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Codesandbox Documentation

website·Indexed Jun 3, 2026

https://codesandbox.io/docs/

Searchable website documentation for Codesandbox from https://codesandbox.io/docs/.

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What's inside Codesandbox Documentation

  1. CodeSandbox Font Stack

    The CodeSandbox editor loads several font families: Source Code Pro (monospace, weight 500), Roboto (weights 300-700), Poppins (weights 300-700), Inter (Regular, Medium, Bold), and Everett (Light, Regular, Medium). These are preloaded for performance.

  2. CodeSandbox Platform Overview

    CodeSandbox is a cloud-based online IDE tailored for web application development. The platform integrates VSCode (version 33) as its embedded code editor and uses BrowserFS to provide browser-based file system capabilities.

  3. JavaScript Bundle Structure

    The application uses code splitting with multiple JavaScript chunks: vendors~app, common-sandbox, common, vendors~app (main), default~app~embed variants, and the main app bundle (app.3304b2849.js). CSS is similarly split into common, vendors~app, default~app~embed, and app-specific chunks.

  4. BrowserFS Initialization

    CodeSandbox initializes BrowserFS in the browser to provide Node.js-style file system APIs. The window.process and window.Buffer globals are polyfilled using BrowserFS modules.