JSFiddle - React, Tailwind, and code Playground

HTML

<div></div>
<div></div>

CSS

div {
    width: 100px;
    height: 30px;
    background: #369;
    margin: 100px auto;
    position: relative;
}

div:after {
    content: "";
    position: absolute;
    top: 100%;
    right: 0;
    border: 50px solid transparent;    
    border-top: 10px solid #369;
}
div+div:after {
    border-style: dashed;
    border-top-style: solid;
}