将两个日期之间的日期传递回formatday方法

function formatday(date) {
  // 格式化日期的方法
  // ...
}

function getDatesBetween(startDate, endDate) {
  var dates = [];
  var currentDate = new Date(startDate);

  while (currentDate <= endDate) {
    dates.push(new Date(currentDate));
    currentDate.setDate(currentDate.getDate() + 1);
  }

  return dates;
}

var startDate = new Date("2022-01-01");
var endDate = new Date("2022-01-10");

var datesBetween = getDatesBetween(startDate, endDate);

datesBetween.forEach(function(date) {
  formatday(date);
});