JSFiddle - React, Tailwind, and code Playground

HTML

<span id="st">Something</span>

CSS

/* triangle after */
#st:after {
    position: relative;
    margin-left: 10px;
    content:"";
    width:0;
    height: 0;
    border-top:4px solid transparent;
    border-bottom:4px solid transparent;
    border-left:4px solid black;
    display: inline-block;
}
#st {
    line-height: 20px;
}