@mightyplow/jslib/object/merge.js

js helpers library

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

var _slicedToArray = function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"]) _i["return"](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } }; }();

/**
 * Merges too objects deeply.
 *
 * @memberOf object
 * @function
 * @param {Object} targetObject
 * @param {Object[]} objects
 * @return {Object}
 */
var merge = function merge(targetObject) {
    for (var _len = arguments.length, objects = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
        objects[_key - 1] = arguments[_key];
    }

    return objects.reduce(function (targetObject, object) {
        return Object.entries(object).reduce(function (targetObject, _ref) {
            var _ref2 = _slicedToArray(_ref, 2),
                key = _ref2[0],
                value = _ref2[1];

            if (key in targetObject) {
                if (Array.isArray(value)) {
                    targetObject[key] = targetObject[key].concat(value);
                } else if ((typeof value === 'undefined' ? 'undefined' : _typeof(value)) === 'object') {
                    merge(targetObject[key], value);
                } else {
                    targetObject[key] = value;
                }
            } else {
                targetObject[key] = value;
            }

            return targetObject;
        }, targetObject);
    }, targetObject);
};

export default merge;