JSFiddle - React, Tailwind, and code Playground
HTML
<a href="http://testpage.com/">
<script type="text/javascript">
var phrases = [ 1,2,3,4 ];
var scripts = document.getElementsByTagName('script');
var this_script = scripts[scripts.length -1];
this_script.parentNode.replaceChild(document.createTextNode(phrases[Math.floor(Math.random()*phrases.length)]), this_script);
</script>
</a>