Learning TypeScript

Spis treści książki

• Preface
  • Who Should Read This Book
  • Why I Wrote This Book
  • Navigating This Book
    • Examples and Projects
  • Conventions Used in This Book
  • Using Code Examples
  • OReilly Online Learning
  • How to Contact Us
  • Acknowledgments
• I. Concepts
• 1. From JavaScript to TypeScript
  • History of JavaScript
  • Vanilla JavaScripts Pitfalls
    • Costly Freedom
    • Loose Documentation
    • Weaker Developer Tooling
  • TypeScript!
  • Getting Started in the TypeScript Playground
    • TypeScript in Action
    • Freedom Through Restriction
    • Precise Documentation
    • Stronger Developer Tooling
    • Compiling Syntax
  • Getting Started Locally
    • Running Locally
    • Editor Features
  • What TypeScript Is Not
    • A Remedy for Bad Code
    • Extensions to JavaScript (Mostly)
    • Slower Than JavaScript
    • Finished Evolving
  • Summary
• 2. The Type System
  • Whats in a Type?
    • Type Systems
    • Kinds of Errors
      • Syntax errors
      • Type errors
  • Assignability
    • Understanding Assignability Errors
  • Type Annotations
    • Unnecessary Type Annotations
  • Type Shapes
    • Modules
  • Summary
• 3. Unions and Literals
  • Union Types
    • Declaring Union Types
    • Union Properties
  • Narrowing
    • Assignment Narrowing
    • Conditional Checks
    • Typeof Checks
  • Literal Types
    • Literal Assignability
  • Strict Null Checking
    • The Billion-Dollar Mistake
    • Truthiness Narrowing
    • Variables Without Initial Values
  • Type Aliases
    • Type Aliases Are Not JavaScript
    • Combining Type Aliases
  • Summary
• 4. Objects
  • Object Types
    • Declaring Object Types
    • Aliased Object Types
  • Structural Typing
    • Usage Checking
    • Excess Property Checking
    • Nested Object Types
    • Optional Properties
  • Unions of Object Types
    • Inferred Object-Type Unions
    • Explicit Object-Type Unions
    • Narrowing Object Types
    • Discriminated Unions
  • Intersection Types
    • Dangers of Intersection Types
      • Long assignability errors
      • never
  • Summary
• II. Features
• 5. Functions
  • Function Parameters
    • Required Parameters
    • Optional Parameters
    • Default Parameters
    • Rest Parameters
  • Return Types
    • Explicit Return Types
  • Function Types
    • Function Type Parentheses
    • Parameter Type Inferences
    • Function Type Aliases
  • More Return Types
    • Void Returns
    • Never Returns
  • Function Overloads
    • Call-Signature Compatibility
  • Summary
• 6. Arrays
  • Array Types
    • Array and Function Types
    • Union-Type Arrays
    • Evolving Any Arrays
    • Multidimensional Arrays
  • Array Members
    • Caveat: Unsound Members
  • Spreads and Rests
    • Spreads
    • Spreading Rest Parameters
  • Tuples
    • Tuple Assignability
      • Tuples as rest parameters
    • Tuple Inferences
      • Explicit tuple types
      • Const asserted tuples
  • Summary
• 7. Interfaces
  • Type Aliases Versus Interfaces
  • Types of Properties
    • Optional Properties
    • Read-Only Properties
    • Functions and Methods
    • Call Signatures
    • Index Signatures
      • Mixing properties and index signatures
      • Numeric index signatures
    • Nested Interfaces
  • Interface Extensions
    • Overridden Properties
    • Extending Multiple Interfaces
  • Interface Merging
    • Member Naming Conflicts
  • Summary
• 8. Classes
  • Class Methods
  • Class Properties
    • Function Properties
    • Initialization Checking
      • Definitely assigned properties
    • Optional Properties
    • Read-Only Properties
  • Classes as Types
  • Classes and Interfaces
    • Implementing Multiple Interfaces
  • Extending a Class
    • Extension Assignability
    • Overridden Constructors
    • Overridden Methods
    • Overridden Properties
  • Abstract Classes
  • Member Visibility
    • Static Field Modifiers
  • Summary
• 9. Type Modifiers
  • Top Types
    • any, Again
    • unknown
  • Type Predicates
  • Type Operators
    • keyof
    • typeof
      • keyof typeof
  • Type Assertions
    • Asserting Caught Error Types
    • Non-Null Assertions
    • Type Assertion Caveats
      • Assertions versus declarations
      • Assertion assignability
  • Const Assertions
    • Literals to Primitives
    • Read-Only Objects
  • Summary
• 10. Generics
  • Generic Functions
    • Explicit Generic Call Types
    • Multiple Function Type Parameters
  • Generic Interfaces
    • Inferred Generic Interface Types
  • Generic Classes
    • Explicit Generic Class Types
    • Extending Generic Classes
    • Implementing Generic Interfaces
    • Method Generics
    • Static Class Generics
  • Generic Type Aliases
    • Generic Discriminated Unions
  • Generic Modifiers
    • Generic Defaults
  • Constrained Generic Types
    • keyof and Constrained Type Parameters
  • Promises
    • Creating Promises
    • Async Functions
  • Using Generics Right
    • The Golden Rule of Generics
    • Generic Naming Conventions
  • Summary
• III. Usage
• 11. Declaration Files
  • Declaration Files
  • Declaring Runtime Values
    • Global Values
    • Global Interface Merging
    • Global Augmentations
  • Built-In Declarations
    • Library Declarations
      • Library targets
    • DOM Declarations
  • Module Declarations
    • Wildcard Module Declarations
  • Package Types
    • declaration
    • Dependency Package Types
    • Exposing Package Types
  • DefinitelyTyped
    • Type Availability
  • Summary
• 12. Using IDE Features
  • Navigating Code
    • Finding Definitions
    • Finding References
    • Finding Implementations
  • Writing Code
    • Completing Names
    • Automatic Import Updates
    • Code Actions
      • Renaming
      • Removing unused code
      • Other quick fixes
      • Refactoring
  • Working Effectively with Errors
    • Language Service Errors
      • Problems tab
      • Running a terminal compiler
      • Understanding types
  • Summary
• 13. Configuration Options
  • tsc Options
    • Pretty Mode
    • Watch Mode
  • TSConfig Files
    • tsc --init
    • CLI Versus Configuration
  • File Inclusions
    • include
    • exclude
  • Alternative Extensions
    • JSX Syntax
      • jsx
      • Generic arrow functions in .tsx files
    • resolveJsonModule
  • Emit
    • outDir
    • target
    • Emitting Declarations
      • emitDeclarationOnly
    • Source Maps
      • sourceMap
      • declarationMap
    • noEmit
  • Type Checking
    • lib
    • skipLibCheck
    • Strict Mode
      • noImplicitAny
      • strictBindCallApply
      • strictFunctionTypes
      • strictNullChecks
      • strictPropertyInitialization
      • useUnknownInCatchVariables
  • Modules
    • module
    • moduleResolution
    • Interoperability with CommonJS
      • esModuleInterop
      • allowSyntheticDefaultImports
    • isolatedModules
  • JavaScript
    • allowJs
    • checkJs
      • @ts-check
    • JSDoc Support
  • Configuration Extensions
    • extends
      • Extending modules
    • Configuration Bases
  • Project References
    • composite
    • references
    • Build Mode
      • Coordinator configurations
      • Build-mode options
  • Summary
• IV. Extra Credit
• 14. Syntax Extensions
  • Class Parameter Properties
  • Experimental Decorators
  • Enums
    • Automatic Numeric Values
    • String-Valued Enums
    • Const Enums
  • Namespaces
    • Namespace Exports
    • Nested Namespaces
    • Namespaces in Type Definitions
    • Prefer Modules Over Namespaces
  • Type-Only Imports and Exports
  • Summary
• 15. Type Operations
  • Mapped Types
    • Mapped Types from Types
      • Mapped types and signatures
    • Changing Modifiers
    • Generic Mapped Types
  • Conditional Types
    • Generic Conditional Types
    • Type Distributivity
    • Inferred Types
    • Mapped Conditional Types
  • never
    • never and Intersections and Unions
    • never and Conditional Types
    • never and Mapped Types
  • Template Literal Types
    • Intrinsic String Manipulation Types
    • Template Literal Keys
    • Remapping Mapped Type Keys
  • Type Operations and Complexity
  • Summary
• Glossary
• Index

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