JSFiddle - React, Tailwind, and code Playground

HTML

<br/><br/><br/><br/><br/>
<br/><br/><br/><br/>
<span style="width: 8%; float: left" class="tooltip">
                    <span>
                        <span>Hov1</span>
                        <span class="dumClass">class classclassclass classclassclass classclassclassclassclass class class class v class v class class class class class  class class class  class class classclassclass classclassclass classclassclassclassclass class class class v class 
                        </span>
                    </span>
                </span>

<span style="width: 8%; float: left" class="tooltip">
                    <span>
                        <span>Hover2</span>
                        <span class="dumClass">class class class class v class 
                        </span>
                    </span>
                </span>

CSS

.tooltip{position:relative;}
.tooltip .dumClass {
    z-index: 10;
    display: none;
    padding: 14px 20px;
    bottom:20px;
    left:0;
    width: 240px;
    line-height: 16px;
    position: absolute;
}

.tooltip:hover .dumClass {
    display: inline;
    color: #ffffff;
    border: 1px solid #DCA;
    background: #444;
    -moz-border-radius: 11px;
    -webkit-border-radius: 11px;
    border-radius: 11px;
}

.dumClass:after {
    position: absolute;
    display: block;
    content: "";
    border-style: solid;
    border-width: 8px;
    height: 0;
    width: 0;
    border-color: #444 transparent transparent transparent;
    bottom: -16px;
    left: 14px;
}