<!DOCTYPE html><html lang="en"><head> ???<meta charset="UTF-8"> ???<meta name="viewport" content="width=device-width, initial-scale=1.0"> ???<meta http-equiv="X-UA-Compatible" content="ie=edge"> ???<title>Document</title></head><body> ???</body><script> ???function deepCopy(obj){ ???????//确定入参啥数组还是对象 ???????var objArray = Array.isArray(obj) ? []:{}; ???????//obj存在，且类型为对象 ???????if(obj && typeof obj === ‘object‘){ ???????????//遍历对象属性 ???????????for(key in obj){ ???????????????//判断对象属性是否属于自身 ???????????????if(obj.hasOwnProperty(key)){ ???????????????????//判断obj子属性是否为对象，如果是，递归操作，否 将对象保存 ???????????????????if(obj[key] && typeof obj[key] === ‘object‘){ ???????????????????????objArray[key] = deepCopy(obj[key]) ???????????????????}else{ ???????????????????????objArray[key] = obj[key] ???????????????????} ???????????????} ???????????} ???????} ???????return objArray; ???} ???var obj1 = { ???????nan:1, ???????bei:null, ???????dong:undefined, ???????xi:{ ???????????xinan:2, ???????????xibei:function(){ ???????????????let b = 2 ???????????} ???????}, ???????fn:function(){ ???????????let a = 1; ???????}, ???????a:[1,2] ???} ???var obj2 = deepCopy(obj1) ???console.log(obj1) ???obj2.xi.xinan = 5; ???console.log(obj2)</script></html>js对象深拷贝
原文地址：https://www.cnblogs.com/bigDipper/p/9209100.html