ClipboardJS with Tooltip

<h2>Code 2</h2>
<pre><code>&lt;style type="text/css"&gt;
div#related-posts:before,.author-wrap:before{
     content: "";
     display: block;
     height: 3px;
     width: 100%;
     background: #f0f0f0;
     position: absolute;
     top: 28px;
     z-index: 1;
     border-radius: 5px;
}
&lt;/style&gt;
</code></pre>
<style>
#clpmsg,
#clpmsg::before,
.clpbrd {
    position: absolute
}

pre {
    position: relative;
    border-color: #f5f5f5;
    border-style: solid;
    border-width: 1px 1px 1px 0;
    padding: 10px;
    border-left: solid 5px #4CAF50;
    font-size: 15px;
    max-height: 500px;
    overflow-y: scroll;
    white-space: pre-wrap
}

.clpbrd {
    background: #fff;
    border: 1px solid #d5d5d5;
    padding: 2px;
    border-radius: 3px;
    width: 25px;
    height: 25px;
    cursor: pointer;
    top: 3px;
    right: 3px;
    -webkit-transition: opacity .3s ease-in-out;
    -o-transition: opacity .3s ease-in-out;
    transition: opacity .3s ease-in-out;
    opacity: 0
}

pre .clpbrd:hover #clpmsg,
pre:hover .clpbrd {
    opacity: 1
}

pre .clpbrd:active,
pre .clpbrd:hover {
    background-color: #ddd;
    background-image: none;
    border-color: #b5b5b5;
    transition: .3s;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, .15)
}

pre .clpbrd:focus {
    text-decoration: none;
    border-color: #51a7e8;
    outline: 0;
    box-shadow: 0 0 5px rgba(81, 167, 232, .5)
}

#clpmsg {
    background-color: #000;
    color: #fff;
    padding: 3px 5px;
    border-radius: 3px;
    word-break: initial;
    height: 17px;
    top: -1px;
    right: 31px;
    opacity: 0;
    -webkit-transition: opacity 1s ease-in-out;
    -o-transition: opacity 1s ease-in-out;
    transition: opacity 1s ease-in-out
}

#clpmsg::before {
    content: "";
    border: 10px solid;
    top: 2px;
    border-color: transparent transparent transparent #000;
    right: 0;
    margin-right: -15px;
    width: 0;
    height: 0
}</style>
<script>function showTooltip(elem){$("<span id='clpmsg'>Copied</span>").prependTo(elem),$(elem).children().first().delay(1e3).fadeOut(1e3,function(){$(this).remove()})}$("<button class='clpbrd' data-clipboard-action='copy' data-clipboard-target='pre code'><i class='far fa-clone'></i></button>").insertBefore("pre code");var clipboard=new ClipboardJS(".clpbrd",{target:function(trigger){return trigger.nextElementSibling}});clipboard.on("success",function(e){e.clearSelection(),showTooltip(e.trigger)});var TopOffset=parseInt($(".clpbrd").css("top"));$("pre").scroll(function(){$(".clpbrd").css({top:$(this).scrollTop()+TopOffset})});</script>

​x
 
<link href='https://use.fontawesome.com/releases/v5.0.13/css/all.css' rel='stylesheet' type='text/css'/>
<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.1/clipboard.min.js'></script>
<center><h1>Hover and click copy</h1></center>
<h2>Code 1</h2>
<pre><code>&lt;style type="text/css"&gt;
div#comments:before{
     content: "";
     display: block;
     height: 3px;
     width: 100%;
     background: #f0f0f0;
     position: absolute;
     top: 14px;
     z-index: 1;
     border-radius: 5px;
}
&lt;/style&gt;
</code></pre>
​
<h2>Code 2</h2>
<pre><code>&lt;style type="text/css"&gt;
div#related-posts:before,.author-wrap:before{
     content: "";
     display: block;
     height: 3px;
     width: 100%;
     background: #f0f0f0;
     position: absolute;
     top: 28px;
     z-index: 1;
     border-radius: 5px;
}
&lt;/style&gt;
</code></pre>
<style>
#clpmsg,
#clpmsg::before,
.clpbrd {
    position: absolute
}
​
pre {
    position: relative;