JSFiddle - React, Tailwind, and code Playground
HTML
<select id="bewerbungID">
<option value="1" name="selectName">test1</option>
<option value="2" name="selectName">test2</option>
<option value="3" name="selectName">test3</option>
</select>JavaScript
$('#bewerbungID select').on('change', function() {
alert($('option[name=selectName]:checked', '#bewerbsungID').val());
});