class X {
@deco #x
}PrivateName
WeakMap + Brand checking
get(instance)
set(instance, value)Can be proxied!
You can trap all private states of all instances
Symbol
You can only get the private state when you have the instance
Too powerful!
Security issue
Vue, MobX
- Need to decorate all responsive properties
- Need to filter all properties of all instances
Performance?