hotypes

Higher-order types for TypeScript in the real world.

hotypes contains these types:

• A new type is a modified type from another type.
• A new type is an operator or a function.
• A new type is an internal type extractor.

Install

npm install --save hotypes
# or
yarn add hotypes

API

• Equals
• Head
• Last
• Tail
• Flatten
• FlattenDeep
• FunctionKeys
• NonNullableKeys
• NullableKeys
• OptionalKeys
• KeysByType
• KeysByExactType
• KeysExcludeByType
• KeysExcludeByExactType
• MapAllProps
• MapPropsByKey
• MapPropsByType
• MapPropsByExactType
• MapNullablePropsToOptionalNullable
• MapNullablePropsToOptional
• MapPropsToRequiredByKey
• MapPropsToOptionalByKey
• MapPropsToNonNullable
• Mixin
• MixinAll
• PickNonNever
• Pop
• PropByPath
• OmitPropsByType
• OmitPropsByExactType
• Replace
• ReplacePropsByKey
• ReplacePropsByType
• WithDefault
• NonCallable
• ReturnTypeOfConstructor
• ParametersOfConstructor
• UnpackedArray
• UnpackedArrayLike
• UnpackedIterable
• UnpackedAsyncIterable
• UnpackedPromise
• UnpackedPromiseLike
• ToStruct
• Prettify

The Unpacked prefix comes from this official article

Changelog

All notable changes to this project will be documented in this file. See standard-version for commit guidelines.

0.6.5 (2025-07-03)

Features

• add ToType, Prettify (e38db3c)

0.6.4 (2023-10-02)

Features

• add ParametersOfConstructor (f5e3bed)

0.6.3 (2023-07-14)

Features

• add PropByPath (de43746)

0.6.2 (2023-06-11)

Bug Fixes

• export src (6560d08)

0.6.1 (2023-03-19)

Features

• add Pop (ea0bf9a)

0.6.0 (2023-02-15)

⚠ BREAKING CHANGES

• Renamed MapPropsToNonOptionalByKey to MapPropsToRequiredByKey

• rename MapPropsToNonOptionalByKey to MapPropsToRequiredByKey (f49eb5c)

0.5.1 (2022-11-12)

Features

• add Flatten, FlattenDeep (d3e0916)

0.5.0 (2022-09-13)

⚠ BREAKING CHANGES

• Removed ReturnTypeOfConstructor
• Renamed MapPropsExtendType to MapPropsByType
• Renamed MapPropsByType to MapPropsByExactType
• Renamed ReplaceAllProps to MapAllProps
• Renamed ReplaceType to Replace
• Renamed OmitPropsExtendType to OmitPropsByType
• Renamed OmitPropsByType to OmitPropsByExactType
• Renamed KeysExcludeExtendType to KeysExcludeByType
• Renamed KeysExcludeByType to KeysExcludeByExactType
• Renamed KeysExtendType to KeysByType
• Renamed KeysByType to KeysByExactType
• Renamed MapPropsByKeyToOptional to MapPropsToOptionalByKey
• Renamed MapPropsByKeyToNonOptional to MapPropsToNonOptionalByKey

Features

• add types from justypes@2 (d860c31)

• remove ReturnTypeOfConstructor (97c2619)
• rename KeysByType to KeysByExactType (a70cfd7)
• rename KeysExcludeByType to KeysExcludeByExactType (a651549)
• rename KeysExcludeExtendType to KeysExcludeByType (f7911b0)
• rename KeysExtendType to KeysByType (e6dbeaa)
• rename MapPropsByKeyToNonOptional to MapPropsToNonOptionalByKey (46ee6bb)
• rename MapPropsByKeyToOptional to MapPropsToOptionalByKey (b20333e)
• rename MapPropsByType to MapPropsByExactType (4033860)
• rename MapPropsExtendType to MapPropsByType (acdfafd)
• rename OmitPropsByType to OmitPropsByExactType (11298ae)
• rename OmitPropsExtendType to OmitPropsByType (4fc6c18)
• rename ReplaceAllProps to MapAllProps (3f542c3)
• rename ReplaceType to Replace (3e0f507)

0.4.8 (2022-08-31)

Features

• add NonCallable (1e6ffe1)

0.4.7 (2022-08-24)

Features

• add MixinAll (4ad9342)

0.4.6 (2022-08-18)

Features

• add MapProps (a47ddbf)

0.4.5 (2022-08-01)

0.4.4 (2022-03-20)

0.4.3 (2021-11-18)

Features

• improve KeysExtendType (89bfbcd)

0.4.2 (2021-08-10)

Features

• add Mixin (324a979)

0.4.1 (2021-08-10)

Features

• add MapPropsByKey, ReplacePropsByKey (9ae1466)

0.4.0 (2021-07-03)

⚠ BREAKING CHANGES

• move a batch of types to justypes

Features

• move a batch of types to justypes (c1e5c68)

0.3.3 (2021-06-25)

Features

• add OmitPropsByType, OmitPropsExtendType (2fa95f5)

0.3.2 (2021-06-22)

Features

• add MapNullablePropsToOptionalNullable (0d052a1)

0.3.1 (2021-06-22)

0.3.0 (2021-06-22)

⚠ BREAKING CHANGES

• rename MapPropsExtendTypeToOptional to MapPropsByKeyToOptional

• rename MapPropsExtendTypeToOptional to MapPropsByKeyToOptional (f08998c)

0.2.3 (2021-06-20)

Features

• add ReplacePropsByType (adaa1ad)
• add ReplaceType (34ce004)

0.2.2 (2021-05-22)

Bug Fixes

• script (aad2e72)

0.2.1 (2021-05-16)

Features

• add UnpackedAsyncIterable, UnpackedIterable (5c6da42)

0.2.0 (2021-05-07)

⚠ BREAKING CHANGES

• rename RequiredKeys => MapPropsByKeyToNonOptional
• rename MapNullablePropsToOptionalProps => MapNullablePropsToOptional
• rename MapPropsExtendTypeToPartial => MapPropsExtendTypeToOptional
• rename PartialKeys => MapPropsExtendTypeToPartial
• rename ConstructorReturnType => ReturnTypeOfConstructor
• rename ExcludeKeysExtendType => KeysExcludeExtendType
• rename ExcludeKeysByType => KeysExcludeByType
• rename GetKeysExtendType => KeysExtendType
• rename GetKeysByType => KeysByType
• rename GetFunctionKeys => FunctionKeys
• rename MapProps => MapPropsExtendType
• rename MapPropsStrict => MapPropsByType
• rename MapNullablePropsToNonNullableProps => MapPropsToNonNullable
• rename Keys => GetKeysExtendType
• rename FunctionKeys => GetFunctionKeys
• rename ExcludeNullable => NonNullable
• rename ExcludeKeys => ExcludeKeysExtendType
• rename ExcludeKeysStrict => ExcludeKeysByType
• rename KeysStrict => GetKeysByType

Bug Fixes

• filenames (b594e15)
• type MapNullablePropsToOptional (fffdbd8)
• type OptinalKeys (9c36904)

• rename ConstructorReturnType => ReturnTypeOfConstructor (00336b1)
• rename ExcludeKeys => ExcludeKeysExtendType (2e1bb5f)
• rename ExcludeKeysByType => KeysExcludeByType (94fb347)
• rename ExcludeKeysExtendType => KeysExcludeExtendType (3ece321)
• rename ExcludeKeysStrict => ExcludeKeysByType (4a34407)
• rename ExcludeNullable => NonNullable (cfb3b7c)
• rename FunctionKeys => GetFunctionKeys (4798f98)
• rename GetFunctionKeys => FunctionKeys (eedca79)
• rename GetKeysByType => KeysByType (a4d37eb)
• rename GetKeysExtendType => KeysExtendType (41e277e)
• rename Keys => GetKeysExtendType (f7c93ee)
• rename KeysStrict => GetKeysByType (6101a08)
• rename MapNullablePropsToNonNullableProps => MapPropsToNonNullable (e371106)
• rename MapNullablePropsToOptionalProps => MapNullablePropsToOptional (5658780)
• rename MapProps => MapPropsExtendType (b55a062)
• rename MapPropsExtendTypeToPartial => MapPropsExtendTypeToOptional (c1aa1c1)
• rename MapPropsStrict => MapPropsByType (c38c31b)
• rename PartialKeys => MapPropsExtendTypeToPartial (7b66e82)
• rename RequiredKeys => MapPropsByKeyToNonOptional (9098cf8)

0.1.9 (2021-04-25)

Features

• add RequiredKeys (f838f43)

0.1.8 (2021-04-25)

Features

• improve PartialKeys (7c727c5)

0.1.7 (2021-04-25)

Features

• improve PartialKeys (ef60fd2)

0.1.6 (2021-04-25)

Features

• add PartialKeys (a8deda3)

0.1.5 (2021-04-20)

Features

• add Dictionary (da93343)

0.1.4 (2021-03-17)

Bug Fixes

• fix FunctionKeys (ecb2c84)

0.1.3 (2021-03-17)

Features

• add WithDefault (af164a3)

0.1.2 (2021-03-17)

Bug Fixes

• entry (a1bd948)

0.1.1 (2021-03-17)

Bug Fixes

• build (bc62f15)

0.1.0 (2021-03-17)

⚠ BREAKING CHANGES

• remove Json

Features

• add Last (4407fb1)
• add Tail (757820d)
• init (197af85)
• move Json to justypes (7f408b5)
• rename First to Head (dee1531)