A TypeScript library for handling results and errors in a functional programming style.

NPM:

npm install @resulted/results
yarn add @resulted/results
pnpm add @resulted/results

JSR:

deno add jsr:@resulted/results
pnpm add jsr:@resulted/results

import { Result } from '@resulted/results';

function divide(a: number, b: number): Result<number, 'ZeroDivisionError'> {
    if (b === 0) {
        return Result.err('ZeroDivisionError');
    }
    return Result.ok(a / b);
}

function doMath(): Result<number, 'DivisionError'> {
    const randomNum = Math.floor(Math.random() * 10);
    return divide(10, randomNum).mapErr(() => 'DivisionError');
}

function main() {
    const result = doMath();
    if (result.isOk()) {
        console.log('Result:', result.value);
    } else {
        console.error('Error:', result.error);
    }
}

Contributions are welcome! This project uses pnpm as its package manager.

git clone https://github.com/resulted-io/results.git
cd results
pnpm install

• pnpm run build: Build CJS and ESM outputs
• pnpm run typecheck: Run TypeScript type checking
• pnpm run lint: Run Biome linter
• pnpm run format: Auto-fix lint and formatting issues

1. Fork the repository and create a feature branch.
2. Make your changes and ensure pnpm run lint and pnpm run typecheck pass.
3. Open a pull request with a clear description of your changes.

This project is licensed under the ISC License. See LICENSE.md for details.