JSFiddle - React, Tailwind, and code Playground

by lukas_li

HTML

<div>abcdef</div>

CSS

div:before {
    
    /* border-bottom: 10px solid #fc0; */
    content: "";
    display: block;
    border: 20px solid transparent;
    border-bottom: 20px solid #ccc;
    border-top: 0;
    position:absolute;
    top:10px;
}