What are the best practices for using TypeScript JSON Schema?

What are the best practices for using TypeScript JSON Schema?

When using TypeScript JSON Schema, it's important to ensure your schemas are well-defined and maintainable. Here are some best practices:

1. Use TypeScript Types: Leverage TypeScript types to generate schemas automatically.
2. Keep Schemas DRY: Avoid duplication by reusing schemas where possible.
3. Validate Your Schemas: Always validate your JSON against the schema to catch errors early.
4. Document Your Schemas: Provide clear documentation for each schema to help other developers understand their purpose.

Can you explain how to generate JSON Schema from TypeScript types?

Certainly! You can use libraries like typescript-json-schema to generate JSON Schema from your TypeScript types. Here's a basic example:

1. Install the library: npm install typescript-json-schema
2. Create a TypeScript file with your types.
3. Run the command: typescript-json-schema yourFile.ts YourTypeName to generate the schema.

What tools can help with validating JSON against a schema?

There are several tools you can use to validate JSON against a schema, including:

1. Ajv: A fast JSON Schema validator.
2. Joi: A powerful schema description language and data validator for JavaScript.
3. Zod: A TypeScript-first schema declaration and validation library.

Are there any common pitfalls to avoid when working with JSON Schema?

Yes, some common pitfalls include:

1. Overly Complex Schemas: Keep schemas simple to avoid confusion.
2. Ignoring Type Safety: Ensure your TypeScript types align with your JSON Schema.
3. Not Testing Schemas: Always test your schemas with various data inputs to ensure they work as expected.