63 lines
1.3 KiB
JavaScript
63 lines
1.3 KiB
JavaScript
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/*!
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* merge-deep <https://github.com/jonschlinkert/merge-deep>
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*
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* Copyright (c) 2014-2015, Jon Schlinkert.
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* Licensed under the MIT License.
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*/
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'use strict';
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var union = require('arr-union');
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var clone = require('clone-deep');
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var typeOf = require('kind-of');
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module.exports = function mergeDeep(orig, objects) {
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if (!isObject(orig) && !Array.isArray(orig)) {
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orig = {};
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}
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var target = clone(orig);
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var len = arguments.length;
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var idx = 0;
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while (++idx < len) {
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var val = arguments[idx];
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if (isObject(val) || Array.isArray(val)) {
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merge(target, val);
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}
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}
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return target;
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};
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function merge(target, obj) {
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for (var key in obj) {
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if (!isValidKey(key) || !hasOwn(obj, key)) {
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continue;
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}
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var oldVal = obj[key];
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var newVal = target[key];
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if (isObject(newVal) && isObject(oldVal)) {
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target[key] = merge(newVal, oldVal);
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} else if (Array.isArray(newVal)) {
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target[key] = union([], newVal, oldVal);
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} else {
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target[key] = clone(oldVal);
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}
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}
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return target;
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}
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function hasOwn(obj, key) {
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return Object.prototype.hasOwnProperty.call(obj, key);
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}
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function isObject(val) {
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return typeOf(val) === 'object' || typeOf(val) === 'function';
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}
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function isValidKey(key) {
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return key !== '__proto__' && key !== 'constructor' && key !== 'prototype';
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}
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