How to change autocomplete_route_parameters value on change of select option?
I have a form element and inside autocomplete_route_parameters, I want to change $langcode value when I select any language from select list.
$form['node_items'] = array(
'#type' => 'textfield',
'#autocomplete_route_name' => 'autocomplete_node_search.autocomplete',
'#autocomplete_route_parameters' => array('skip_node_id_string' => $skip_node_id_string, 'langcode' => $langcode),
);
So if I choose language french from select list, $langcode should become = ‘fr’ via ajax.