Tweak React components in real time. (Deprecated: use Fast Refresh instead.)

Body scroll locking that just works with everything 😏

FileAPI — a set of javascript tools for working with files. Multiupload, drag'n'drop and chunked file upload. Images: crop, resize and auto orientation by EXIF.

Cross domain local storage, with permissions

Type checking and DDD for JavaScript

Framework for transforming Cascading Style Sheets (CSS) from Left-To-Right (LTR) to Right-To-Left (RTL)

🥚 A library for building asynchronous user interfaces.

Turn your JavaScript objects into CSS classes.

Mouse gestures for Firefox

Client-side messaging channel for sending data from one browser tab to another

JSON-RPC over window.postMessage, with a Promise-based API.

Chrome extension to read economist.com in dark mode