CODE EXAMPLE FOR JAVASCRIPT

create dropdown in flutter

DropdownButton(
  value: currentItem,
  items: items
      .map<DropdownMenuItem<String>>(
        (e) => DropdownMenuItem(
          value: e,
          child: Text(e),
        ),
      )
      .toList(),
  onChanged: (String? value) => setState(
    () {
      if (value != null) currentItem = value;
    },
  ),
),