JSFiddle - React, Tailwind, and code Playground

HTML

<select id="SOME_NAME" name="jerseys" class="mobile">
        <option value="1">1</option>
        <option value="2">2</option>
        <option value="3">3</option>
        <option value="4">4</option>
        <option value="5">5</option>
    </select>


<div class="block" id="SOME_DIV_NAME">
       <span></span> 
       <select name="jersey_two_size">
          <option>S</option>
          <option>M</option>
          <option>Large</option>
       </select>
    </div>

JavaScript

$('#SOME_DIV_NAME').hide();
$('#SOME_NAME').change(function() {
      $( "#SOME_DIV_NAME" ).show();
      $("#SOME_DIV_NAME span").text("Jersey #"+ $( "#SOME_NAME option:selected" ).text() + " Info:");
    });