changedetection.io/changedetectionio/static/js/watch-settings.js

$(document).ready(function () {
    $('#notification-setting-reset-to-default').click(function (e) {
        $('#notification_title').val('');
        $('#notification_body').val('');
        $('#notification_format').val('System default');
        $('#notification_urls').val('');
        e.preventDefault();
    });
    $("#notification-token-toggle").click(function (e) {
        e.preventDefault();
        $('#notification-tokens-info').toggle();
    });
});