Animations

Declare animations for properties with the animate keyword like this:

export component Example inherits Window {
    preferred-width: 100px;
    preferred-height: 100px;

    background: area.pressed ? blue : red;
    animate background {
        duration: 250ms;
    }

    area := TouchArea {}
}

This will animate the color property for 100ms whenever it changes.

Fine-tune animations using the following parameters:

• delay: the amount of time to wait before starting the animation

• duration: the amount of time it takes for the animation to complete

• iteration-count: The number of times a animation should run. A negative value specifies infinite reruns. Fractual values are possible. For permanently running animations, see animation-tick().

• easing: can be any of the following. See easings.net for a visual reference:

  • linear

  • ease-in-quad

  • ease-out-quad

  • ease-in-out-quad

  • ease

  • ease-in

  • ease-out

  • ease-in-out

  • ease-in-quart

  • ease-out-quart

  • ease-in-out-quart

  • ease-in-quint

  • ease-out-quint

  • ease-in-out-quint

  • ease-in-expo

  • ease-out-expo

  • ease-in-out-expo

  • ease-in-sine

  • ease-out-sine

  • ease-in-out-sine

  • ease-in-back

  • ease-out-back

  • ease-in-out-back

  • ease-in-circ

  • ease-out-circ

  • ease-in-out-circ

  • ease-in-elastic

  • ease-out-elastic

  • ease-in-out-elastic

  • ease-in-bounce

  • ease-out-bounce

  • ease-in-out-bounce

  • cubic-bezier(a, b, c, d) as in CSS

  Easing examples can also be found on the Easings tab of the gallery example.

It’s also possible to animate several properties with the same animation, so:

animate x, y { duration: 100ms; easing: ease-out-bounce; }

is the same as:

animate x { duration: 100ms; easing: ease-out-bounce; }
animate y { duration: 100ms; easing: ease-out-bounce; }