JSFiddle - React, Tailwind, and code Playground

by Alexander Sevirinov

HTML

<div class="container">
  <div class="banner">
    <img src="http://via.placeholder.com/301x504" alt="image">
    <button class="btn"><span>Смотреть</span></button>
  </div>
</div>

CSS

.banner {
  display: inline-block;
  position: relative;
}

.banner .btn {
  position: absolute;
  right: 0;
  bottom: .5rem;
  height: 0;
  width: 200px;
  background: transparent;
  border-width: 0 0 48px 50px;
  border-color: transparent transparent #009FD6 transparent;
  border-style: solid;
  display: inline-block;
}

.banner .btn span {
  position: absolute;
}

.banner .btns:before {
  content: "";
  display: inline-block;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 0 3.1rem 24px;
  border-color: transparent transparent #009FD6 transparent;
  position: absolute;
  top: 0;
  left: -1.5rem;
}