JSFiddle - React, Tailwind, and code Playground

JavaScript

$('document').ready(function(){
                    $('select.region').change(function(){
                        var id = $(this).attr('value');
                        localStorage.setItem("region", selected.val());
                       $(this).find('option:selected').attr('selected', true);
                        console.log(id);
                        $.ajax({
                            cache: false,
                            type : "GET",
                            url : "<?=Yii::app()->createUrl("tools/microRegions")?>",
                            data : {id:id},
                            success:function(data){
                                $('select.rayon').append(data).change(function(){
                                    $('button.btn-right-minlabour').removeAttr('disabled');
                                })
                            }
                        });
                    });
                    $("select.region").val(localStorage["region"]);
                });