Similar to the EICAR anti-virus simulator file. Use it to test your defenses. This package makes an outbound call to www.stepsecurity.io as part of the pre-install step.
Cross-browser Error parser
MIPS Simulator npm package
A minimalistic take on responsive iframes in the spirit of Pym.js.
web assembly h264 decoder
A universal command-line tool for managing iOS and Android devices, simulators, emulators and apps
Generate a TypeScript-based mock server from an OpenAPI spec in seconds — with stateful routes, hot reload, and REPL support.
WebdriverIO service that provides a better integration into Sauce Labs
Ethereum IDE and tools for the web
Scaffold a new Proto prototype: `npm create proto@latest myapp`. Designer-first native iOS prototyping environment that pairs with Claude Code.
This will remove the jitter and smooth the landmarks given by Mediapipe
extract the first frame in GIF without reading whole bytes, support both browser and nodejs, using stream-like decoder
Render WebM videos from Canvas frames
Simulate functions running in Cloudflare runtime
Native macOS simulator control plane with a browser client
This Exodus SDK feature allows you to simulate the state of an account after a given transaction. It's only supported for a small subset of assets, and simulation parameters depend on the asset.
React Native module which adds the ability to change the system volume on iOS and Android, listen to volume changes and supress the native volume UI to build your own volume slider or UX.
Provides common functionality to frontend app and plugins.
Implements a JavaScript async iterator protocol for consuming and producing binary netstrings.
WebSocket buffer utils
Stack traces as an array of stack frames with source maps support.
High-priority task queue for Node.js and browsers
Quantum Circuit Simulator
A free Modbus Device Simulator built with Next.js. Provides a real-time dashboard with paginated register tables, communication logs, and configurable TCP/RTU server settings.