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Popular Documentation Pages

Basic Types
JavaScript primitive types inside TypeScript
Advanced Types
TypeScript language extensions to JavaScript
Functions
How to provide types to functions in JavaScript
Interfaces
How to provide a type shape to JavaScript objects
Variable Declarations
How to create an type a JavaScript variable
TypeScript in 5 minutes
An overview of building a TypeScript web app
TSConfig Options
JavaScript primitive types inside TypeScript
Classes
How to provide types to JavaScript ES6 classes

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Using TypeScript

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See how TypeScript improves day to day working with JavaScript with minimal additional syntax.
JavaScript Essentials
Hello World
Objects and Arrays
Functions
Code Flow
Functions with JavaScript
Generic Functions
Typing Functions
Function Chaining
Working With Classes
Classes 101
This
Generic Classes
Mixins
Modern JavaScript
Async Await
Immutability
Import Export
JSDoc Support
External APIs
TypeScript with Web
TypeScript with React
TypeScript with Deno
TypeScript with Node
TypeScript with WebGL
Helping with JavaScript
Quick Fixes
Errors
Explore how TypeScript extends JavaScript to add more safety and tooling.
Primitives
Any
Literals
Union and Intersection Types
Unknown and Never
Type Primitives
Tuples
Built-in Utility Types
Nullable Types
Meta-Types
Conditional Types
Discriminate Types
Indexed Types
Mapped Types
Language
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Structural Typing
Type Guards
Type Widening and Narrowing
Language Extensions
Enums
Nominal Typing
Types vs Interfaces

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