cubic-bezier() easingThe cubic-bezier() CSS easing function interpolates along a smooth curve, creating animations and transitions with continuous changes in speed. The ease, ease-in, ease-out, and ease-in-out keyword values are presets for common Bézier curves.animationAnimationwidely2015-07-292018-01-29https://drafts.csswg.org/css-easing-2/#cubic-bezier-easing-functionshttps://developer.mozilla.org/docs/Web/CSS/Reference/Values/easing-functioncss.types.easing-functioncss.types.easing-function.cubic-bezierhttps://nowyoucanuse.com/features--cubic-bezier-easing.html