JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html>

<body>
    
<script>
    var n = encodeURIComponent(http://example.com);
    var m = encodeURIComponent(http://example.com/1.jpg);
    
document.write("<a href=\"http:\/\/mysite.com\/button\/?url=' + n + '&media=' + m + '\" >my link<\/a>");

</script>

</body>
</html>