EnhancedObjectProperties.js

//ES5
var indexFn = function () {
  return 1;
};
var objES5 = {
  name: 'Can',
};
objES5['Columnn' + indexFn()] = 42;
console.log(objES5);
//output
// { name: 'Can', Columnn1: 42 }

//ES6
let objES6 = {
  name: 'Can',
  ['Columnn' + indexFn()]: 42,
};
console.log(objES6);
//output
// { name: 'Can', Columnn1: 42 }