TypeScript: 演练场 - 一个用于 TypeScript 和 JavaScript 的在线编辑器

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示例
了解 TypeScript 如何使用最少的附加语法改善 JavaScript 的日常使用。
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
探索 TypeScript 如何扩展 JavaScript，使其更安全，更便利。
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
Soundness
Structural Typing
Type Guards
Type Widening and Narrowing
Language Extensions
Enums
Nominal Typing
Types vs Interfaces
新闻
See the Release notes.
New JS Features
Control Flow Improvements
Errors for High Confidence Errors
New TS Features
Exact Optional Properties
Use unknown for Catch Variables
See the Release notes.
New TS Features
No Implicit Class Overrides
Separate Write vs Read on Properties
See the Release notes.
Fixits
Create Function from Call
New TS Features
Abstract Class Constructors
Rest Elements in Tuple Types
Smarter Type Alias Preservation
Use Index Accessors for Index Signatures
See the Release notes.
New JS Features
New JSX Support
See in JSDoc
Template Literals
Intro to Template Literals
Mapped Types with Template Literals
String Manipulation with Template Literals
See the Release notes.
New JS Features
JSDoc Deprecated
Logical Operators and Assignment
Nullish Coalescing
New TS Features
Named Tuples
Unknown in Catch
Variadic Tuples
New Checks
Class Constructor Code Flow
查看版本更新说明。
Syntax and Messaging
Export Modules From
Private Class Fields
Type Imports
Breaking Changes
Checking Unions with Index Signatures
JSDoc Improvements
Accessibility Modifiers
查看版本更新说明。
Syntax and Messaging
Optional Chaining
Nullish Coalescing
Flattened Error Reporting
Types and Code Flow
Assertion Functions
Uncalled Function Checks
Recursive Type References
Fixits
Big number literals
Const to let
Infer From Usage Changes
Learn what has changed in this website.
Language
Automatic Type Acquisition
Fixits
Config
New Compiler Defaults
JavaScript Playgrounds
Tooling
Sharable URLs
TypeScript Versions
Mobile Support
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Popular Documentation Pages

Everyday Types
All of the common types in TypeScript
Creating Types from Types
Techniques to make more elegant types
More on Functions
How to provide types to functions in JavaScript
More on Objects
How to provide a type shape to JavaScript objects
Narrowing
How TypeScript infers types based on runtime behavior
Variable Declarations
How to create and type JavaScript variables
TypeScript in 5 minutes
An overview of building a TypeScript web app
TSConfig Options
All the configuration options for a project
Classes
How to provide types to JavaScript ES6 classes

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Using TypeScript

Get Started
Download
Community
Playground
TSConfig Ref
Why TypeScript
Design
Code Samples
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
Soundness
Structural Typing
Type Guards
Type Widening and Narrowing
Language Extensions
Enums
Nominal Typing
Types vs Interfaces

Community

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@TypeScript
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