clipboard.js/assets/main.js

hljs.initHighlightingOnLoad();

document.addEventListener('DOMContentLoaded', function() {
    var clipboard = new Clipboard('.btn');
    var btns = clipboard.triggers;

    for (var i = 0; i < btns.length; i++) {
        btns[i].addEventListener('success', function(e) {
            console.info('Action:', e.detail.action);
            console.info('Text:', e.detail.text);

            e.currentTarget.classList.add('tooltipped', 'tooltipped-s');
            e.currentTarget.setAttribute('aria-label', 'Copied!');
        });

        btns[i].addEventListener('mouseleave', function(e) {
            e.currentTarget.classList.remove('tooltipped', 'tooltipped-s');
            e.currentTarget.removeAttribute('aria-label');
        });

        btns[i].addEventListener('error', function(e) {
            var flashes = document.querySelectorAll('.flash');

            for (var j = 0; j < btns.length; j++) {
                btns[j].disabled = true;
                flashes[j].textContent = e.detail;
                flashes[j].classList.remove('hidden');
            }
        });
    }
});