Building a type-safe dictionary in TypeScript

The article explores various methods for creating type-safe dictionaries in TypeScript, emphasizing the importance of type safety for maintainable code. It discusses the use of JavaScript objects and the Map data structure to store key-value pairs, highlighting their differences and applications. It explains how TypeScript's type-checking features can transform dynamic JavaScript dictionaries into type-safe ones by using indexed object notation, the Record utility type, and TypeScript generics. These techniques allow developers to define dictionaries with pre-declared key-value types, ensuring compile-time error detection when mismatched data types are used. The article also covers advanced techniques like conditional type-checking and iterating through dictionaries using modern JavaScript methods. Ultimately, it provides guidance on selecting the appropriate method for building type-safe dictionaries based on specific use cases and developer preferences.