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Create custom JavaScript errors that also match instanceof.

Lightweight emoji picker distributed as a web component

Metronome is a design system we use for developing consistent user experiences at [B12](https://www.b12.io). We recently open sourced it to allow us to use it in other open source projects, and to make the useful and reusable components more widely availa

OpenTelemetry Node SDK provides automatic telemetry (tracing, metrics, etc) for Node.js applications

Tempo and timing math for musicians. No network and no key.

The best React custom scrollbars component

Detect whether a terminal supports color

Custom esbuild builders for Angular build facade. Allow to modify Angular build configuration without ejecting it

Create a React component from a custom element.

@vue/runtime-core

Generate metadata for Excel Custom Functions.

Wrap your component up as a custom element

JSON parser and stringifier for custom numbers (e.g. BigInt)

Routers to help build custom navigators

A React component wrapper for web components.

The remark plugin for supporting custom heading id also including default id

A tiny framework agnostic color picker element for modern web apps

Timing and scheduling engine — transport, tempo, look-ahead tick windows, rulers

Web3 Contracts for Metronome Token