name: DatePicker
purpose: Native date input. In AutoForm, rangeEnd edits a second field as one date range.

attributes:
  range: boolean; show a standalone end-date input
  rangeend: string; second AutoForm data field; schema setting.rangeEnd takes precedence

properties:
  value: string; start date, YYYY-MM-DD

state:
  start: string; start date, YYYY-MM-DD
  end: string; end date, YYYY-MM-DD when range is enabled

events:
  change: detail is the changed date string

examples:
  single_and_range: |
    <script>
      const booking = { birthday: '1990-01-01', from: '2026-01-01', to: '2026-01-31' }
      const bookingSchema = [
        { name: 'birthday', label: 'Birthday', type: 'DatePicker' },
        { name: 'from', label: 'Period', type: 'DatePicker', setting: { rangeEnd: 'to' } }
      ]
    </script>

    <DatePicker $bind="booking.birthday"></DatePicker>
    <DatePicker range></DatePicker>
    <AutoForm $.state.data="booking" $.state.schema="bookingSchema"></AutoForm>

rules:
  - Define page data before DatePicker is parsed.
  - Use range for a standalone visual range; read its state.start and state.end.
  - In AutoForm, declare setting.rangeEnd on the start field; the end field does not need its own schema item.

related:
  - ../base/AutoForm.yaml

tests:
  - DatePicker.test.html