[Solved] You wrote this animation trigger but it does not run:trigger('slideIn', [ transition('void => *', [style({ transform:... | Angular

Angular - Animations

You wrote this animation trigger but it does not run:

trigger('slideIn', [
  transition('void => *', [style({ transform: 'translateX(-100%)' }), animate('300ms ease-in')])
])

What is the likely reason it does not animate when the element appears?

AThe trigger name 'slideIn' is not added to the component's animations array.

BThe transition syntax 'void => *' is invalid and causes errors.

CThe style property 'transform' cannot be animated in Angular.

DThe animate duration '300ms' is too short to see any effect.

Step-by-Step Solution

Solution:

Step 1: Check if the animation trigger is registered
Animations must be included in the component's animations array to run.
Step 2: Verify transition syntax and properties
'void => *' is valid syntax, and 'transform' can be animated; duration is reasonable.
Final Answer:
The trigger name 'slideIn' is not added to the component's animations array. -> Option A
Quick Check:
Animations must be registered in component [OK]

Quick Trick: Always add triggers to animations array in component decorator [OK]

Common Mistakes:

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