Support for representing 64-bit integers in JavaScript

A spring that solves your animation problems.

React component that adds a horizontal scrollbar to the top of a component

Sanitize strings for use as JavaScript identifiers & property names

PNG encoder/decoder in pure JS, supporting any bit size & interlace, async & sync with full test suite.

A simple MD5 hash function for JavaScript supports UTF-8 encoding.

Uniqueness functions

Turn JSX into React function calls

Deep comparison of 2 instances for should.js

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

ECMAScript parsing infrastructure for multipurpose analysis

Compare, format, diff and serialize any JavaScript value

Get an array of recursive directory contents

a jest transformer to make testing with svgs in react nicer

Google's libphonenumber pre-compiled with the closure compiler

Blazing fast and accurate glob matcher written in JavaScript, with no dependencies and full support for standard and extended Bash glob features, including braces, extglobs, POSIX brackets, and regular expressions.

This transformer wraps all typeof expressions with a method that replicates native behaviour. (ie. returning “symbol” for symbols)

Blazing-fast pixel-by-pixel image comparison with block-based optimization. 1.5x times faster than pixelmatch

Does a shallow comparison of two objects, returning false if the keys or values differ.

This package exports a few of the CSS variables that we use in Facebook projects. This is not the full list we have internally but focused on making available the minimum set needed by our open source projects.