<script>
jQuery(document).ready(function($) {
$('.copy-to-clipboard').on('click', function() {
var text = '20offproduct'; // replace with the text you want to copy
var $temp = $('<textarea>');
$('body').append($temp);
$temp.val(text).select();
document.execCommand('copy');
$temp.remove();

// Update the button text to "Copied!"
$(this).text('Copied!');

// Add the "clicked" class to the button
$(this).addClass('clicked');
});
});
</script>