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TypeScript Decorator Patterns

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by Community

Covers TypeScript decorators including class, method, property, and parameter decorators. Shows practical patterns for logging, validation, caching, and dependency injection using both legacy and TC39 decorators.

typescriptdecoratorsmetaprogrammingpatternsclasses

TypeScript Decorator Patterns

Use TypeScript decorators for clean metaprogramming and cross-cutting concerns.

Usage

Describe the cross-cutting concern you want to implement and get decorator-based solutions.

Examples

  • "Create a logging decorator for class methods"
  • "Build a caching decorator with TTL support"
  • "How do the new TC39 decorators differ from legacy decorators?"

Guidelines

  • Cover both legacy (experimentalDecorators) and TC39 stage 3 decorators
  • Show decorator factories for configurable decorators
  • Include common patterns: logging, caching, validation, retry
  • Explain decorator execution order and composition
  • Cover reflect-metadata for runtime type information

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Model complex state with discriminated union types.

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TypeScript Template Literals

Create powerful string types with template literal types.

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Create nominal types in TypeScript with branding patterns.