typescript-toolkit 4.2.0

typescript-toolkit

🔧✨ Tiny helpers for TypeScript applications

Small, focused utilities you import one at a time.

npm install @peerigon/typescript-toolkit --save

Also available on JSR.

Import only the utilities you need. Each one is exposed as its own subpath:

import { assert } from "@peerigon/typescript-toolkit/assert";

Module	Description	Docs
`assert`	Assert a value is not `null` or `undefined`, with TypeScript narrowing	→
`need`	Assert a value is not `null` or `undefined` and return it with a narrowed type	→
`dedupe`	Remove duplicate values from an array while preserving first-occurrence order	→
`emitter`	Minimal typed event emitter with payload objects per event	→
`enums`	Lightweight string-enum alternative for `erasableSyntaxOnly` TypeScript projects	→
`match`	Exhaustive pattern matching with compile-time case checks, similar to `switch`	→
`metadata`	Typed metadata attached to objects via per-channel WeakMap stores	→
`namespace`	Hierarchical namespaces with exclusive member claims and dotted prefixes	→
`result`	Type-safe error handling with pending, success, and error states	→
`signals`	Push-based reactive state with explicit watchers and `signal.from` adapters	→
`sleep`	Promise-based delay with optional `AbortSignal` cancellation	→
`stable-stringify`	Deterministic stringify for JSON + Map/Set/BigInt/Symbol/Date/RegExp	→
`stable-stringify/json`	JSON-only deterministic `JSON.stringify` with sorted object keys	→
`unwrap`	Extract values from `Result` or nullable types, with optional fallback support	→