Utility Types

Utility Types - transform complex TypeScript… | Awesome Repos

Features

Recursive Mapped Types - Provides a toolkit for recursively applying property constraints across deeply nested object structures.
Recursive Property Transformations - Enables recursive modification of properties in deep object structures to change mutability or requirement status.
Object Type Transformations - Recursively applies property constraints like read-only or required status to nested object structures.
Recursive Object Type Transformers - Provides a toolkit for applying property constraints like read-only or optional status to deeply nested object structures.
Conditional Types - Provides type-level decision systems to select types based on evaluated conditions.
Static Type Metadata Extractors - Retrieves constructor, return, and promise resolution types from classes and functions.
Union Type Transformations - Provides utilities for manipulating, filtering, and aggregating properties across union types.
Union Member Filtering - Includes utilities for filtering and transforming individual members of union types.
Union Set Operations - Computes mathematical set-like operations such as differences and intersections between union types.
TypeScript Advanced Type Features - Implements advanced TypeScript features including generics, conditional types, and mapped types for strong type safety.
Mapped Type Transformations - Implements mapped type transformations for iterating over keys to reconstruct type structures.
Type Intersection and Merging - Provides capabilities for combining multiple type definitions into a single composite structure.
Branded Types - Implements branded types to distinguish between identical object structures using unique labels.
Type-Level - Changes properties or nested structures to be either read-only or mutable via utility types.
Asynchronous Type Extraction - Extracts the resolution type of a Promise at the type level.
Constructor Extraction - Retrieves the constructor type of a class by analyzing the type of its instances.
Object Key Extractors - Retrieves a union of object keys based on criteria like value type or mutability.
Object Property Transformers - Provides utilities for filtering specific properties from objects at the type level.
Shape Comparisons - Computes intersections and differences between two object types to identify shared or unique properties.
Template Literal Types - Uses template literal types to generate and transform property keys at the type level.
Union to Intersection Converters - Transforms a union type into an intersection type composed of all its constituent members.
Element Type Extraction - Derives a union of all value types contained within an object, tuple, or array.
Type Utilities - Collection of utility types for common development patterns.

Open-source alternatives to Utility Types

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ts-toolbelt is a collection of specialized utilities for manipulating and validating TypeScript types. It provides a toolkit for performing complex transformations on objects, unions, and functions to enforce strict data consistency at compile time. The library features dedicated transformers for function types, including utilities for currying, composition, and signature extraction. It also includes an object type manipulator for deep merging, patching, and reshaping complex structures. The capability surface extends to literal string processing, type-level arithmetic, and tuple operations.
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type-fest is a library of reusable utility types for performing complex transformations and validations on objects, arrays, strings, and numeric ranges in TypeScript. It provides a collection of type definitions designed to handle advanced structural changes and constraints. The project distinguishes itself by offering specialized logic for string literal processing, such as casing transformations and pattern-based modifications, and type-level arithmetic for calculating numeric ranges and absolute values. It also includes utilities for enforcing deep immutability, ensuring union mutual exclu
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This project is a comprehensive guide and educational resource for the TypeScript language. It covers the fundamental principles of the language, including its structural type system, static type analysis, and the process of transpiling typed source files into JavaScript. The material details how to model complex data and reusable type logic using generics, conditional types, and mapped types. It also explains the use of declaration files to provide type safety for external JavaScript libraries and the integration of type checking into existing JavaScript projects via JSDoc annotations. The
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arktypeio/arktype
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Arktype is a TypeScript runtime validation library and schema orchestrator. It synchronizes TypeScript types with runtime data validation, allowing users to define type-safe schemas that ensure unknown data adheres to specific structures during application execution. The project distinguishes itself by using set-theory type analysis to determine intersections and subtype compatibility, alongside JIT-compiled validation functions for optimized performance. It supports advanced type modeling through branded type constraints, recursive alias resolution, and the ability to generate runtime valida
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See all 30 alternatives to Utility Types

piotrwitekutility-types

Features

Open-source alternatives to Utility Types

millsp/ts-toolbelt

sindresorhus/type-fest

microsoft/TypeScript-Handbook

arktypeio/arktype

Star history

Open-source alternatives to Utility Types

millsp/ts-toolbelt

sindresorhus/type-fest

microsoft/TypeScript-Handbook

arktypeio/arktype