Three Ways to Convert JSON to TypeScript. Only One Is Deterministic.

The article discusses the process of generating TypeScript types from JSON responses, focusing on three approaches: manual typing, using Large Language Models (LLMs), and deterministic conversion. The key points are:

1. Manual Typing:

   • Involves writing TypeScript interfaces by hand.
   • Pros: Full control over type definitions.
   • Cons: Time-consuming and error-prone, especially for complex JSON structures.

2. Using LLMs (Large Language Models):

   • Tools like chatbots or online converters that generate types based on natural language input.
   • Pros: Faster than manual typing.
   • Cons: Inconsistent results due to the probabilistic nature of AI-generated code; may require significant editing and validation.

3. Deterministic Conversion:

   • A tool that converts JSON directly into TypeScript interfaces without randomness or guesswork.
   • Pros: Fast, consistent, and always correct for the provided sample data.
   • Cons: Requires manual refinement for optional fields, string enums, date parsing, etc., but these adjustments are straightforward.

Key Benefits of Deterministic Conversion:

• Speed: Quick generation of TypeScript interfaces from JSON.
• Correctness: Ensures that types match the provided JSON sample

Read the full article at DEV Community

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