<!DOCTYPE html>
<html lang="zh-CN">
<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>深拷贝</title>
</head>
<body>
<script type="text/javascript">
function deepClone(obj = {}) {
// obj 是 null ，或者不是 object ，直接返回
if (typeof obj !== 'object' || obj == null) {
return obj
}
let result
if (obj instanceof Array) {
result = []
} else {
result = {}
}
for (let key in obj) {
// 保证 key 不是原型的属性
if (obj.hasOwnProperty(key)) {
// 递归调用！！！
result[key] = deepClone(obj[key])
}
}
return result
}
const obj1 = {
name: '姓名1',
age: 36,
address: {
city: 'beijing'
},
arr: [1, 2, 3]
}
const obj2 = deepClone(obj1)
obj2.name = '姓名2'
obj2.age = 40
obj2.address.city = '广州'
obj2.arr = [3, 4, 5]
console.log(obj1)
console.log(obj2)
</script>
</body>
</html>
