JSFiddle - React, Tailwind, and code Playground

HTML

Everything OK now</br>
<select name="event[maschine_id]">
<option value="1">1_Loader</option>
<option value="2">2_Loader_QCV</option>
</select>

JavaScript

$(function(){
$('select').css({border: '5px solid red'});    
$('select[name="event[maschine_id]"]').css({border: '5px solid green'});
});