(function () {
    const APP_ID = 'eag7vx1p';

    window.intercomSettings = {
        app_id: APP_ID,
    };

    var w = window;
    var ic = w.Intercom;
    if (typeof ic === 'function') {
        ic('reattach_activator');
        ic('update', w.intercomSettings);
    } else {
        var d = document;
        var i = function () {
            i.c(arguments);
        };
        i.q = [];
        i.c = function (args) {
            i.q.push(args);
        };
        w.Intercom = i;
        var l = function () {
            var s = d.createElement('script');
            s.type = 'text/javascript';
            s.async = true;
            s.src = 'https://widget.intercom.io/widget/' + APP_ID;
            var x = d.getElementsByTagName('script')[0];
            x.parentNode.insertBefore(s, x);

            w.GitBook.addEventListener('unload', () => {
                if (!ic) {
                    return;
                }

                ic('shutdown');
                w.Intercom = undefined;
            });
        };
        if (w.attachEvent) {
            w.attachEvent('onload', l);
        } else {
            w.addEventListener('load', l, false);
        }
    }
})();