runjs

Install command: 
brew install --cask runjs

Name: RunJS

JavaScript playground that auto-evaluates as code is typed

https://runjs.app/

/api/cask/runjs.json (JSON API)

Cask code on GitHub

Current version: 1.15.1

Analytics:

Installs (30 days)
runjs 80
Installs (90 days)
runjs 256
Installs (365 days)
runjs 1,115
Fork me on GitHub