JSFiddle - React, Tailwind, and code Playground

HTML

<div class="parent">
Hi, this is test
    <div class="one">Hi, I am old</div>
    <br>
</div>
<br>
<button class="add">Add</button>

CSS

.one{
    color: red;
    background-color: grey;
}

JavaScript

$(".add").click(function(){
    $(".parent").append("<div class='one'> I am new </div>");
	alert("your content is added");
});
$('.one').trigger('click');
$('body').delegate(".one", "click", function(e){
   // do you other works here
    alert("hi, I can here you: "+$(this).text());
});