JSFiddle - React, Tailwind, and code Playground

HTML

<div contenteditable="true">
    
    <a href="somewhere/relative.ext">Relative Link</a>
    
    <hr>
        
    <p>Try copying the above link here:</p>
        
        <span>pasteme!</span>
        
        <br>
            
            
      Then <button type="button" id="source">View source</button>

CSS

button { margin:1em }
span {color:#777}

JavaScript

$('#source').on('click',function(){
    alert($('div').html());
})