JSFiddle - React, Tailwind, and code Playground

HTML

<div>URLs are: <span id="r"></span></div>

http://google.com/ is a cool site but so is http://coolsite.co.uk/ and also what you need is to check out fakeurl.edu but that's a https://realprivateurl.info just so you know!

CSS

#r { background: yellow; }

JavaScript

var searchText = $('body').text(),
    urls = searchText.match(/\b(http|https)?(:\/\/)?(\S*)\.(\w{2,4})\b/ig);

for (var i = 0, il = urls.length; i < il; i++) {
    var $r = $('#r'),
        rh = $r.html();
    $r.html(rh + urls[i] + ', ');
}