JSFiddle - React, Tailwind, and code Playground

by craigm

HTML

<div class="banner">
    <div class="block"></div>
    <div class="triangle"></div>
</div>

<div class="bookmark">
    <div class="block"></div>
    <div class="triangle"></div>
</div>

CSS

.banner .block {
    width: 20px;
    height: 30px;
    background: red;
}

.banner .triangle {
    width: 0;
    height: 0;
    border: 10px solid transparent;
    border-top: 10px solid red;
}

.bookmark .triangle {
        width: 0;
    height: 0;
    border: 10px solid red;
    border-bottom: 10px solid transparent;
}

.bookmark .block {
    width: 20px;
    height: 20px;
    background: red;
}