Advanced Topics

This section covers advanced topics and techniques for using dtsx effectively in complex scenarios.

Type Processing

Learn about dtsx's advanced type processing capabilities:

• Type Processing: Deep dive into how dtsx processes TypeScript types
• Complex Type Inference: Handling nested, recursive, and conditional types
• Type Relationship Tracking: Maintaining type dependencies across files
• Declaration Extraction: Understanding the AST-based extraction process
• Comment Preservation: Advanced comment handling and formatting

Performance & Optimization

Optimize dtsx for large codebases and complex projects:

• Performance: Performance optimization strategies and best practices
• Import Optimization: Advanced techniques for optimizing import statements
• Memory Management: Handling large codebases efficiently with Bun's runtime
• File Processing: Optimizing multi-file processing workflows
• Output Structure: Choosing the right output structure for your needs

Integration & Automation

Integrate dtsx into your development workflow:

• Integration: Build system and CI/CD integration patterns
• Build Tool Integration: Webpack, Vite, Rollup, and other bundler integration
• CI/CD Pipelines: Automated declaration generation in continuous integration
• Package.json Scripts: Effective npm script configurations
• Development Workflows: Hot reloading and watch mode strategies

Troubleshooting & Debugging

Solve common issues and debug complex scenarios:

• Troubleshooting: Common issues and their solutions
• TypeScript Configuration: Isolated declarations and tsconfig.json setup
• Type Resolution: Handling complex type resolution scenarios
• Import/Export Issues: Debugging import and export problems
• Performance Debugging: Identifying and fixing performance bottlenecks

Configuration Patterns

Advanced configuration techniques:

Multi-Package Monorepos

// dts.config.ts
export default {
  entrypoints: [
    'packages/*/src/index.ts',
    'packages/*/src/types.ts'
  ],
  outputStructure: 'mirror',
  clean: true
}

Selective Type Generation

// Generate only specific modules
export default {
  entrypoints: [
    'src/public-api/**/*.ts',
    '!src/internal/**/*.ts'
  ]
}

Custom Output Structures

// Flat structure for libraries
export default {
  outputStructure: 'flat',
  outdir: './types'
}

Best Practices

Type Design

• Use explicit type annotations for public APIs
• Leverage JSDoc comments for comprehensive documentation
• Design types with isolated declarations in mind
• Avoid complex type computations in public interfaces

Project Structure

• Organize types in dedicated files when appropriate
• Use barrel exports for clean public APIs
• Separate internal types from public interfaces
• Maintain consistent naming conventions

Performance

• Use type-only imports when possible
• Minimize circular dependencies
• Consider output structure impact on bundle size
• Enable verbose logging only for debugging

Documentation

• Include comprehensive JSDoc comments
• Use @example tags for usage examples
• Document complex type relationships
• Maintain up-to-date type documentation

Advanced Use Cases

Library Development

Creating type-safe libraries with comprehensive declaration files:

// src/index.ts
/**
 * Main library interface
 * @example
 * const lib = new MyLibrary({ config: true })
 */
export class MyLibrary {
  constructor(options: LibraryOptions) {}
}

export type { LibraryOptions } from './types'

API Client Generation

Generating types for API clients and SDKs:

// Generate types for REST API responses
export interface ApiResponse<T = unknown> {
  data: T
  status: number
  message?: string
}

Plugin Systems

Creating extensible plugin architectures with proper typing:

// Plugin interface with proper type constraints
export interface Plugin<TConfig = Record<string, unknown>> {
  name: string
  config?: TConfig
  initialize(): Promise<void>
}