JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
  <li>0</li>
  <li class="always_fixed">Im always firs mothefucker!!</li>
  <li>2</li>
  <li>3</li>
  <li>4</li>
  <li>5</li>
</ul>

JavaScript

var parent = $('ul')
var children = [].slice.call(document.querySelectorAll('ul li'))
var fixed = $('.always_fixed');

while (children.length) {
  parent.append(children.splice(Math.floor(Math.random() * children.length), 1)[0]);
}

var second = $('ul li:eq(1)')
second.html(fixed);