type-fest

Seamless REST/GraphQL API mocking library for browser and Node.js.

Parse JSON with more helpful errors

Serialize/deserialize an error into a plain object

Find apps installed on your system. This util will help to find executables of a known app like Chrome, Firefox,... on Windows, Linux, and macOS out of the box.

Parses every stack trace into a nicely formatted array of hashes.

JSON Schema TypeScript definitions with complete inline documentation.

An optimised way to copy'ing an object. A small and simple integration

Builds a logical conjunction (AND) of multiple JSON schemas

TypeScript execution environment and REPL for node.js, with source map support

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Some useful utilities I often need

Strip comments from JSON. Lets you use comments in your JSON files!

Strict TypeScript and Flow types for style based on MDN data

Drizzle ORM package for SQL databases

Media Type Database

The ultimate javascript content-type utility.

Types for the TypeScript-ESTree AST spec

Prettier is an opinionated code formatter

the most correct and second fastest glob implementation in JavaScript

Express style path to RegExp utility

HTTP server cookie parsing and serialization

HTTP status utility

Runtime for Regenerator-compiled generator and async functions.

Packs ECMAScript/CommonJs/AMD modules for the browser. Allows you to split your codebase into multiple bundles, which can be loaded on demand. Supports loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.

A Query Language and Runtime which can target any service.

Promise based HTTP client for the browser and node.js

Next generation testing framework powered by Vite

Delightful JavaScript Testing.

An AST-based pattern checker for JavaScript.