GitHub - alexpeattie/shadow-animation: With this jQuery plugin, you can extend the animate function to support the CSS box shadow-property. You can animate the color, the x- and y-offset, the blur-radius and spread-radius.
How to animate box-shadows with transforms and opacity - YouTube
3 ways to style CSS box-shadow effects - LogRocket Blog
Performant CSS Box-Shadow Transition
How to Animate CSS Box Shadows and Optimize Performance — SitePoint
Drop shadow be a Gradient - CSS Animated Gradient Shadow Effects - Quick HTML, CSS Tips & Tricks - YouTube