JSFiddle - React, Tailwind, and code Playground

HTML

<div class="zufallsbild">
DIV
</div>

CSS

.zufallsbild {
  width: 50px;
  height: 50px;
  background-repeat: none;
}

JavaScript

var images = ['zufallsbild-1.png', 'zufallsbild-2.png', 'zufallsbild-3.png', 'zufallsbild-4.png'];
	$('.zufallsbild').css({'background-image': 'url(https://www.insignicom.de/files/insignicom/news-tech-blog/2018-03/' + images[Math.floor(Math.random() * images.length)] + ')'});