如何在analytics.js *异步中调整弹跳率

<script async src="https://www.example.com/analytics.js"></script>

window.analytics = window.analytics || [];
window.analytics.methods = ['trackSubmit', 'trackClick', 'trackLink', 'trackForm', 'pageview', 'identify', 'reset', 'group', 'track', 'ready', 'alias', 'debug', 'page', 'once', 'off', 'on'];
window.analytics.factory = function (method) {
    return function () {
        var args = Array.prototype.slice.call(arguments);
        args.unshift(method);
        window.analytics.push(args);
        return window.analytics;
    };
};
for (var i = 0; i < window.analytics.methods.length; i++) {
    var method = window.analytics.methods[i];
    window.analytics[method] = window.analytics.factory(method);
}
window.analytics.load = function (apiKey) {
    var script = document.createElement('script');
    script.type = 'text/javascript';
    script.async = true;
    script.src = ('https:' === document.location.protocol ? 'https://' : 'http://') + 'cdn.segment.com/analytics.js/v1/' + apiKey + '/analytics.min.js';
    var firstScript = document.getElementsByTagName('script')[0];
    firstScript.parentNode.insertBefore(script, firstScript);
};
window.analytics.load('YOUR_SEGMENT_API_KEY');

analytics.page('Page Name', {
    nonInteraction: 1
});