BRE03

document.addEventListener('DOMContentLoaded', function() {
    let button = document.getElementById("ex4Btn");

    button.addEventListener("click", function () {
        let ul = document.getElementById("crepe");

        let li = document.createElement("li");
        let beurre = document.createTextNode("Beurre");

        li.appendChild(beurre);
        ul.appendChild(li);
    })
})