[html]
<div class="popup" onclick="myFunction()">Нажми меня!
  <span class="popuptext" id="myPopup">текст😃всплывающий...</span>
</div>
<style>
/* 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 ;}
}
</style>

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

Создание всплывающих окон
Шаг 1) добавить HTML:

<div class="popup" onclick="myFunction()">Click me!
  <span class="popuptext" id="myPopup">Popup text...</span>
</div>

Шаг 2) добавить CSS:

/* 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 ;}
}

Шаг 3) добавить JavaScript:

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

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