JavaScript Starter

Learn JavaScript by coding

Free · In-App Purchases

Write and run JavaScript and TypeScript on your device. Explore Node.js, web development, Express, Hono, and WebSockets with guided lessons and hands-on exercises. JavaScript Starter is a coding and learning environment for exploring JavaScript, TypeScript, Node.js, web pages, and server development by writing and running real code. Write code, run programs, view web pages, and inspect output directly on iPhone, iPad, or Mac. No separate Node.js installation or development setup is required. Learn by Writing Code The included JavaScript Basics course provides 20 free lessons covering variables, conditions, loops, functions, strings, arrays, objects, error handling, and practical exercises. Learning Pro provides access to additional paid courses: - Introduction to Node.js Applications - Introduction to TypeScript - Introduction to HTML, CSS & JavaScript Development - Introduction to HTTP Services with Express - Introduction to HTTP Services with Hono - Web and Server Interaction Course content is available in English, Simplified Chinese, and Japanese. Lessons are organized around clear learning points and include explanations, example code, editable exercises, and reference implementations. Local checks validate console output, page content, or HTTP behavior, while your exercise code and progress are saved. Explore Different Project Environments - JavaScript: Run console programs with bundled Node.js and V8. Explore modules, asynchronous code, file operations, and network requests. - TypeScript: Check types before running, locate errors, and compile your code to JavaScript for execution. - Web pages: Write HTML, CSS, and JavaScript to learn DOM APIs, events, forms, and page interactions. - HTTP client and server: Build APIs with Express or Hono. Edit, run, and stop the client and server separately. - Web pages with a server: Connect browser pages to a local server through HTTP and WebSockets to explore data exchange and real-time updates. A Practical Coding Workspace - Switch between source code, console output, and web pages - Select and edit source files in multi-file projects - Prepare standard input or enter input interactively - View program output, type errors, and runtime exceptions - Work in a separate server workspace - Save code automatically - Browse built-in offline API notes and examples - Create multiple projects and duplicate, rename, delete, and restore them with IDE Pro Local Execution and Privacy No account is required. Source code is stored on your device, and TypeScript compilation and program execution happen locally without relying on developer servers to run your code. The app does not upload source code or input to developer servers for compilation or execution. Network requests in your programs and remote resources loaded by your pages connect to their respective services. Free Features and Optional Purchases JavaScript Starter includes one editable local project, the JavaScript Basics course, and the built-in API reference for free. IDE Pro is an optional one-time purchase that provides multiple local projects and complete project management features. Learning Pro offers optional 1-, 3-, and 12-month access periods for all paid courses available in your region. It does not renew automatically. IDE Pro and Learning Pro are purchased separately. About the Runtime The app bundles Node.js, TypeScript, Express, Hono, and WebSocket support. Web pages run in WebKit; browser and Node.js environments provide different APIs. Installing arbitrary npm packages and using native addons are not currently supported. Compatibility with every existing project is not guaranteed. Servers are intended for learning and testing within the app, not continuous background hosting. From your first script to interactive pages and local servers, JavaScript Starter helps you learn through practice. Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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- Added Node.js and V8 for expanded JavaScript capabilities. - Added TypeScript projects with type checking and compilation. - Added web page and HTTP client/server projects with Express, Hono, and WebSocket support. - Added six new courses and Learning Pro course access plans. - Improved lessons with learning points, reference implementations, and exercise checks. - Added an offline API reference and improved project navigation and workspace file switching.

Version 0.2.0

The developer, Dozen Network Technology Co., Ltd., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Usage Data
    • Diagnostics
    • Other Data

Privacy practices may vary based, for example, on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Provider
Dozen Network Technology Co., Ltd.
Size
151.8 MB
Category
Education
Compatibility
Requires iOS 17.0 or later.
  • iPhone
    Requires iOS 17.0 or later.
  • iPad
    Requires iPadOS 17.0 or later.
  • Mac
    Requires macOS 14.0 or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English and 2 more
  • English, Japanese, Simplified Chinese
Age Rating
4+
In-App Purchases
Yes
  • Learning Pro — 12 Months $11.99
  • Learning Pro — 3 Months $3.99
  • Learning Pro — 1 Month $0.99
  • JavaScript Starter IDE Pro $3.99
  • Learn More
Copyright
© 2026 Dozen Network Technology Co., Ltd.
  • Developer Website
  • Privacy Policy

    • More by Dozen Network Technology Co., Ltd.

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