Lists all months names in the en-US locale in pure JavaScript (ES6)

list.all.months.js

function listMonths() {
  var currentDate = new Date();
  return Array.from(new Array(12), (_, monthIdx) => {
    currentDate.setMonth(monthIdx);
    return currentDate.toLocaleString("en-US", {month: "long"})
  });
}

console.log(listMonths());