document.addEventListener("DOMContentLoaded", function() {
        function getFediverseHandle() {
            const url = window.location.href;
            const prefix = "?@";
            const index = url.indexOf(prefix);
            if(index !== -1) {
                return decodeURIComponent(url.substring(index + prefix.length));
            }
            return null;
        }
        var fediverseHandle = getFediverseHandle();
        if(fediverseHandle) {
            document.getElementById('txt_mastodon_handle').value = fediverseHandle;
            (async() => await circleMain())();
        }
    });