Function formatter

packages/datetime-picker/demo/index.ts:15–23

(type, value)

    currentDate4: '12:00',
    loading: false,
    formatter(type, value) {
      if (type === 'year') {
        return `${value}年`;
      }
      if (type === 'month') {
        return `${value}月`;
      }
      return value;
    },
    filter(type, options) {
      if (type === 'minute') {
        return options.filter((option) => option % 5 === 0);