Development-only error handler middleware

Generates and consumes source maps

Babel Types is a Lodash-esque utility library for AST nodes

Experimental and currently incomplete module for JSON schemas for [Jest's](https://jestjs.io/) configuration.

A toolkit for JavaScript codemods

A querystring parser that supports nesting and arrays, with a depth limit

Allow parsing of jsx

Flow types for the Flow-ESTree spec produced by the hermes parser

This package is part of the [React Native CLI](../../README.md). It contains utilities for building reusable commands targetting Apple platforms.

YAML 1.2 parser and serializer

Run multiple promise-returning & async functions with limited concurrency

Utilities for working with htmlparser2's dom

Is this value negative zero? === will lie to you

Determine if the JS environment has `Symbol.toStringTag` support. Supports spec, or shams.

RFC4122 (v1, v4, and v5) UUIDs

ECMAScript scope analyzer for ESLint

Provides StructuredSource and functionality for converting range and loc vice versa.

a CSS selector parser

Decode strings according to the WHATWG Encoding Standard

A small library for working with 0- and 1-based offsets in a type-checked way.

Helper function to optimise call expression

Is this value a JS Date object? This module works cross-realm/iframe, and despite ES6 @toStringTag.

Strict TypeScript and Flow types for style based on MDN data

Get the byteLength out of a DataView, robustly.