jsmanifest

Function overloads promise precise type inference, but first-match resolution and order dependency create maintainability traps. This guide shows when overloads clarify intent and when union types deliver better outcomes.

Master TypeScript's declaration merging to type globalThis properties without any. Learn when each pattern breaks, how module context affects global declarations, and better alternatives for most use cases.

TypeScript still does not type exceptions. Learn why @throws JSDoc exists without enforcement, how to build type-safe error handling without language support, and practical patterns for production codebases.