deep clone

deepclone.js

function deepClone(o) {
    return (typeof o !== 'object' || o === null) ? o
         : (o instanceof Array)                  ? o.map(deepClone)
         : Object.keys(o).reduce(function (result, key) {
               result[key] = deepClone(o[key])
               return result
           }, Object.create(Object.getPrototypeOf(o))) }