date-fns/esm/_lib/isSameUTCWeek/index.js

Modern JavaScript date utility library

import startOfUTCWeek from '../startOfUTCWeek/index.js'; // This function will be a part of public API when UTC function will be implemented.
// See issue: https://github.com/date-fns/date-fns/issues/376

export default function isSameUTCWeek(dirtyDateLeft, dirtyDateRight, options) {
  if (arguments.length < 2) {
    throw new TypeError('2 argument required, but only ' + arguments.length + ' present');
  }

  var dateLeftStartOfWeek = startOfUTCWeek(dirtyDateLeft, options);
  var dateRightStartOfWeek = startOfUTCWeek(dirtyDateRight, options);
  return dateLeftStartOfWeek.getTime() === dateRightStartOfWeek.getTime();
}