The best feature? It supports npm modules! It's so much easier to practice JavaScript when you can see the solution in real time!Ĭassandra Rossall If you've never tried out RunJS before, give it a go! It's a JavaScript scratchpad which can also run your code. Michael Uloth So grateful to have discovered RunJS. Paul Stamatiou If you want to quickly see what a wee JavaScript snippet evaluates to, RunJS is a delightful way to find out. simple little sandbox to tinker with JS before writing it for real in my main environment. Supports TypeScript, Babel transpilation, Node and browser APIs altogether, import Node modules from a folder, and more.įlavio Copes Was looking for a simple Javascript REPL Mac app and ran across RunJS. awesome: RunJS, a JavaScript playground for Mac. Joe Previte If you want to know what a piece of JS code will do, there's no substitute for just RUNning it and seeing the result! RunJS has become an essential tool in my daily JS development, writing, and teaching work, unseating a bunch of other tools like consoles, CLIs, and in-browser code editors. This is one of my favorite tools for debugging and testing things quickly.

Stephen Grider RunJS - a desktop app that serves as a JavaScript scratchpad. Its similar to Swift playgrounds - every line of JS code will be evaluated separately, with output printed on the right.