Js error

<script type="text/javascript">
            var swpClickTracking = false; var swp_nonce = "71db6deea7";
function parentIsEvil() { var html = null; try { var doc = top.location.pathname; } catch(err){ }; if(typeof doc === "undefined") { return true } else { return false }; }; if (parentIsEvil()) { top.location = self.location.href; };var url = "https://www.coffeeloversmag.com/";if(url.indexOf("stfi.re") != -1) { var canonical = ""; var links = document.getElementsByTagName("link"); for (var i = 0; i < links.length; i ++) { if (links[i].getAttribute("rel") === "canonical") { canonical = links[i].getAttribute("href")}}; canonical = canonical.replace("?sfr=1", "");top.location = canonical; console.log(canonical);};        var within_timelimit;
        swp_admin_ajax = 'https://www.coffeeloversmag.com/wp-admin/admin-ajax.php';
        var swp_buttons_exist = !!document.getElementsByClassName( 'nc_socialPanel' );
        if ( swp_buttons_exist ) {
            jQuery( document ).ready( function() {
                var swp_check_for_js = setInterval( function() {
                    if( 'undefined' !== typeof socialWarfarePlugin) {
                        clearInterval(swp_check_for_js);
                                                var swp_cache_data = {
                            'action': 'swp_cache_trigger',
                            'post_id': 71,
                            'timestamp': 1511502254                     };
                                                // if( !swp_cache_data.timestamp ){ // error handling}
                        console.log( "Server Timestamp is " + swp_cache_data.timestamp );
                        var browser_date = Date.now();
                        if( !browser_date )
                            browser_date = new Date().getTime();
                        browser_date = Math.floor( browser_date / 1000 );
                        console.log( "Browser Timestamp is " + browser_date );
                        var elapsed_time = ( browser_date - swp_cache_data.timestamp );
                        if( elapsed_time > 60 ){
                            console.log( "Elapsed time since server timestamp is greater than 60 seconds -- " + elapsed_time + "seconds" );
                            within_timelimit = false;
                        } else {
                            console.log( "Elapsed time since server timestamp is less than 60 seconds -- " + elapsed_time + "seconds"  );
                            within_timelimit = true;
                        }

                        if( within_timelimit === true ){
                            jQuery.post( swp_admin_ajax, swp_cache_data, function( response ) {
                                console.log(response);
                            });

                            socialWarfarePlugin.fetchShares();
                        }
                    }
                } , 250 );
            });
            swp_post_id='71';
            swp_post_url='https://www.coffeeloversmag.com/';
            swp_post_recovery_url = '';

            //    socialWarfarePlugin.fetchShares();
        }
        </script>