JSFiddle - React, Tailwind, and code Playground

HTML

<button>YES!</button>
    <button>NO!</button>
    <button>WE CAN!</button>
    <hr />
    <p id="p1">First line of paragraph.</p>

JavaScript

function addTextNode() {
        var newtext = document.createTextNode(this.innerHTML),
            p1 = document.getElementById("p1");

        p1.appendChild(newtext);
    }

    var btns = document.getElementsByTagName("button");

    for(i = 0; i < btns.length; i++){
        var button = btns[i]; 
        button.addEventListener("click", addTextNode);
    }