So to get back to the initial question, can you get a deep copy of the initial Object by changing nothing in the draft. No you cannot, and even if you did (by changing a property created just to fool immer perhaps), the resultant cloned object will be immutable and not really helpful...
I have a JavaScript object in a Vue instance that is being deep copied into another JavaScript object via a computed property. However for some reason it shallow copies the object in question instead of a deep copy, even thoughJSON.parse(JSON.stringify())is being used:...
One of the ways of creating a deep copy of an object in JavaScript is using the structuredClone() method. The method uses a structured clone algorithm that deep clones an object.The method takes the object which is to be cloned as the parameter. Let’s perform the cloning....
1.下面的方法,是给Object的原型(prototype)添加深度复制方法(deep clone)。 1Object.prototype.clone =function() {2//Handle null or undefined or function3if(null==this|| "object" !=typeofthis)4returnthis;5//Handle the 3 simple types, Number and String and Boolean6if(thisinstanceofNumber ||th...
递归: 没问题 function deepClone(obj) { var target = {}; for(var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { // 如果obj有key这个属性的话 if (
首先我们要实现一个getType函数对元素进行类型判断,直接调用Object.prototype.toString 方法。 functiongetType(obj){letmap={"[object Boolean]":"boolean","[object Number]":"number","[object String]":"string","[object Function]":"function","[object Array]":"array","[object Date]":"date","[obje...
This creates the need for a method to deep clone the object. This tutorial teaches how to deep clone an object in JavaScript. Shallow Copy vs Deep Copy A shallow copy is a bitwise copy of the object. The new object created successfully copies the primitives like numbers, boolean, and ...
}returncopy; } 解决循环引用 letobj = {val:2}; obj.target= obj;deepClone(obj);// 报错: RangeError: Maximum call stack size exceeded 思路:创建一个 Map ,记录已经被拷贝的对象,遇到已经拷贝的对象,直接返回。 constisObject= (target) => {return(typeoftarget ==='object'||typeoftarget ==='...
jQuery.extend( [deep ], target, object1 [, objectN ] ),其中deep为Boolean类型,如果是true,则进行深拷贝。 // jQuery.extend()源码jQuery.extend = jQuery.fn.extend = function() { var options, name, src, copy, copyIsArray, clone,
copy = Object.create(Object.getPrototypeOf(obj));hash.set(obj, copy);for (let key in obj) {...