TypeScript function to identify references of everything

id.ts

// check whether the object is the same reference
// from https://stackoverflow.com/a/43963612/1166461
export const id = (() => {
  const useless = typeof (1 as any)
  let currentId = 0
  const map = new WeakMap()

  type ResultType = number|bigint|string|boolean|undefined

  const objId = <T extends object>(obj: T): ResultType => {
    const o = obj as object
    if (!map.has(o)) {
      map.set(o, ++currentId)
    }
    return map.get(o)
  }

  const primitiveId = (obj: number|bigint|string|boolean|undefined): ResultType => obj

  const objectMap = {
    'object': true,
    'function': true,
    'symbol': true,
  }

  return <T extends object>(obj: Parameters<typeof primitiveId>[0] | T): ResultType => {
    const objType = typeof obj
    return objType in objectMap ? objId(obj as unknown as object) : primitiveId(obj as Parameters<typeof primitiveId>[0])
  }
})()