typescript utils

class-type.d.ts

export type ClassType<T> = new () => T;

convert-date-to-string.d.ts

type PrimitiveType = string | number | boolean | null | undefined | never | Function;

export type ConvertDateToString<T> =
    T extends Date ? string :
    T extends PrimitiveType ? T :
    T extends Array<infer U> ? Array<ConvertDateToString<U>> :
    { [K in keyof T]: ConvertDateToString<T[K]> };