try {

        httpReq.send(param);

    } catch (e) {

        var pieces = navigator.userAgent.match(/Chrom(?:e|ium)\/([0-9]+)\.([0-9]+)\.([0-9]+)\.([0-9]+)/);

        if (pieces != null && pieces.length == 5) {

                pieces = pieces.map(piece => parseInt(piece, 10));

                ChromeVersion = pieces[1];

                if (ChromeVersion > 80 && FormData) {

                        var vars = param.split('&'),

                        i = 0,

                        pair,

                        key,

                        value,

                        formData = new FormData();

                        for (i = 0; i < vars.length; i++) {

                            pair = vars[i].split('=');

                            key = decodeURIComponent(pair[0]);

                            value = decodeURIComponent(pair[1]);

                            formData.append(key, value);

                        }

                        // We'll also inform it that we are unloading, potentially useful in the future.

                        formData.append('unloading', '1');

                        // The results is true or false, we don't get the response from the server. Make it look like it was a success.

                        navigator.sendBeacon(url, formData);

                        // This is what a success looks like when it comes back from the server.

                        return "true\n0";

                }

        }

        return false;

}