drinks-manager/app/static/js/main.js

document.addEventListener("DOMContentLoaded", () => {
    let dropdownmenuElement = document.getElementById("dropdownmenu");
    let dropdownmenuButtonElement = document.getElementById("dropdownmenu-button");
    if (dropdownmenuButtonElement != null) {
        dropdownmenuButtonElement.addEventListener("click", () => {
            if (dropdownmenuElement.classList.contains("dropdownvisible")) {
                dropdownmenuElement.classList.remove("dropdownvisible");
            }
            else {
                dropdownmenuElement.classList.add("dropdownvisible");
            }
        })
    }
});