and also i found this link
Jongmin Kim (@cmiscm). is the guy who made this amazing example.
and these UI State change animation all done by using GSAP..i was amaze how smooth is it.. thats why i need to implement those type of effect on my own project. and also i want to know. is this can use for production project. and how the browser will handle. and how dom manipulation are handle, if anyone know know how to replicate that example. or any other way. please help me to understand this.