reduce.js

const j = {a: 1, b: 2, c: { d: 2}, e: { f: { g: 10} } };

function xhamps(obj) {
  const creatNewObj = (obj) => {
    return Object.keys(obj).reduce((r, key) => {
      r[key] = (typeof obj[key] === 'object')? creatNewObj(obj[key]) : obj[key];
      return r;
    },{});

  };
 
  const newData = creatNewObj(obj);
  return newData;
}
console.log(j);

const newXhamps = xhamps(j);

console.log(newXhamps);
newXhamps.a = 100;
newXhamps.e.f.g = 3000;
console.log(newXhamps);

console.log(j);