pastepass/web/static/pastepass.js

function copyText(event, selector) {
    var pastedContent = document.querySelector(selector);

    // Create a range and select the text
    var range = document.createRange();
    range.selectNode(pastedContent);
    window.getSelection().removeAllRanges();
    window.getSelection().addRange(range);

    // Copy the selected text
    if (navigator.clipboard) {
        navigator.clipboard.writeText(pastedContent.innerText).then(function () {
            event.dataset.tooltip = 'Copied!';
            event.innerText = 'Copied!';
            setTimeout(function () {
                event.innerText = 'Copy content';
                event.dataset.tooltip = 'Click to copy';
                event.blur();
            }, 1000);
        });
    }
}