Flatten an object to a single depth

flattenObject.js

/*
 * @fileoverview Flatten an object to a single layer deep
 * @author Muthukrishnan (https://stackoverflow.com/users/1173436/muthukrishnan)
 * @url https://stackoverflow.com/a/53739792
*/
function flattenObject (ob) {
  const toReturn = {};

  for (const i in ob) {
    if (!ob.hasOwnProperty(i)) continue;

    if ((typeof ob[i]) == 'object' && ob[i] !== null) {
      const flatObject = flattenObject(ob[i]);
      for (const x in flatObject) {
        if (!flatObject.hasOwnProperty(x)) continue;

        toReturn[i + '.' + x] = flatObject[x];
      }
    } else {
      toReturn[i] = ob[i];
    }
  }
  return toReturn;
}