Lodash / Underscore sort object keys. Like _.sortBy(), but on keys instead of values, returning an object, not an array. Defaults to alphanumeric sort.

example.js

var obj = {b: 3, c: 2, a: 1};

_.sortKeysBy(obj);
// {a: 1, b: 3, c: 2}

_.sortKeysBy(obj, function (value, key) {
    return value;
});
// {a: 1, c: 2, b: 3}

sortKeysBy.js

_.mixin({
    'sortKeysBy': function (obj, comparator) {
        var keys = _.sortBy(_.keys(obj), function (key) {
            return comparator ? comparator(obj[key], key) : key;
        });
    
        return _.object(keys, _.map(keys, function (key) {
            return obj[key];
        }));
    }
});

Small variation that works with nested objects as well:

const sortByKeys = object => {
  const keys = Object.keys(object);
  const sortedKeys = _.sortBy(keys);

  return _.fromPairs(
    _.map(sortedKeys, key => {
      let value = object[key];
      if (typeof object[key] === "object" && !(object[key] instanceof Array)) {
        value = sortByKeys(value);
      }
      return [key, value];
    })
  );
};