Dapper is a TypeScript library that enables you to define and generate TypeScript type annotations in string form using a fluent and intuitive API. It provides a simple and expressive way to build complex type structures that mirror your data structures.

To get started with Dapper, install it using npm or yarn:

npm install dapper-typed
# or
yarn add dapper-typed

Here's an example of how you can use Dapper to create TypeScript type annotations in string format:

import { d } from "dapper-typed";

const schemaTypeUser = d.type({
  name: "v1CreateUser",
  fields: {
    name: d.ostring(),
    age: d.integer(),
    email: d.string(),
    password: d.string(),
    address: d.object({
      street: d.string(),
    }).optional(),
  },
}).parse();

console.log(schemaTypeUser);

// Expected output:

// type v1CreateUser = {
//   name?: string;
//   age: number;
//   email: string;
//   password: string;
//   address?: {
//     street: string;
//   };
// };

• Fluent API: Build type annotations using a fluent and easy-to-understand API.
• Nested Types: Define complex nested type structures with ease.
• Optional Fields: Mark fields as optional with the .optional() modifier.
• Built-in Types: Supported built-in types include string, number, boolean, and more.
• Extensible: Easily extend Dapper with custom type builders if needed.
• TypeScript Integration: The generated type annotations can be used directly in TypeScript code.

If you encounter any issues, have questions, or want to contribute to the project, please check out the GitHub repository for Dapper.

Dapper is open-source software licensed under the MIT License. See the LICENSE file for more details.

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