JSFiddle - React, Tailwind, and code Playground

HTML

<button>A</button>
  <button>B</button>
  <button>C</button>
  <p id="msg"></p>

JavaScript

document.getElementsByTagName("body")[0]
  .addEventListener("click", function(evt) {
    var msg = document.getElementById("msg");
    if (evt.target.tagName === "BUTTON") {
        msg.textContent = "Vous avez cliqué sur " +
           evt.target.textContent;
    } else {
        console.log(evt.target);
        msg.textContent = "Vous avez raté les boutons...";
    }
});