how to insert data into select2 search input after scan using qrcode

javascript php codeigniter jquery-select2

PHP Snippet 1:

$('#add_order').select2();

PHP Snippet 2:

$(function(){
  //Your script
  console.log($('#add_order').lenght);//should display 1!
  $('#add_order').select2();
   :
   :
});

PHP Snippet 3:

$('#add_order').val("yourvalue").trigger("change");