@feugene/mu/src/object/pathToObject.ts

Helpful TS utilities without dependencies

import isEmpty from '~/is/isEmpty'
import isObject from '~/is/isObject'

export default function pathToObject(
  paths: string = '',
  value: any = null,
  object: Record<PropertyKey, any> = {},
  divider: string = '.',
  replaceOnExist: boolean = true
): Record<PropertyKey, any> {
  if (isEmpty(paths)) {
    return object
  }

  const pathsArray = paths.split(divider),
    pathsCount = pathsArray.length

  let current = object

  for (let i = 0; i < pathsCount; i++) {
    const k = pathsArray[i]

    if (isObject(current)) {
      if (isObject(current[k])) {
        if (pathsCount - 1 === i) {
          current[k] = value
        }
      } else {
        if ((current.hasOwnProperty(k) && replaceOnExist) || !current.hasOwnProperty(k)) {
          current[k] = pathsCount - 1 === i ? value : {}
        }
      }
    }

    current = current[k]
  }

  return object
}