园龄：3年2个月粉丝：7 关注：4

面试-深拷贝

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
     
</body>
<script>
    window.onload=function(){
        getData()
    }
    const data={
        age:'18',
        name:'lisi',
        sex:'男',
    }
    function deepClone1(data){
             return(JSON.parse(JSON.stringify(data)))
    }
    function deepClone2(data){
             return({...data})
    }
    function deepClone3(data){
        let o ={ }//重新开辟堆内存(栈内存空间较小，存放的都是简单数据类型或者指针，自动回收自动开辟，复杂类型数据一般存放与堆内存)
        for(let key in data){
            o[key] = data[key]
        }
        return(o)
    }
   
    function getData(){
       const copydata = deepClone3(data)
       copydata.age = '22'
       console.log('data',data)
       console.log('copydata',copydata)
 
    }
</script>
</html>