Case Study — Web

Interactive Coding Sandbox

A browser-based code editor and previewer executing HTML, CSS, and JS in a secure iframe sandbox.

Project Overview

An online sandbox for web developers. It runs code on-the-fly inside isolated iframes, providing console feedback and preview screens. Web Workers compile code templates, ensuring that infinite loops won't crash the editor.

Key Features & Scope

Monaco Editor integration supporting autocompletion and error highlights

Secure iframe sandbox preventing code scripts from accessing parent documents

Multi-file project tabs with mock node-modules imports

One-click code sharing generating copyable configuration links

System Architecture

Vite React application utilizing Monaco Editor instances. Compilation of files and ES modules resolution are executed in the browser via dedicated Web Workers.

Client InterfaceNext.js / React
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Backend CoreNode.js / Express
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Database NodeLocalStorage & URL State
Database: LocalStorage & URL State
Deployment: Vercel & Netlify
98
Performance
95
Accessibility
99
Best Practices
100
SEO
Verified Production Metrics
ReactMonaco EditorTailwind CSSViteWeb WorkersTypeScript

Keywords and concepts covered in this project case study:

Interactive Coding SandboxMonaco Editor React componentIframe sandboxed code previewerWeb Workers Javascript compiler

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