$$plugins.define('copy', function (element, options) {
    //copyButton: data-copy-btn
    //content to be copied: data-copy-text
    //tooltip: data-copy-tooltip

    const copyButton = element,
        copyButtonId = copyButton.getAttribute('data-copy-btn'),
        copyText = document.querySelector(`[data-copy-text='${copyButtonId}']`),
        tooltip = document.querySelector(`[data-copy-tooltip='${copyButtonId}']`);

    function copy() {
        var r = document.createRange();
        r.selectNode(copyText);
        window.getSelection().removeAllRanges();
        window.getSelection().addRange(r);
        document.execCommand('copy');
        window.getSelection().removeAllRanges();
        tooltip.classList.add('copyText__tooltip--open');
        setTimeout(function () {
            tooltip.classList.remove('copyText__tooltip--open');
        }, 1600);
    }

    copyButton.addEventListener("click", copy);
});