如何从MM-YY转换为MM/DD/YYYY

function convertDateFormat(dateString) {
  var parts = dateString.split("-");
  var month = parts[0];
  var year = parts[1];

  if (month.length === 1) {
    month = "0" + month;
  }

  if (year.length === 2) {
    var currentYear = new Date().getFullYear().toString().substr(-2);
    year = parseInt(year);
    year = (year < 50) ? "20" + year : "19" + year;
  }

  var convertedDate = month + "/01/" + year;
  return convertedDate;
}

var inputDate = "01-22";
var convertedDate = convertDateFormat(inputDate);
console.log(convertedDate);  // 输出：01/01/2022