JSFiddle - React, Tailwind, and code Playground

by tabalinas

HTML

<div id=corner></div>

CSS

#corner{
    border-top: 4px solid #007aff;
    border-left: 4px solid #007aff;
    width: 13px;
    height: 13px;
    transform:rotate(-45deg);
    -ms-transform:rotate(-45deg); /* IE 9 */
    -webkit-transform:rotate(-45deg); /* Safari and Chrome */
}