The lodash method `_.cloneDeep` exported as a module.

A tiny (240B to 501B) and fast utility to "deep clone" Objects, Arrays, Dates, RegExps, and more!

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Really Fast Deep Clone

Creates a shallow clone of any JavaScript value.

JavaScript test spies, stubs and mocks.

A simple and composable way to validate data in JavaScript (and TypeScript).

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.

extend like a boss

A tiny wrapper around Node.js streams.Transform (Streams2/3) to avoid explicit subclassing noise

JavaScript's functional programming helper library.

Next-generation ES module bundler

A practical functional library for JavaScript programmers.

Custom parser for ESLint

Higher-order functions and common patterns for asynchronous code

Turn ES6 code into readable vanilla ES5 with source maps

Recursively (deep) clone JavaScript native types, like Object, Array, RegExp, Date as well as primitives.