Javascript deep copy function _ javascript skills

The assignment of objects in Javascript is the same as that in Java. that is to say, when an object is assigned to a variable, the variable still points to the original object address. the answer is clone. function objectClone (obj, preventName ){
If (typeof obj) = 'object '){
Var res = (! Obj. sort )? {}: [];
For (var I in obj ){
If (I! = PreventName)
Res [I] = objectClone (obj [I], preventName );
}
Return res;
} Else if (typeof obj) = 'function '){
Return (new obj (). constructor;
}
Return obj;
}