Navigation Timing

Navigation Timing

function supportsNavigationTiming() {
  return !!(window.performance && window.performance.timing);
}

var navigation = window.performance.navigation;
var navType = navigation.type;
var redirectCount = navigation.redirectCount;

window.addEventListener("load", function() {
  setTimeout(function() {
    var timing = window.performance.timing;
    var userTime = timing.loadEventEnd - timing.navigationStart;
    var dns = timing.domainLookupEnd - timing.domainLookupStart;
    var connection = timing.connectEnd - timing.connectStart;
    var requestTime = timing.responseEnd - timing.requestStart;
    var fetchTime = timing.responseEnd - timing.fetchStart;
    // use timing data
  }, 0);
}, false);