JSFiddle - React, Tailwind, and code Playground

HTML

<input type="button" id="bar" value="ajout" />
<div id="res"></div>

JavaScript

$('#bar').click(function(){
    $('#res').append( $('<input/>').attr({"type":"button","value":"nouveau","class":"foo"}) )
                     })

$('#res').on('click','.foo', function(){ alert('hello')})