They seem to be from this library: https://amritpaldesign.com/toy-faces. Source: over 2 years ago

If you're into video game dev, then PixiJS is something you need to know about. It's a HTML5 game engine that provides a lightweight 2D library across all devices. This latest update has a new package structure, custom builds, graphics API overhaul, and lots more. You can read about all these changes in the PixiJS Migration Guide. Also big congrats to PixiJS for being part of the open source community for ten... - Source: dev.to / 2 months ago

I would need a renderer to display the graphics of my calculations on the "backend". After some research I think pixijs which is written in TS could be a great tool. Source: about 1 year ago

And if that seems to up your alley you could look into Javascript game/renderer frameworks. They have 2D engines like https://github.com/photonstorm/phaser or https://github.com/pixijs/pixijs . Or my personal choice A-Frame which is a 3D, AR and VR engine (XR) https://github.com/aframevr/ . Source: over 1 year ago

This has a high risk of being confused with pixi.js: https://github.com/pixijs/pixijs. - Source: Hacker News / almost 3 years ago

WebGL, I hear, has a similar API to OpenGL. (Also, WebGPU is coming at some point.) Or, you could use a thin library that handles the WebGL drawing of sprites for you. I prefer that option over using a full game engine: I find it's better to only include dependencies when they become necessary. I recently tried a web rendering library called PixiJS, and it seemed like a pretty clean and nice-sized API, and... Source: almost 3 years ago