JavaScript Playground — FMAC

Basic JavaScript

abc

A little space for JavaScript.

Code runs automatically as you type, after a short pause. See your console.log, console.warn, and console.error output below.

Select text to reveal Format selection, then choose JavaScript or JSON. Only the selection changes. Brackets and quotes close automatically. Tab inserts two spaces. Drag the middle line to resize, or focus it and use the arrow keys.

Code runs in a web worker without access to the page or DOM. Each run starts fresh and stops after five seconds.