JS - Outputting condition with prompt

Question

//Condition with prompt question
  let year = prompt('In which year was ECMAScript-2015 specification published?', '');
  if (year == 2015) {
    alert( 'You are right!' );
  } else if (year < 2015) {
    alert('hey, do you think ECMAScript is so outdated?')
  }
  else {
    alert('Wrong, wrong, wrong')
  }