Proposal: StringKeyof

[younho9]

keyof object could include number type. (It is intended.)

However, sometimes we want to get only string keys. (https://github.com/sindresorhus/type-fest/blob/main/source/get.d.ts#L68-L70)

How about provide StringKeyof type for this use cases?

type StringKeyof<BaseType> = `${Extract<keyof BaseType, string | number>}`

See also:

• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Property_Accessors#property_names

[sindresorhus]

I would argue that you almost always want only the string keys, so this sounds useful indeed.