style({
    backgroundColor: '#eee',
    transform: 'scale(1)'
  })),
  state('active',   style({
    backgroundColor: '#cfd8dc',
    transform: 'scale(1.1)'
  })),
  transition('inactive => active', animate('100ms ease-in')),
  transition('active => inactive', animate('100ms ease-out'))
])]

and then attach it to a DOM element, as follows:

<ul>
<li *ngFor="let hero of heroes"
    [@heroState]="hero.state"
    (click)="hero.toggleState()">
  {{hero.name}}
</li>

However, I want to attach this to a pseudo before element. How can I do that?

Answer 1

Try this please this will what you want.

<style>
h1::before {
    content: url(animation.html);
}
</style>

animation.html file

<ul>
<li *ngFor="let hero of heroes"
    [@heroState]="hero.state"
    (click)="hero.toggleState()">
  {{hero.name}}
</li>

Hope this works for you.

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