This is currently almost direct translation of (small part) deadsy's sdfx to TypeScript. License of the original work is MIT with Jason T. Harris.
I wanted to try if it's possible to build similar toolset for TypeScript. One of the goals is to have an UI next to an editor, which is readily usable from a static webpage.
Currently this can render sphere with same algorithm as in Deadsy's sdfx. See stl.test.ts.
No plans to go further at this point. TypeScript alone is not a good tool for this, but combination of Rust WASM and TypeScript could be a better plan. I will try to implement the marching cubes (octtree) with Rust next.