JSFiddle - React, Tailwind, and code Playground
HTML
<div><button class="plus">test</button></div>
<button id="addB">add new button</button>
<hr/>JavaScript
$(document).on("click", "button.plus", function(){
alert("button pressed");
});
document.getElementById("addB").addEventListener("click", function(){
var btn=document.createElement("button");
var txt=document.createTextNode("new biutton");
btn.setAttribute("class", "plus");
btn.appendChild(txt);
document.body.appendChild(btn);
});