CSS is made for animations, so it is better; but if you want something conditional (like the animation runs when you press a button), you should use JS
CSS is Cascade Style Sheet and is made for animations and defining the style, but if you want animation make them with JS or React
--- sometimes must be considered performance such as page speed! In JS, two-part for executing. 1- parse 2- execute but in CSS, Just needed parse for executing. -- CSS Animation it's simple and comfortable -- JS Animation The implement may harder than CSS. Debugging is harder than CSS. JS animation power more than CSS. Remind: 100ms faster -> increase 1% revenue.
help my code does not iterate