JSFiddle - React, Tailwind, and code Playground

HTML

<p>
   <a href=https://example.com/evil.eXe>Do not click</a>
</p>

<output></output>

CSS

body {
   font-family: system-ui, sans-serif;
   background-color: lightcoral;
   margin: 40px;
   }
output {
   font-size: 1.3rem;
   font-weight: bold;
   }

JavaScript

const link = $('a').first();

if (/[.]exe$/i.test(link.attr('href')))
   $('output').text('The link is evil.');

// From: 
//    https://stackoverflow.com/a/53555186