RunJS
RunJS is a JavaScript playground for macOS, Windows and Linux. Write code with instant feedback and access to Node.js and browser APIs.
Install / Use
/learn @lukehaas/RunJSREADME
RunJS is a playground for JavaScript and TypeScript. It runs your code automatically and shows you instant results.
Why RunJS?
- An isolated space to run code experiments 🔬
- Great for learning and teaching 🧑🏫
- Support for code completion, type checking and documentation on hover ⚡️
- Easily install NPM packages 🚀
- Save snippets and build a snippet library 🧑💻
- Includes access to Node.js and Browser APIs 🖥️
Download the latest release here.
Links
Acknowledgements
RunJS icon designed by Giuseppe Caruso
Related Skills
node-connect
344.1kDiagnose OpenClaw node connection and pairing failures for Android, iOS, and macOS companion apps
frontend-design
96.8kCreate distinctive, production-grade frontend interfaces with high design quality. Use this skill when the user asks to build web components, pages, or applications. Generates creative, polished code that avoids generic AI aesthetics.
Writing Hookify Rules
96.8kThis skill should be used when the user asks to "create a hookify rule", "write a hook rule", "configure hookify", "add a hookify rule", or needs guidance on hookify rule syntax and patterns.
review-duplication
99.8kUse this skill during code reviews to proactively investigate the codebase for duplicated functionality, reinvented wheels, or failure to reuse existing project best practices and shared utilities.
Security Score
Audited on Mar 30, 2026