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 250ms 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 an 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; }