Check out the package at npm.
Check out the library repository on GitHub. 
Check out the demo repository on GitHub to recreate the demo video above.
Draw on an LED matrix using a Raspberry Pi and Typescript and Node.js.
Takes a declarative approach to the excellent alexeden/rpi-led-matrix and extends some of its features. Manage sections of the board independently, draw shapes, text, images, and some simple effects.
Check out the package at npm.
Check out the library repository on GitHub.
Check out the demo repository on GitHub to recreate the demo video above.