JSFiddle - React, Tailwind, and code Playground

HTML

<img src="test">
<script src="test2"></script>
<a href="test3"></a>
<p>Test</p>

JavaScript

var srcNodeList = document.querySelectorAll('[src],[href]');
for (var i = 0; i < srcNodeList.length; ++i) {
  var item = srcNodeList[i];  // Calling myNodeList.item(i) isn't necessary in JavaScript
    if(item.getAttribute('src') !== null){
         alert(item.getAttribute('src'));
    }
    if(item.getAttribute('href') !== null){
         alert(item.getAttribute('href'));
    }
}