A way to specify nullable types in TypeScript whilst still getting the correct data at runtime.

A library providing useful nullables.

Zero-dependency TypeScript library for immutable array operations: filter nullables, upsert/toggle by key, deduplicate, enumerate, and more.

A library providing useful nullables.

Convenient functions for composing nullables and conditions using Promises.

Simple typings for nullables

Simple, fast, powerful parser toolkit for JavaScript.

Utility functions for working with nullable values

TypeScript utilities for type-safe error handling and optional values

JSON-schema builder with typescript safety

[](https://github.com/falkoschumann/muspellheim-utils-javascript/actions/workflows/build.yml) [![NPM Version](https://img.shields.io/npm/v/%40musp

Simple, fast, powerful parser toolkit for JavaScript.

Sample grammars and parsers in Galore

Framework-agnostic core for LLM extraction + human-in-the-loop review: the shared field/prompt-version vocabulary, the JSON-Schema round trip, OCR token matching, a fetch client with actionable errors, the ParseResult contract, and the date/timezone helpe

A library that allows you to create mongoose schemas derived from zod schemas, in an intiutive yet powerful way. Works without the need to add non-standard types to your zod schemas.

Represent fallible computations as values instead of using exceptions.

MySQL database generator. Generates SQL code to delete (if exists) and re-create a set of tables, defined by a JSON-format schema. Supports table multiple-inheritance, automatic primary keys, indexes, foreign key constraints, unique constraints, nullabl

The EkoHacks CLI: our everyday operations, automated one small command at a time.

A 5Kb maybe monad in JavaScript

TypeScript-first schema declaration and validation library with static type inference