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so did you know in javascript theres this cool class called the proxy class which you can use to wrap other objects in javascript to know when people are trying to read or write from the properties sounds kind of confusing so lets go ahead and look at example so lets say we have a person object that has a name and age and we wanted to add some type of automatic validation to never allow age to become a negative number right so we can use the proxy class to instantiate a new proxy so ill say consp is equal to new proxy im going to pass it the original person object and then inside the second argument im going to pass a handler that has a set method and this set method is going to take in a target a key and a value and so what we can do is we can say if the key that the person is trying to modify happens to be age and the value that they pass in is actually less than zero i can just go ahead and throw an error like throw new error age must be positive and then otherwise we can just