Tryit Editor v2.9

Edit This Code:
<!DOCTYPE html>
<html>
<head>
<style> 
div.test {
    white-space: nowrap; 
    width: 12em; 
    overflow: hidden; 
    border: 1px solid #000000;
}

div.test:hover {
    text-overflow: inherit;
    overflow: visible;
}
</style>
</head>
<body>

<p>Hover over the two divs below, to see the entire text.</p>

<div class="test" style="text-overflow:ellipsis;">This is some long text that will not fit in the box</div>
<br>
<div class="test" style="text-overflow:clip;">This is some long text that will not fit in the box</div>

</body>
</html>