typeclone

Deeply expands TypeScript types into their own declaration file.

Installation

Available as a npm package.

For usage from code:

npm install --save-dev typeclone

For usage from the command line:

npm install --global typeclone

Usage

Available both as a command-line utility and a TypeScript module. Gets all types in the input file, expands them, and then outputs them in a separate file. Useful for getting rid of dependencies when exporting inferred types.

For example, take this input file named demo.ts

import { z } from "zod";

const demoSchema = z.object({
    test: z.string(),
    test2: z.number().nullable().optional(),
});

export type Demo = z.infer<typeof demoSchema>;

We can now call either the command-line utility:

typeclone demo.ts demo_out.d.ts

Or the JavaScript function:

import { cloneTypes } from "typeclone";

cloneTypes('demo.ts', 'demo_out.d.ts')

Which will result in the output file demo_out.d.ts with the following contents:

export declare type Demo = { test: string; test2?: number | null | undefined; }

Can output both .ts and .d.ts files, automatically detects which one based on the output file extension.

License

Made by Marko Calasan, 2023.

This product is licensed under the MIT License.