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 CSS Box Shadows and Optimize Performance — SitePoint
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How to animate box-shadow with silky smooth performance | Tobias Ahlin
How to Animate CSS Box Shadows and Optimize Performance — SitePoint
CSS box-shadow Generator | Front-end Tools - High-performance and intuitive HTML / CSS generator