use static method
void
use()
Register to use Dropdown component.
Implementation
static void use() {
if (_registered) return;
_registered = true;
$document()
..on('click.bs.dropdown.data-api', (QueryEvent e) => _clearMenus())
..on('click.bs.dropdown.data-api', (QueryEvent e) => e.stopPropagation(), selector: '.dropdown form')
..on('click.bs.dropdown.data-api', _toggleEvent, selector: _toggleSelector)
..on('keydown.bs.dropdown.data-api', _keydown, selector: "${_toggleSelector}, [role=menu]");
}