js对象深拷贝

/***对象深拷贝2018-3-2*使用方法deepAssign(obj1,obj2...)**/ ???????//测试//var china = { ???????// ???nation : ‘中国‘, ???????// ???birthplaces:[‘北京‘,‘上海‘,‘广州‘], ???????// ???skincolr :{aa:111,bb:{qq:{hahha:{kkkk:"哈哈哈"}}}}, ???????// ???friends:[‘sk‘,‘ls‘] ??????// } ??????// var result = {name:‘result‘, skincolr :{aa:111,bb:{qq:{hahha:{kkkk:"可以啦啦啦啦"}}}}} ???????//深复制，要想达到深复制就需要用递归 ???????function isObj(x){ ???????????var type = typeof x; ???????????return x !== null && (type === ‘object‘ || type === ‘function‘); ???????} ???????var hasOwnProperty = Object.prototype.hasOwnProperty; ???????var propIsEnumerable = Object.prototype.propertyIsEnumerable; ???????function toObject(val) { ???????????if (val === null || val === undefined) { ???????????????throw new TypeError(‘Cannot convert undefined or null to object‘); ???????????} ???????????return Object(val); ???????} ???????function assignKey(to, from, key) { ???????????var val = from[key]; ???????????if (val === undefined || val === null) { ???????????????return; ???????????} ???????????if (hasOwnProperty.call(to, key)) { ???????????????if (to[key] === undefined || to[key] === null) { ???????????????????throw new TypeError(‘Cannot convert undefined or null to object (‘ + key + ‘)‘); ???????????????} ???????????} ???????????if (!hasOwnProperty.call(to, key) || !isObj(val)) { ???????????????to[key] = val; ???????????} else { ???????????????to[key] = assign(Object(to[key]), from[key]); ???????????} ???????} ???????function assign(to, from) { ???????????if (to === from) { ???????????????return to; ???????????} ???????????from = Object(from); ???????????for (var key in from) { ???????????????if (hasOwnProperty.call(from, key)) { ???????????????????assignKey(to, from, key); ???????????????} ???????????} ???????????if (Object.getOwnPropertySymbols) { ???????????????var symbols = Object.getOwnPropertySymbols(from); ???????????????for (var i = 0; i < symbols.length; i++) { ???????????????????if (propIsEnumerable.call(from, symbols[i])) { ???????????????????????assignKey(to, from, symbols[i]); ???????????????????} ???????????????} ???????????} ???????????return to; ???????} ???????function deepAssign(target) { ???????????target = toObject(target); ???????????for (var s = 1; s < arguments.length; s++) { ???????????????assign(target, arguments[s]); ???????????} ???????????return target; ???????}; ??????// deepAssign(china,result)//console.log(china)