TypeScript Playground

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Test and compile TypeScript code in real time. Experiment with TypeScript features and see the compiled JavaScript output.

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•620 uses today•Last updated: 11 days ago

TypeScript

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About TypeScript Playground

The TypeScript Playground is an interactive tool that allows you to write, compile, and run TypeScript code directly in your browser. It's perfect for learning TypeScript, testing code snippets, and experimenting with TypeScript features without setting up a local development environment.

Key Features

  • Real-time Compilation: See the JavaScript output as you type TypeScript code
  • Console Output: View the results of your code execution in the console panel
  • Configurable Options: Set target ECMAScript version and other compiler options
  • Error Checking: Get immediate feedback on TypeScript errors
  • Export Functionality: Download the compiled JavaScript code for use in your projects

What is TypeScript?

TypeScript is a strongly typed programming language that builds on JavaScript, giving you better tooling at any scale. It adds optional static typing to JavaScript, which can help catch errors early in the development process and improve code quality.

Key TypeScript Features

  • Static Typing: Define types for variables, function parameters, and return values
  • Interfaces: Define contracts for object structures
  • Classes: Use object-oriented programming with inheritance and access modifiers
  • Generics: Create reusable components that work with different types
  • Type Inference: TypeScript can often infer types without explicit annotations
  • Union and Intersection Types: Combine types in flexible ways
  • Enums: Define a set of named constants
  • Type Assertions: Tell the compiler to treat a value as a specific type

TypeScript Compilation

TypeScript code is compiled to JavaScript, which can run in any JavaScript environment (browsers, Node.js, etc.). The TypeScript compiler (tsc) removes type annotations and transforms TypeScript-specific features into standard JavaScript.

Target ECMAScript Versions

You can compile TypeScript to different versions of ECMAScript:

  • ES5: Compatible with older browsers
  • ES2015/ES6: Adds features like classes, arrow functions, and modules
  • ES2016-ES2020: Add progressively newer JavaScript features
  • ESNext: Latest ECMAScript features

Learning Resources

If you're new to TypeScript, here are some resources to help you get started: