const copiedCounter=originalCounter.copy() console.log(originalCounter.count)//5console.log(copiedCounter.count)//5copiedCounter.count = 7console.log(originalCounter.count)//5console.log(copiedCounter.count)//7 如果实例中有其它对象的引用,就要在copy方法中使用 JSON.stringify 和 JSON.parse 。 除此...
copy = Object.create(Object.getPrototypeOf(obj));hash.set(obj, copy);for (let key in obj) {...
For a long time, you had to resort to workarounds and libraries to create deep copies of JavaScript values. Now js providesstructuredClone()a built-in function for deep copying. Browser Support: shallow copy Copying a value in JavaScript is almost a shallow copy, not a deep copy. This me...
1)寻常递归 var deepCopy = function(o) { if (o instanceof Array) { //先判断Array var n = []; for (var i = 0; i < o.length; ++i) { n[i] = deepCopy(o[i]); } return n; } else if (o instanceof Object) { var n = {} for (var i in o) { n[i] = deepCopy(o...
您可以直接把 源码 或 构建后 的包拷贝到您的项目中去;然后使用如下代码在您的项目中引入deepCopy: import{deepCopy}from"path/to/package/deep-copy"; 或者 importdeepCopyfrom"path/to/package/deep-copy"; 3.3. 方式3:通过标签引入 您可直接从项目的发行地址中下载以.iife.js作为缀的文件,然后使用如下代码...
JS 真·深度拷贝(deepCopy) 方法: function deepCopy (data) { let dataTmp = undefined if (data === null || !(typeof data === 'object')) { dataTmp = data } else { dataTmp = data.constructor.name === 'Array' ? [] : {}...
浅拷贝ShallowCopy,是一个对象的逐位副本。创建一个新对象,该对象具有原始对象中的精确副本。如果对象的任何字段是对其他对象的引用,则只复制引用地址,即只复制内存地址,而不复制对象本身,新旧对象还是共享同一块堆内存。改变其中一个对象,另一个也会受影响。如果有修改,会失去原始数据。
As I mainly want to use deep clones in node.js using ES5 features of the V8 engine is acceptable. [Edit] Before anyone suggests let me mention there is a distinct difference between creating a copy by prototypically inheriting from the object and cloning it. The former makes a mess of ...
Add the new fields to the student1 object as in the example below.Example Code:let student1 = { name: 'kevin', age: function() { return 24; }, enrolledDate: new Date() } Next, create a deep copy of the object as above using the JSON.parse() along with the JSON.stringify() ...
A Vanilla JS Deep Copy Function If for some reason you do not want to use the JSON object or a third party library, you can also create a custom deep copy function in vanilla JavaScript. that recursively iterates through the object properties and creates a new object with the same properti...