Tryit Editor v2.9

Edit This Code:

<!DOCTYPE html>
<html>
<style>
.tooltip {
   position: relative;
   display: inline-block;
   border-bottom: 1px dotted black;
}

.tooltip .tooltiptext {
   visibility: hidden;
   width: 120px;
   background-color: black;
   color: #fff;
   text-align: center;
   border-radius: 6px;
   padding: 5px 0;
   position: absolute;
   z-index: 1;
   bottom: 100%;
   left: 50%;
   margin-left: -60px;

   /* Fade in tooltip - takes 1 second to go from 0% to 100% opac: */
   opacity: 0;
   transition: opacity 1s;
}

.tooltip:hover .tooltiptext {
   visibility: visible;
   opacity: 1;
}
</style>
<body style="text-align:center;">

<h2>Fade In Tooltip on Hover</h2>
<p>When you move the mouse over the text below, the tooltip text will fade in and take 1 second to go from completely invisible to visible.</p>

<div class="tooltip">Hover over me
  <span class="tooltiptext">Tooltip text</span>
</div>

</body>
</html>

<!DOCTYPE html>
<html>
<style>
.tooltip {
    position: relative;
    display: inline-block;
    border-bottom: 1px dotted black;
}

.tooltip .tooltiptext {
    visibility: hidden;
    width: 120px;
    background-color: black;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 5px 0;
    position: absolute;
    z-index: 1;
    bottom: 100%;
    left: 50%;
    margin-left: -60px;
    
    /* Fade in tooltip - takes 1 second to go from 0% to 100% opac: */
    opacity: 0;
    transition: opacity 1s;
}

.tooltip:hover .tooltiptext {
    visibility: visible;
    opacity: 1;
}
</style>
<body style="text-align:center;">

<h2>Fade In Tooltip on Hover</h2>
<p>When you move the mouse over the text below, the tooltip text will fade in and take 1 second to go from completely invisible to visible.</p>

<div class="tooltip">Hover over me
  <span class="tooltiptext">Tooltip text</span>
</div>

</body>
</html>