Short demo using window.performance.navigation to determine whether page was reloaded

reloaded_or_not.js

// https://developer.mozilla.org/en-US/docs/Web/API/PerformanceNavigation
// https://blog.chromium.org/2017/09/chrome-62-beta-network-quality.html
// https://stackoverflow.com/questions/46226144/window-performance-navigation-type-works-in-ie-and-firefox-but-not-in-chrome

// This demo works as of 2017-11-01

const TYPE_RELOAD = 1;

function isReloadedPage() {
  return performance.navigation.type === TYPE_RELOAD;
}

function main() {
  if (!isReloadedPage()) {
    console.info('This page WAS NOT reloaded.');
  } else {
    console.info('This page WAS reloaded.');
  }
}