Type Alias StringKeyOf<BaseType>

StringKeyOf: `${Extract<keyof BaseType, string | number>}`

Get keys of the given type as strings.

Number keys are converted to strings.

Use-cases:

Get string keys from a type which may have number keys.
Makes it possible to index using strings retrieved from template types.

Type Parameters

BaseType

Example

import type {StringKeyOf} from 'type-fest';

type Foo = {
	1: number,
	stringKey: string,
};

type StringKeysOfFoo = StringKeyOf<Foo>;
//=> '1' | 'stringKey'