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SPECIFICTION
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Nobuf JavaScript Playground

nobuf.com

Web
Visit nobuf.com
Spec score 6.4 #55 of 58 in Code Playground Software

Spec sheet

Purpose
The JavaScript & HTML Playground lets users write HTML, CSS, and JavaScript with a sandboxed preview and captured console.Read 5 Oct 2026 · nobuf.com
Integrations
The playground page describes HTML, CSS, and JavaScript editing, project import, and standalone HTML download, but does not name external integrations.Read 5 Oct 2026 · nobuf.com
Privacy
Nobuf says tool inputs and selected files are handled on-device and are not sent to an application server.Read 5 Oct 2026 · nobuf.com
Draft storage
A versioned draft is stored only in the current browser.Read 5 Oct 2026 · nobuf.com
Editors
It provides syntax-highlighted HTML, CSS, and JavaScript editors with preserved cursor position and undo history.Read 5 Oct 2026 · nobuf.com
Isolation
User code runs in a sandboxed iframe without same-origin or top-navigation permission, and messages are accepted only from the current iframe with matching random channel and run identifiers.Read 5 Oct 2026 · nobuf.com
Local processing
The playground runs in the browser, and Nobuf says it does not receive, store, or inspect user input.Read 5 Oct 2026 · nobuf.com
Preview and logs
Users can preview DOM output and inspect logs, warnings, runtime errors, and rejected promises without executing code in the parent page.Read 5 Oct 2026 · nobuf.com
Runtime support
The playground runs browser JavaScript rather than Node.js; ES Modules and import maps work, while Node built-ins, require, process, and bare npm imports are unavailable unless mapped to a browser-compatible URL.Read 5 Oct 2026 · nobuf.com
Saving and export
Users can keep a versioned local draft, import a project, or download a standalone HTML file.Read 5 Oct 2026 · nobuf.com
Site infrastructure
Nobuf says the site has no application API or account server and includes no third-party analytics.Read 5 Oct 2026 · nobuf.com
Stop behavior
Stop replaces the sandbox and invalidates old messages, but the page says browser scheduling prevents guaranteeing recovery from every synchronous infinite loop.Read 5 Oct 2026 · nobuf.com

Where Specifiction places it

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