Specify properties for which a variable, function, keyword or value must be used

Type-safe implementation of EventEmitter for browser and Node.js

Match a Unicode property or property alias to its canonical property name per the algorithm used for RegExp Unicode property escapes in ECMAScript.

Strict URL sanitization with security-focused validation

The node.js assert module, re-packaged for web browsers.

A blazing-fast equality comparison utility for a variety of use-cases

Parses set-cookie headers into objects

Implements the WebIDL algorithms for converting to and from JavaScript values

Blazing fast input validation and transformation ⚡

Normalizes data that can be found in package.json files.

Deterministic and safely JSON.stringify to quickly serialize JavaScript objects

Pure node.js library for comparing PNG-images, taking into account human color perception.

hint for best practices related to the usage of the Strict-Transport-Security response header

Extract code excerpts

Polyfill of future proposal for `util.parseArgs()`

Various operations on Uint8Array data

Like lodash isEqualWith but for shallow equal.

A stricter URI encode adhering to RFC 3986

PostCSS plugin for React Strict DOM

Enforce that all function components are wrapped in `React.memo`, and that all props and deps are wrapped in `useMemo`/`useCallback` so they don’t break memo.