Picked up the slack and updated my eCards plugin. It feels good. I removed all jQuery dependencies and all JS code. Everything is now crossbrowser compatible and faster than the speed of light. Well, kinda.
Also, the plugin is fully compatible with Gutenberg.
= 4.7.1 = * FIX: Fixed Flexbox CSS Masonry = 4.7.0 = * PERFORMANCE: Replaced Masonry JS with Flexbox CSS * PERFORMANCE: Removed jQuery dependency * USABILITY: Replaced clunky JS calendar with HTML dropdowns * UPDATE: Updated WordPress compatibility