typesafeOmit.ts

type Omit = <T extends object, K extends Array<keyof T>>(
  obj: T,
  keys: K
) => { [K2 in Exclude<keyof T, K[number]>]: T[K2] }

/**
 * Removes entries from an object based on a list of keys
 */
export const omit: Omit = (obj, keys) => {
  const next = {} as { [K in keyof typeof obj]: (typeof obj)[K] }
  let key: keyof typeof obj

  for (key in obj) {
    if (!keys.includes(key)) {
      next[key] = obj[key]
    }
  }

  return next
}