Emulating private properties using ES6 proxies

private_properties.js

var myObject = {    
    __meta__: {
        public: ['publicMethod']
    },
    privateMethod: function() { return 'private'},
    publicMethod: function() {return 'public' }
};

var myProxyObject = new Proxy(myObject, {
    get: function(target, name) {
        if(target.__meta__.public.indexOf(name) === -1) throw new Error('THIS IS PRIVAAAAAAAATE');
        
        return target[name];
    }
});

myProxyObject.publicMethod(); // "public"
myProxyObject.privateMethod(); // Error: THIS IS PRIVAAAAAAAATE