What's the best way (most efficient) to turn all the keys of an object to lower case?

Question

I\'ve come up with

function keysToLowerCase (obj) {
  var keys = Object.keys(obj);
  var n = keys.length;
  while (n--) {
    var key = keys[n]; // \"cache\"         


        

Answer 1

Here is easiest solution to convert all the json keys to lower case.

let o = {"Account_Number   ":"0102301", "customer_NaME":"name"}

o = Object.keys(o).reduce((c, k) => (c[k.toLowerCase().trim()] = o[k], c), {})

console.log(o)