<div class="modal-body">
    <p class="m-b-lg">...</p>
    <div class="text-right fz-sm">
        <a href="#" data-action="copy-link">Copy link</a>
    </div>
    <pre>
        Lorem ipsum...
    </pre>
</div>

$('[data-action="copy-link"]').on('click', function(event) {
    var code = $(this).find('pre').css('color', 'red');
});