Sort JSON structure by keys recursevely

sortJsonByKeys.js

function sortJsonByKeys (json) {
   let out = {}
   let keys = Object.keys(json)
   keys.sort()
   keys.forEach((key) => {
     if (typeof json[key] === 'object') {
       out[key] = sortJsonByKeys(json[key])
     } else {
       out[key] = json[key]
     }
   })

   return out
}