Allow SetRequired to specify internal properties (aka optic)
15
👍
2Assuming we have
type FormValue = {
person: {
city?: string;
}
}SetRequired do not allow creation of FormValuee with city set as required. I belive it can be done with template literal types,
eg
type DeepKeyOf<T> = (
[T] extends [never] ? "" :
T extends object ? (
{ [K in Exclude<keyof T, symbol>]:
`${K}${undefined extends T[K] ? "?" : ""}${DotPrefix<DeepKeyOf<T[K]>>}` }[
Exclude<keyof T, symbol>]
) : ""
) extends infer D ? Extract<D, string> : never;
type DotPrefix<T extends string> = T extends "" ? "" : `.${T}`;
sindresorhus / type-fest
A collection of essential TypeScript types
14.5k
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