Animation Flip

Using Angular Animations to Create a "Flip" Animation



Imports:

In Angular, the animations module (@angular/animations) provides a set of functions that facilitate the creation of animations for DOM elements. Here are the imported functions and their purposes:

  • trigger: This function creates an animation trigger that can be associated with an element in the Angular template.
  • transition: Defines a transition between different animation states within a trigger.
  • animate: Specifies the animation to be applied during a transition.
  • style: Defines the initial CSS styles of an element.

Animation Definition:

In the provided code, a "flip" animation is defined using the animation trigger called flip. This trigger will be activated when an element is inserted into the page.



Transition to the Enter State (:enter):


When an element is inserted into the page, the :enter transition is triggered. Within this transition:

  • style({ ... }): Defines the initial style of the element before the animation. In this case, the element starts with a 3D transformation that puts it back-facing towards the screen (rotateY(-180deg)) and completely transparent (opacity: 0).
  • animate('0.7s ease-in-out', style({ ... })): Defines the animation to be applied to the element. This animation will have a duration of 0.7 seconds, with a smooth acceleration and deceleration (ease-in-out). During the animation, the element will rotate to its original position (rotateY(0)) and its opacity will increase from 0 to 1, making it fully visible.
  • transform: 'perspective(400px) translateZ(0) rotateY(-180deg)': This part defines a 3D transformation that applies a perspective effect (perspective(400px)) with a depth of 400 pixels, moving the element along the z-axis to the initial position (translateZ(0)), and rotating it around the y-axis by -180 degrees (rotateY(-180deg)). This rotation essentially flips the element backward, making it face away from the screen.
  • opacity: 0: This sets the opacity of the element to 0, making it fully transparent and invisible.
  • transform: 'perspective(400px) translateZ(100px) rotateY(0)': Here, another 3D transformation is applied. The perspective(400px) remains the same, but now the element is moved along the z-axis by 100 pixels (translateZ(100px)), bringing it closer to the screen. The rotateY(0) sets the rotation to 0 degrees, returning the element to its original orientation, facing toward the screen.
  • opacity: 1: This sets the opacity of the element to 1, making it fully opaque and visible.
This animation creates a visually appealing "flip" effect, where the element appears to flip when inserted into the page, providing an engaging user experience.

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