typelevel-ts - npm Package Compare versions

Comparing version 0.3.2 to 0.3.3

CHANGELOG.md

		@@ -16,2 +16,9 @@ # Changelog

		# 0.3.3

		- New Feature
		- add `RequiredKeys` and `OptionalKeys` types, #33 (@saitonakamura)
		- Bug Fix
		- KeysOfType now handles optional keys, fix #34 (@gcanti)

		# 0.3.2
		@@ -18,0 +25,0 @@

lib/index.d.ts

		@@ -15,3 +15,3 @@ /**
		export declare type KeysOfType<A extends object, B> = {
		[K in keyof A]: A[K] extends B ? K : never;
		[K in keyof A]-?: A[K] extends B ? K : never;
		}[keyof A];
		@@ -37,1 +37,17 @@ /**
		export declare type TaggedUnionMember<A extends object, Tag extends keyof A, Value extends A[Tag]> = Extract<A, Record<Tag, Value>>;
		/**
		* Extracts required keys as a literal type union
		*/
		export declare type RequiredKeys<T> = {
		[K in keyof T]: {} extends Pick<T, K> ? never : K;
		} extends {
		[_ in keyof T]: infer U;
		} ? U : never;
		/**
		* Extracts optional keys as a literal type union
		*/
		export declare type OptionalKeys<T> = {
		[K in keyof T]: {} extends Pick<T, K> ? K : never;
		} extends {
		[_ in keyof T]: infer U;
		} ? U : never;

package.json

		{
		"name": "typelevel-ts",
		"version": "0.3.2",
		"version": "0.3.3",
		"description": "Type level programming in TypeScript",
		@@ -5,0 +5,0 @@ "files": [

README.md

		@@ -106,1 +106,11 @@ # TypeScript compatibility
		```

		## RequiredKeys<A extends object> and OptionalKeys<A extends object>

		Extracts required or optional keys as a literal type union

		```ts
		type A = { a: string; b: number; x?: string; y?: number }
		RequiredKeys<A> // "a" \| "b"
		OptionalKeys<A> // "x" \| "y"
		```

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