JavaScript

The JavaScript editor opens .js text files with syntax highlighting, search, history, line wrapping, and code folding.

Interactive JavaScript editorEdit and Run JavaScript in the sandboxed console. Nothing here is saved to a tray.

Try the editor

Run and stop

Run executes the file in Worktray’s sandboxed runner and streams console output into a panel below the editor. Run becomes Stop while a script is executing, so you can terminate it at any point; long-running scripts are also capped by a timeout.

The sandbox

The runner is deliberately minimal: it has no DOM, no network affordances, and cannot reach Worktray’s own origin, localStorage, or IndexedDB. It exists to try out logic — parsing, transforms, quick calculations — not to render a page. For live HTML/CSS/JS rendering, use the HTML editor instead.

This is the same isolation described in Privacy and local data: code you run cannot read the files in your trays.