JSFiddle - React, Tailwind, and code Playground

HTML

<p>p</p>
<p>p</p>
<p>p</p>

<button>Go</button>

<select name="sometext">
  <option>text1</option>
  <option>text2</option>
  <option>text3</option>
  <option>text4</option>
  <option>text5</option>
</select>

JavaScript

$(function () {
    $('button').on('click', function () {
        $('select').attr('size', 5);
        $('select').focus();
    });
    
    $('select').on('blur', function () {
        $('select').removeAttr('size', 5);
    });
});