JAVASCRIPT

moment get week

const currentWeekNumber = moment().week()

const weekNumberFromDay = moment('yyyy-mm-dd').week()

moment get start of week in datetime

const today = moment();
const from_date = today.startOf('week');
const to_date = today.endOf('week');
console.log({
  from_date: from_date.toString(),
  today: moment().toString(),
  to_date: to_date.toString(),
});

// {
//   from_date: "Sun Apr 22 2018 00:00:00 GMT-0500",
//   today: "Thu Apr 26 2018 15:18:43 GMT-0500",
//   to_date: "Sat Apr 28 2018 23:59:59 GMT-0500"
// }

moment js get last week start and end date

console.log(moment().subtract(1, 'weeks').startOf('isoWeek').format('dddd'));
console.log(moment().subtract(1, 'weeks').endOf('isoWeek').format('dddd'));

console.log(moment().subtract(1, 'weeks').startOf('week').format('dddd'));
console.log(moment().subtract(1, 'weeks').endOf('week').format('dddd'));

console.log(moment().subtract(1, 'weeks').startOf('week').format('YYYY-MM-DD'));
console.log(moment().subtract(1, 'weeks').endOf('week').format('YYYY-MM-DD'));