1、将对象转换为JSON字符串形式，再将其转换为原生JS对象；

//_tmp和result是相互独立的，没有任何联系，有各自的存储空间。let deepClone = function (obj) { let _tmp = JSON.stringify(obj);//将对象转换为json字符串形式 let result = JSON.parse(_tmp);//将转换而来的字符串转换为原生js对象 return result;};let obj1 = { weiqiujaun: { age: 20, class: 1502 }, liuxiaotian: { age: 21, class: 1501 }};let test = deepClone(obj1);console.log(test);

2、使用JS中的for循环实现遍历和复制；

function deepClone(obj) { let result = typeof obj.splice === "function" ? [] : {}; if (obj && typeof obj === 'object') { for (let key in obj) { if (obj[key] && typeof obj[key] === 'object') { result[key] = deepClone(obj[key]);//如果对象的属性值为object的时候，递归调用deepClone,即在吧某个值对象复制一份到新的对象的对应值中。 } else { result[key] = obj[key];//如果对象的属性值不为object的时候，直接复制参数对象的每一个键值到新的对象对应的键值对中。 } } return result; } return obj;}let testArray = ["a", "b", "c", "d"];let testRes = deepClone(testArray);console.log(testRes);console.log(typeof testRes[1]);let testObj = { name: "weiqiujuan", sex: "girl", age: 22, favorite: "play", family: {brother: "son", mother: "haha", father: "heihei"}};let testRes2 = deepClone(testObj);testRes2.family.brother = "weibo";console.log(testRes2);

3、利用数组的“Array.prototype.forEach”方法进行复制即可实现深拷贝。

let deepClone = function (obj) { let copy = Object.create(Object.getPrototypeOf(obj)); let propNames = Object.getOwnPropertyNames(obj); propNames.forEach(function (items) { let item = Object.getOwnPropertyDescriptor(obj, items); Object.defineProperty(copy, items, item); }); return copy;};let testObj = { name: "weiqiujuan", sex: "girl", age: 22, favorite: "play", family: {brother: "wei", mother: "haha", father: "heihei"}}let testRes2 = deepClone(testObj);console.log(testRes2);

以上就是JS 深拷贝的三种实现方式的详细内容，更多请关注亿速云其它相关文章！