JSFiddle - React, Tailwind, and code Playground

by zhukovroman

HTML

<select name="блок" size="1" class="select2">
  <option value="безпружинный">Безпружинный</option>
  <option value="zinger">Zinger</option>
  <option value="256">256</option>
  <option value="625">625</option>
  <option value="1100">1100</option>
</select>

<div id="cns_1">CNS1 DIV</div>

CSS

#cns_1 {margin-top: 100px;}

JavaScript

var cns_1 = $('#cns_1');
cns_1.hide();

$('.select2').change(function(){
    var selected = $("select option:selected").val();
    if (selected=='zinger') cns_1.hide();
    if (selected=='безпружинный') cns_1.show();
});