javascript dynamically generate private variable accessor_javascript skills

Copy code The code is as follows:

//Create a new user object and accept a Objects with many properties as parameters
function User(properties)
{
//Traverse all properties of the object and ensure that their scope is correct
for(var i in properties){
(function(which){
var p=i;
//Create a new reader (getter) for this property
which["get" p]=function(){
return properties[p];
};

//Create a new setter (setter) for this property
which["set" p]=function(val)
{
properties[p]=val;
};
})(this);
}
}
//Create a new user object instance and add two An object of the attribute is passed in as a parameter
var user=new User({name:"Bob",age:44});
//Read the attribute value
alert(user.getname()) ;
//Set attribute value
user.setage(23);