JSFiddle - React, Tailwind, and code Playground

HTML

<html>
<body>
<div id="example" style="background-image: url("//img1.wsimg.com/isteam/ip/c77f0810-0ea1-4425-b963-0e5820c70a3f/5a18a70f-82dc-45b6-bfb8-8f8e7ff1c875.jpg/:/cr=t:0%25,l:0%25,w:100%25,h:100%25/rs=w:1400,h:400,cg:true,m/cr=w:1400,h:400,ax:c,ay:c");">
foo
</div>
<div id="noImage">
bar
</div>
</body>
</html>

JavaScript

var elements = document.body.getElementsByTagName("*")

for (var i = 0 ; i < elements.length ; i++) {
 console.log(elements[i].style.backgroundImage)
 if (elements[i].style.backgroundImage) {
 	alert(elements[i].id + " has background image")
 }
}