TypeScript Advanced Type Utilities

A comprehensive collection of high-performance TypeScript type utilities focused on type safety and developer experience.

Features

• Zero Runtime Overhead - Pure type definitions
• Type Safety - Advanced constraint utilities
• Modular Design - Import only what you need
• Rich Toolset - From basic to advanced type operations
• IntelliSense Optimized - Great IDE support

Installation

npm install devtypes

Quick Examples

Object Type Manipulation

import { Merge, RequireExactlyOne } from 'devtypes';

type UserBase = { id: number; name: string; email?: string };
type UserAuth = { email: string; password: string };

// Merge types (smart conflict resolution)
type User = Merge< UserBase, UserAuth >;
// { id: number; name: string; email: string; password: string }

// Require exactly one field
type LoginCredentials = RequireExactlyOne<
    { email?: string; phone?: string; username?: string; },
    'email' | 'phone' | 'username'
>;

Deep Utilities

import { DeepPartial, DeepRequired } from 'devtypes';

interface Config {
    server: {
        port: number;
        host: string;
        ssl?: {
            cert: string;
            key: string;
        };
    };
    database: {
        url: string;
        timeout?: number;
    };
}

// Make everything optional
type PartialConfig = DeepPartial< Config >;

// Make everything required
type FullConfig = DeepRequired< Config >;

Documentation

Core Modules

• base - Core type utilities
• collections - Array and object operations
• combinators - Union and tuple operations
• constraints - Property requirement utilities
• functionals - Function type utilities
• primitives - Primitive type helpers
• utils - General type transformations

Performance Tips

Import from specific modules:

// Good
import { Merge } from 'devtypes/types/utils';

// Avoid
import { Merge } from 'devtypes';

License

Copyright 2025 Paul Köhler (komed3).
Distributed under the MIT license.