JSFiddle - React, Tailwind, and code Playground

HTML

<input type="test" id="textUl" />
<button id="appendButton">Incrementar</button>
<ul class="listLi" id="lista"><span id="numero_elementos"></span></ul>

JavaScript

$('#appendButton').click(function(){
    var text = $('#textUl').val();
    if(text.length){
        $('<li />', {html: text, href: text}).appendTo('ul.listLi')
         $("#numero_elementos").html($("#lista li").size());
    }
});