JSFiddle - React, Tailwind, and code Playground

by Thiago Diniz

HTML

<div class="whatsapp">
    <i>I</i>
    <span>(41) 9233 - 4560</span>    
</div>

CSS

*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:sans-serif;
    transition:all .2s linear
}

.whatsapp{
    top:100px;
    right:-150px;
    padding:8px;
    color:#FFF;
    text-align:right;
    background-color:#21BA45;
    width:200px;
    position:fixed;
}

.whatsapp i{
    float:left
}

.whatsapp:hover{
    right:0
}