Constant animation_fill_mode

pub const animation_fill_mode: AttributeDescription;

https://developer.mozilla.org/en-US/docs/Web/CSS/animation-fill-mode

Usage in rsx

let animation_fill_mode = "value";

rsx! {
    // Attributes need to be under the element they modify
    div {
        // Attributes are followed by a colon and then the value of the attribute
        animation_fill_mode: "value"
    }
    div {
        // Or you can use the shorthand syntax if you have a variable in scope that has the same name as the attribute
        animation_fill_mode,
    }
};