JSFiddle - React, Tailwind, and code Playground

HTML

<div id="data">
  <div class="img"><img src="imageurl_1"></div>
  <div class="img"><img src="imageurl_2"></div>
  <div class="img"><img src="imageurl_3"></div>
  <div class="img"><img src="imageurl_4"></div>
</div>

JavaScript

var urls = '';

       urls = urls + ' ' + $('#data').html();

alert(urls);