Popups

<div class="popup" onclick="myFunction()">Fai click per vedere il popup!
 <span class="popuptext" id="myPopup">Questo è il testo del Popup</span>
</div>

/* Popup container */
.popup {
 position: relative;
 display: inline-block;
 cursor: pointer;
}


/* The actual popup (appears on top) */
.popup .popuptext {
 visibility: hidden;
 width: 160px;
 background-color: #555;
 color: #fff;
 text-align: center;
 border-radius: 6px;
 padding: 8px 0;
 position: absolute;
 z-index: 1;
 bottom: 125%;
 left: 50%;
 margin-left: -80px;
}

/* Popup arrow */
.popup .popuptext::after {
 content: "";
 position: absolute;
 top: 100%;
 left: 50%;
 margin-left: -5px;
 border-width: 5px;
 border-style: solid;
 border-color: #555 transparent transparent transparent;
}

/* Toggle this class when clicking on the popup container (hide and show the popup) */
.popup .show {
 visibility: visible;
 -webkit-animation: fadeIn 1s;
 animation: fadeIn 1s
}

/* Add animation (fade in the popup) */
@-webkit-keyframes fadeIn {
 from {opacity: 0;}
 to {opacity: 1;}
}

@keyframes fadeIn {
 from {opacity: 0;}
 to {opacity:1 ;}
}

<script>
// When the user clicks on <div>, open the popup
function myFunction() {
 var popup = document.getElementById("myPopup");
 popup.classList.toggle("show");
}
</script>