Deprecated

typescript-json has been renamed to typia

Typia

// RUNTIME VALIDATORS
export function is<T>(input: unknown): input is T; // returns boolean
export function assert<T>(input: unknown): T; // throws TypeGuardError
export function assertGuard<T>(input: unknown): asserts input is T;
export function validate<T>(input: unknown): IValidation<T>; // detailed

// JSON FUNCTIONS
export namespace json {
    export function application<T>(): IJsonApplication; // JSON schema
    export function assertParse<T>(input: string): T; // type safe parser
    export function assertStringify<T>(input: T): string; // safe and faster
}

// PROTOCOL BUFFER
export namespace protobuf {
    export function message<T>(): string; // Protocol Buffer message
    export function assertDecode<T>(buffer: Uint8Array): T; // safe decoder
    export function assertEncode<T>(input: T): Uint8Array; // safe encoder
}

// RANDOM GENERATOR
export function random<T>(g?: Partial<IRandomGenerator>): T;

Typia is a transformer library supporting below features:

• Super-fast Runtime Validators
• Enhanced JSON functions
• Protocol Buffer encoder and decoder
• Random data generator

Note

• Only one line required, with pure TypeScript type
• Runtime validator is 20,000x faster than class-validator
• JSON serialization is 200x faster than class-transformer

Sponsors

Thanks for your support.

Your donation encourages typia development.

Playground

You can experience how typia works by playground website:

• 💻 https://typia.io/playground

Guide Documents

Check out the document in the website:

🏠 Home

• Introduction
• Setup
• Pure TypeScript

📖 Features

• Runtime Validators
  • assert() function
  • is() function
  • validate() function
  • Functional Module
  • Special Tags
• Enhanced JSON
  • JSON Schema
  • stringify() functions
  • parse() functions
• Protocol Buffer
  • Message Schema
  • decode() functions
  • encode() functions
• Random Generator
• Miscellaneous

🔗 Appendix

• Utillization Cases
  • NestJS
  • Prisma
  • tRPC
• ⇲ Benchmark Result
• ⇲ dev.to Articles