JSFiddle - React, Tailwind, and code Playground

HTML

<select class="listseq2" id="idfiliere">
    <option disabled selected></option>
    <option value="Option 1">Option 1</option>
</select>

JavaScript

$('.listseq2').on('change',function(){
     var choix = $('#idfiliere option:selected').val();
     alert(choix);
});