vowwch

Zero-dependency runtime contracts for any JavaScript function.

import { contract } from "vowwch"

const double = contract((n: number) => n * 2, {
  name: "double",
  input: (v: unknown): v is number => typeof v === "number",
  mode: "strict",
})

double(5) // 10
double("bad" as any) // throws VowwchViolationError

• Zero dependencies — No transitive supply chain risk
• Single-file vendorable — curl it into your project and own the source
• Predicate-based — (value: unknown) => value is T — no schema DSL to learn
• Three modes — strict (throw), warn (log), silent (zero cost)

Install

npm install vowwch

Docs

Full documentation at vowwch.vercel.app

License

MIT