askirmas / react-classnaming

import { ClassValue } from "../defs"

export {}

// type Excluder<

//   S extends Record<string, ClassValue>,

//   E extends {[K in keyof S]?: ClassValue}

// > = { [P in Exclude<keyof S, keyof E>]: S[P]; }

// interface Exclusion<

//   S extends Record<string, ClassValue>

// > {

//   (source: S, ex: {[K in keyof S]?: ClassValue}): Excluder<S, typeof ex>

// }

function exclusion<

  E extends Record<string, ClassValue>,

  S extends E

  // S extends Record<string, ClassValue>,

  // E extends {[K in keyof S]?: ClassValue}

>(

  source: S, ex: E

): { [P in Exclude<keyof S, keyof E>]: S[P]; }

{

  const $return = {...source}

  for (const k in ex) {

    delete $return[k]

  }

  return $return

}

const source: Record<"a"|"b"|"c"|"d", ClassValue> = {a: "a", b: undefined, c: "c", d: undefined}

, p1: Record<"a"|"b", ClassValue> = {a: "a", b: undefined}

, p2: Record<"c", ClassValue> = {"c": undefined}

const step1 = exclusion(source, p1)

, step2 = exclusion(step1, p2)

export {step2}