object-casing is a package that walks throught an object using a callback function to convert the object key, returning a new object with new keys.
npm i -S object-casingimport * as camelCase from 'lodash.camelcase'
import * as snakeCase from 'lodash.snakecase'
import { caseKeys } from 'object-casing'
const dbData = {
  id: 1,
  first_name: 'some name',
  last_name: 'last',
  created_at: new Date(),
}
const obj = caseKeys(dbData, camelCase)
/*
obj = {
  id: 1,
  firstName: 'some name',
  lastName: 'last',
  createdAt: new Date(),
}
*/
const objToDb = caseKeys(obj, snakeCase)
/*
objToDb = {
  id: 1,
  first_name: 'some name',
  last_name: 'last',
  created_at: new Date(),
}
*/