使用reduce to group date生成date_from和date_to

const dates = [
  { date: '2022-01-01' },
  { date: '2022-01-02' },
  { date: '2022-01-03' },
  { date: '2022-01-04' },
  { date: '2022-01-05' },
  { date: '2022-01-06' },
  { date: '2022-01-07' },
  { date: '2022-01-08' },
  { date: '2022-01-09' },
  { date: '2022-01-10' }
];

const result = dates.reduce((acc, curr) => {
  const date = new Date(curr.date);
  const dateString = date.toDateString();
  
  if (!acc[dateString]) {
    acc[dateString] = {
      date_from: curr.date,
      date_to: curr.date
    };
  } else {
    acc[dateString].date_to = curr.date;
  }
  
  return acc;
}, {});

console.log(result);

{
  'Sat Jan 01 2022': { date_from: '2022-01-01', date_to: '2022-01-01' },
  'Sun Jan 02 2022': { date_from: '2022-01-02', date_to: '2022-01-02' },
  'Mon Jan 03 2022': { date_from: '2022-01-03', date_to: '2022-01-03' },
  'Tue Jan 04 2022': { date_from: '2022-01-04', date_to: '2022-01-04' },
  'Wed Jan 05 2022': { date_from: '2022-01-05', date_to: '2022-01-05' },
  'Thu Jan 06 2022': { date_from: '2022-01-06', date_to: '2022-01-06' },
  'Fri Jan 07 2022': { date_from: '2022-01-07', date_to: '2022-01-07' },
  'Sat Jan 08 2022': { date_from: '2022-01-08', date_to: '2022-01-08' },
  'Sun Jan 09 2022': { date_from: '2022-01-09', date_to: '2022-01-09' },
  'Mon Jan 10 2022': { date_from: '2022-01-10', date_to: '2022-01-10' }
}