TypeScript Recipes vs Learn TypeScript Programming

Tap Run and the real output appears right under the code, along with any type errors. You know what the code does before it goes into your project. No Node.js or TypeScript to install, no IDE, no account. 360+ short examples, one task each. Over 90% run on Node.js 24 and pass strict TypeScript 7 type checking. You know what you need, but not the exact syntax: • How do I remove duplicates from an array? • How do I get an enum value from its name? • How do I merge two Maps? Each has a working example here. • 22 sections, including strings and dates, arrays and collections, classes and interfaces, enums, generics, arrow functions, async/await, exception handling, regular expressions, files, JSON, algorithms, and design patterns. • What changed from TypeScript 3.0 to 5.5, with before-and-after code: the unknown type, the ?. and ?? operators, template literal types, the satisfies operator, using declarations. • Reference, 120+ entries: keywords, operators, and utility types such as Partial, Pick, Record, and ReturnType. Tap a word in the code to look it up. • 200+ SQL queries: JOIN, GROUP BY, subqueries, window functions; more than half run on a practice database. • Search looks inside the code: type reduce to find every example that uses it. • Edit an example and run your version, or write your own: a type error shows up right away. • Works on iPhone, iPad, and Mac. • Everything except running code works offline. Free version: 190+ TypeScript examples and 120+ SQL queries, the full reference, and 12 runs and 12 edits a day (TypeScript and SQL runs share one limit). Full version: all examples and queries, unlimited edits and examples of your own, and up to 30 TypeScript and 80 SQL runs a day. One-time purchase, no subscription. Built by a developer for developers. The project behind it has been in active development since 2015.

Learn TypeScript Programming is a complete learning app designed for beginners, students, web developers, and JavaScript programmers who want to build strong modern development skills with TypeScript. Whether you are starting with TypeScript, improving your JavaScript knowledge, preparing for interviews, or learning modern web development, this app gives you a clear and structured path to follow. The app explains TypeScript concepts in a simple and practical way, helping you understand how typed JavaScript works and how to write cleaner, safer, and more scalable code. TypeScript is an open-source, object-oriented programing language, which is developed and maintained by MS under the Apache 2 license. It was introduced by Anders Hejlsberg, a core member of the development team of C# language. TypeScript is a strongly typed superset of JavaScript which compiles to plain JavaScript. It is a language for application-scale JavaScript development, which can be executed on any browser, any Host, and any Operating System. TypeScript is not directly run on the browser. It needs a compiler to compile and generate in JavaScript file. TypeScript is the ES6 version of JavaScript with some additional features. This app includes all the topics which help to learn TypeScript. These are Introduction of TypeScript, Features of TypeScript, Components of TypeScript, TypeScript first program, TypeScript Types, TypeScript Variables, TypeScript Operators, TypeScript Decision-making, TypeScript Loops, Functions, Classes, Arrays, Namespace, Module, Ambient, and many more. TypeScript cannot run directly on the browser. It needs a compiler to compile the file and generate it in JavaScript file, which can run directly on the browser. The TypeScript source file is in ".ts" extension. We can use any valid ".js" file by renaming it to ".ts" file. TypeScript uses TSC (TypeScript Compiler) compiler, which convert Typescript code (.ts file) to JavaScript (.js file). What you will learn TypeScript basics and syntax Variables and data types Type annotations Interfaces and types Functions Classes and objects Object oriented programming Union and intersection types Generics Enums Modules Arrays and tuples Type narrowing Advanced TypeScript concepts Error handling TypeScript with JavaScript Common interview questions Practical coding examples Why choose this app Step by step TypeScript lessons Beginner friendly explanations Clean and simple learning experience Practical code examples Quizzes to test your knowledge Progress tracking for your learning journey Useful for students and self learners Helpful for interview preparation Great for JavaScript developers Perfect for quick revision TypeScript is widely used in modern web development, frontend frameworks, backend development, large scale applications, and professional software projects. With this app, you can build a strong foundation and improve your coding confidence. Learn at your own pace and master TypeScript anytime. Start learning TypeScript today and take your programming skills to the next level.