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ParaScript

ParaScript docs

ParaScript is a TypeScript dialect. Files end in .pts. The added syntax — signals and effects, when blocks, ~> and -> reactive bindings, |>, integer ranges, ..! / ..& / ..=, pure, memo, defer, arena — desugars to standard JavaScript at parse time.

The desugared output imports a small npm package, parabun-browser-shims, which contains the runtime side of the language. There is no other ParaScript runtime layer; the output is plain JS.

Sections

Section titled “Sections”
  • Install — set up the build pipeline. The compile step uses bun build today; the runtime side is the parabun-browser-shims package, aliased to the para:* specifier in your bundler.
  • Language reference — every extension, with the desugaring it emits.
  • Examples — three worked projects: frontend (DOM, Vite), backend (Node WebSocket server), edge (Cloudflare Workers).
  • Modules — API reference for each para:* import the language compiles into: signals, arena, parallel, pipeline, simd, arrow, csv.
Section titled “Related projects”

Parabun is a fork of Bun that ships ParaScript natively, plus a stack of native runtime modules (GPU compute, on-device LLM inference, V4L2 camera capture, ALSA audio, GPIO/I²C/SPI). Use Parabun if you want hardware acceleration in TypeScript on a Linux SBC, NUC, or similar.

The standalone path documented here works on any host with a JavaScript engine — browsers, Lambda, Cloudflare Workers, Deno, Node 18+.