Radlist View collapsible item animation

[vikasacharya16]

I have raised an issue relating to animation of collapsible views on tap of radlistview items. stackoverflow

i achieved relatively close animation somehow kindly look at this, https://play.nativescript.org/?template=play-js&id=jJqwjY&v=4

@keyframes animation {
    from { 
        height: 0;
        overflow:hidden;
        background-color: gold;
        transition: height 1s ease;
    }
    100% { 
        transform:   translate(0,0);
       /* height: auto */ // This is also not working
        height: 100px; } // HOW TO GIVE HEIGHT DYNAMICALLY HERE
}

because of hard-coded height i'm not getting accordion effect as different elements have different heights.

I need a way to animate collpasible items based on its current height. So, i request you people to make height: auto should give expected result in such cases.