Create a closure

// Create a closure

var SecretStore = (function() {

var data, secret, newSecret;

// Emulation of a private variables and functions

data = 'secret';

secret = function() {

return data;

}

gewSecret = function(newValue) {

data = newValue;

return secret();

}

// Return an object literal which is the only way

return {

getSecret: secret,

setSecret: newSecret,

};

})();

var secret = SecretStore;

// => "secret"

console.log(secret.getSecret());

// => "foo"

console.log(secret.setSecret("foo”));

I => "foo"

console.log(secret.getSecret());

var secretz = SecretStore;

// => "foo"

console. log(secret2.getSecret( ) )