JSFiddle - React, Tailwind, and code Playground

by Alexey Mishin

HTML

<div class="outer">
  <div class="new">
    new
  </div>
</div>

CSS

.outer {
  width: 300px;
  height: 300px;
  margin: 20px auto;
  background-color: grey;
}

.new {
  position: relative;
  width: 80px;
  height: 30px;
  line-height: 30px;
  text-align: center;
  background-color: red;
  color: white;
}

.new::before, .new::after {
    position: absolute;
    content: '';
    border-left: 28px solid transparent;
    border-top: 28px solid white;
    border-right: 28px solid transparent;
}

.new::before {
  left: -28px;
}

.new::after {
  right: -28px;
}