1、万能的for循环实现对象的拷贝
var obj = {
name: 'FungLeo',
sex: 'man',
old: '18'
}
var obj2 = copyObj(obj)
function copyObj(obj) {
let res = {}
for (var key in obj) {
res[key] = obj[key]
}
return res
}2、转换成json再转换成对象实现对象的深拷贝
var obj = {
name: 'FungLeo',
sex: 'man',
old: '18'
}
var obj2 = JSON.parse(JSON.stringify(obj))3、扩展运算符实现对象的深拷贝
var obj = {
name: 'FungLeo',
sex: 'man',
old: '18'
}
var { ...obj2
} = obj
obj.old = '22'
console.log(obj)
console.log(obj2)