JSFiddle - React, Tailwind, and code Playground

by HemalathaThanigaivel

HTML

<table border="1">
    <tr>
        <td class="note">Triangle!</td>
        <td>No Triangle!</td>
    </tr>
</table>

CSS

td {
    padding: 20px;
}
.note {
    position: relative;
}
.note:after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
	width: 0; 
	height: 0; 
    display: block;
	border-right: 20px solid transparent;
	border-bottom: 20px solid transparent;
	
	border-top: 20px solid #f00;
}