ObjectInvert

Since v1.3.0

Invert an object type by swapping its keys and values. The resulting object uses the original values as keys and the original keys as values.

Signature

export type ObjectInvert<T extends Record<string, string | number>> = {
	[K in T[keyof T]]: { [P in keyof T]: T[P] extends K ? P : never }[keyof T]
}

Parameters

Parameter	Description
T	The source object type with string or number values

Examples

Basic Usage

import type { ObjectInvert } from 'uni-types'

type Roles = { admin: 'a'; editor: 'e'; viewer: 'v' }
type InvertedRoles = ObjectInvert<Roles>
// { a: 'admin'; e: 'editor'; v: 'viewer' }

With Numeric Values

import type { ObjectInvert } from 'uni-types'

type StatusCodes = { ok: 200; notFound: 404; error: 500 }
type CodeToName = ObjectInvert<StatusCodes>
// { 200: 'ok'; 404: 'notFound'; 500: 'error' }