JSFiddle - React, Tailwind, and code Playground

by Valentin Delbeke

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.2/jquery.min.js"></script>
<ul class="list">
    <li class="item_20">A</li>
    <li class="item_20">B</li>
    <li class="item_20">C</li>
    <li class="item_21">D</li>
    <li class="item_21">E</li>
    <li class="item_22">F</li>
    <li class="item_22">G</li>
</ul>

JavaScript

var elem = {};
$('ul.list li').each(function() {
   var txt = $(this).attr('class');
   if (elem[txt])
       $(this).remove();
   else
       elem[txt] = true;
});