type-fest
Advanced tools
Package description
The type-fest package provides a collection of essential TypeScript types for use in a wide range of applications. It includes utility types, primitive types, and complex object types to enhance TypeScript's static typing capabilities.
Primitive types
Includes types like LiteralUnion, Primitive, and Promisable, which help with defining literals, primitive values, and promise-like structures.
{"isPrimitive": true}Basic utilities
Provides utility types such as Except, Mutable, ReadonlyDeep, and many others that help manipulate and transform types in various ways.
{"isEmptyArray": array.length === 0}Object types
Contains types for working with objects, such as Merge and RequireAtLeastOne, which assist in merging types and ensuring at least one property is present, respectively.
{"isObjectClean": Object.keys(object).length === 0 && object.constructor === Object}Conditional types
Includes conditional types like ConditionalExcept and ConditionalKeys, which apply conditions to filter keys or properties of types.
{"isTruthy": T extends false | '' | 0 | null | undefined ? false : true}The utility-types package provides a collection of utility types for TypeScript, similar to type-fest. It includes types for operations like picking, omitting, and readonly transformations. It is comparable to type-fest but may have a different set of utilities and slightly different implementations.
ts-essentials offers a wide range of TypeScript types, including deep readonly and writable types, as well as utility types for better type inference. It is similar to type-fest in its goal to enhance TypeScript's type system but may differ in the specific types offered and its API design.
While typesafe-actions is more focused on Redux action creators, it also provides utility types for better type safety in Redux. It is similar to type-fest in that it enhances TypeScript's type system but is more specialized for Redux-related typing.
Readme
Many of the types here should have been built-in.
Either add this package as a dependency or copy-paste the needed types. No credit required.
PR welcome for additional commonly needed types and docs improvements.
$ npm install type-fest
import {Omit} from 'type-fest';
type Foo = {
unicorn: string;
rainbow: boolean;
};
type FooWithoutRainbow = Omit<Foo, 'rainbow'>;
//=> {unicorn: string}
See the types file.
(MIT OR CC0-1.0)
FAQs
A collection of essential TypeScript types
We found that type-fest demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Security News
CISA launched a new project called Vulnrichment to enrich CVEs with details that help prioritize patching and mitigation efforts, as the NVD backlog of unenriched CVEs awaiting analysis surpasses 10,000.
Security News
Socket is joining forces with CISA and other industry leaders at the RSA Conference to sign the Secure by Design pledge, committing to uphold the highest security standards in our products.
Research
The Socket research team breaks down a sampling of malicious packages that download and execute files, among other suspicious behaviors, targeting the popular Discord platform.