'Angular 2 - Animation transition not working

I need a transition between 2 colors OnClick. Right now, this is my code:

Typescript

animations: [
    trigger('menubarState', [
        state('false', style({backgroundColor:'#43a047'})),
        state('true', style({backgroundColor:'#333'})),
        transition('false => true', animate('1s')),
        transition('true => false', animate('1s'))
    ])
]

...

export class MenubarComponent {
  menuActive: boolean = false;
  onMenuClick () {
    if (this.menuActive == false) {
      this.menuActive = true;
    } else {
      this.menuActive = false;
    }
  }
}

HTML

<li [@menubarState]="menuActive" (click)="onMenuClick()">
      <a><span class="material-icons icon">apps</span></a>
</li>

This does change the background-color as it should. The change, however, is instant instead of a transition.

I am using the Chrome, latest version.

htmlangulartypescriptangular2-animation


Solution 1:[1]

Expanding on the answer that Aaron Krauss provided. It is having issues with the direct interpretation of the true / false values; however, if you would rather not reference a string context, you can replace true and false in the above with the numbers 1 (true) and 0 (false). This proved to fix my issue and didn't require any annoying string interpretations.

trigger('menubarState', [
    state('0', style({backgroundColor:'#43a047'})),
    state('1', style({backgroundColor:'#333'})),
    transition('0 => 1', animate('1s')),
    transition('1 => 0', animate('1s'))
])

Solution 2:[2]

Expanding even more on Aaron Krauss' answer: I don't want to transform my booleans into strings, so I defined a getter:

public menuActive: boolean = false;

get menuState() {
  return this.menuActive ? 'active' : 'inactive'
}

And then in your animation definition (I merged the transitions since they are the same):

animations: [
  trigger('menubarState', [
    state('inactive', style({backgroundColor:'#43a047'})),
    state('active', style({backgroundColor:'#333'})),
    transition('inactive <=> active', animate('1s'))
  ])
]

And to be complete, the template:

<li [@menubarState]="menuState" (click)="onMenuClick()">
  <a><span class="material-icons icon">apps</span></a>
</li>

Solution 3:[3]

I have used animation while routing/clicking in angular 2.It works for onClick also. Use this code for all types of routing, You can use separate animation for separate route change or onclick.

import { animate, AnimationEntryMetadata, state, style, transition, trigger } from '@angular/core';
export const slideInDownAnimation: AnimationEntryMetadata =
  trigger('routeAnimation', [
    state('*',
      style({
        opacity: 1,
        backgroundColor:'#43a047',
        transform: 'translateX(0)'
      })
    ),
    transition(':enter', [
      style({
        opacity: 0,
        backgroundColor:'#333',
        transform: 'translateX(-100%)'
      }),
      animate('0.2s ease-in')
    ]),
    transition(':leave', [
      animate('0.5s ease-out', style({
        opacity: 0,
        backgroundColor:'red',
        transform: 'translateY(100%)'
      }))
    ])
  ]);

You can also modify the above code according to your choice.

Solution 4:[4]

I dont know if my response solve this question but I will say if you use Ionic/Angular trigger/transition not work but yes only trigger/state.

If you using Ionic/angular you should work with Ionic Animations. https://ionicframework.com/docs/utilities/animations

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 I. Buchan
Solution 2 Hetty de Vries
Solution 3
Solution 4 Peter

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