a function to delete all unnecessary nested, or void data in a json recursivly

cleanObject.js

const isPlainObject = require('lodash/isPlainObject')
const isString = require('lodash/isString')
const isNumber = require('lodash/isNumber')
const map = require('lodash/map')
const reduce = require('lodash/reduce')

function cleanObject (obj = {}) {
  if (isNumber(obj)) return obj
  if (isString(obj)) {
    return (obj.trim().length === 0) ? null : obj
  }
  if (Array.isArray(obj)) {
    if (obj.length === 0) return null
    if (obj.length === 1) {
      if (isString(obj[0])) {
        return (obj[0] === '')
        ? null
        : obj[0]
      } else {
        return cleanObject(obj[0])
      }
    }
    return map(obj, cleanObject)
  } else if (isPlainObject(obj)) {
    return reduce(obj, (acum, value, key) => {
      return {
        ...acum,
        [key]: cleanObject(value)
      }
    }, {})
  }
}

/*
Example
turns this:
{
  a: '',
  b: 'string',
  c: 123,
  d: ['']
  e: [
    {
      key: 'val',
      blank: '',
      nothing: ['']
    }
  ],
  f: [
    {
      aa: 'aa',
      bb: 'bb'
    },
    {
      aaa: 'aaa',
      bbb: 'bbb'
    }
  ] 
  
}

Into this:
{
  a: null,
  b: 'string',
  c: 123,
  d: null
  e: {
      key: 'val',
      blank: null,
      nothing: null
  },
  f: [
    {
      aa: 'aa',
      bb: 'bb'
    },
    {
      aaa: 'aaa',
      bbb: 'bbb'
    }
  ] 
}
*/