JavaScript: implementare un menu push

Con JavaScript e CSS possiamo implementare un menu di tipo push.

Usiamo questi stili CSS:

html, body {
    overflow-x: hidden;
}
#menu {
    position: fixed;
    top: 0;
    left: 0;
    transform: translateX(-300px);
    width: 300px;
    height: 100vh;
    transition: all .3s ease-in;
    background-color: #fff;
}

#menu.open {
    transform: translateX(0);
}

Quindi con JavaScript avremo:

const toggle = document.querySelector('#toggle-menu');
const menu = document.querySelector('#menu');

toggle.addEventListener('click', e => {
    e.preventDefault();
    menu.classList.toggle('open');
}, false);