JSFiddle - React, Tailwind, and code Playground

HTML

<li class="clear2 clearfix" id="field_id16">
<span class="row_title">Link: </span>

<span class="row_data">
    <div class="field_uneditable">http://3.bp.blogspot.com/-O7KAb62ChqU/Tb_wIM-9zOI/AAAAAAAAACA/nG7EnK7xAmY/s1600/ydc9ntyrhmi63s0umu4a881dc4018f7_homer-reggae.jpg</div>
</span>

</li>

JavaScript

var elemento = document.querySelector('#field_id16 .row_data div');
console.log(elemento.innerHTML);
alert(elemento.innerHTML);