JSFiddle - React, Tailwind, and code Playground

HTML

<div id=bellnews>
</div>

CSS

#bellnews { 
 position:absolute;
 min-width: 140px;
 min-height:100px;
 background: #fff; 
 color: #000;
 border:1px solid #000;
}


#bellnews:before {
    content: "";
    vertical-align: middle;
    margin-left: 65px;
    position: absolute;
    left: 0;
    top: -5px;
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-bottom: 5px solid black;
}