从给定的日期范围中获取周的日期范围

startDate = new Date(startDate);
startDate.setDate(startDate.getDate() + (1 - startDate.getDay() + 7) % 7);

endDate = new Date(endDate);
endDate.setDate(endDate.getDate() + (7 - endDate.getDay()) % 7);

var weeks = Math.floor((endDate - startDate) / (7 * 24 * 60 * 60 * 1000)) + 1;

var weekRanges = [];
for (var i = 0; i < weeks; i++) {
  var startOfWeek = new Date(startDate.getTime() + (i * 7 * 24 * 60 * 60 * 1000));
  var endOfWeek = new Date(startOfWeek.getTime() + (6 * 24 * 60 * 60 * 1000));
  weekRanges.push({
    start: startOfWeek,
    end: endOfWeek
  });
}