var sayNode = function() {
    console.log('Node');
};
var es = 'ES';
var oldObject = {
    sayJS: function() {
        console.log('JS');
    },
    sayNode: sayNode,
};
oldObject[es + 6] = 'Fantastic';

oldObject.sayNode(); // Node
oldObject.sayJS(); // JS
console.log(oldObject.ES6); // Fantastic

const sayNode = function() {
    console.log('Node');
};
const es = 'ES';
const newObject = {
    sayJS() {
        console.log('JS');
    },
    sayNode,
    [es + 6]: 'Fantastic',
}

newObject.sayNode(); // Node
newObject.sayJS(); // JS
console.log(newObject.ES6); // Fantastic

{ name: name, age: age } // ES5
{ name, age } // ES2015