bbo/es/deleted_diff.js

bbo is a utility library of zero dependencies for javascript.

import isObject from './is_object.js';
import './get_tag.js';
import './is_array.js';
import './is_string.js';
import './is_map.js';
import './is_set.js';
import isEmpty from './is_empty.js';
import properObject from './proper_object.js';

var deletedDiff = (lhs, rhs) => {
  if (lhs === rhs || !isObject(lhs) || !isObject(rhs)) return {};
  var l = properObject(lhs);
  var r = properObject(rhs);
  return Object.keys(l).reduce((acc, key) => {
    if (r.hasOwnProperty(key)) {
      var difference = deletedDiff(l[key], r[key]);
      if (isObject(difference) && isEmpty(difference)) return acc;
      return { ...acc,
        [key]: difference
      };
    }

    return { ...acc,
      [key]: undefined
    };
  }, {});
};

export default deletedDiff;