parsley/app/javascript/lib/ServiceWorker.js

function trackInstall(worker, cb) {
  // worker.addEventListener('statechange', function() {
  //   //If the worker is now installed, let the user know that there is an update ready
  //   if (worker.state == 'installed') {
  //     cb();
  //   }
  // });
}

export function swUpdate() {
  // navigator.serviceWorker.getRegistration().then(reg => {
  //   if (reg && reg.waiting) {
  //     reg.waiting.postMessage("skipWaiting");
  //     window.location.reload(true);
  //   }
  // });
}

export function swInit(store) {

  if ('serviceWorker' in navigator) {
    window.addEventListener('load', () => {
      navigator.serviceWorker.register('/packs/sw.js').then(registration => {
        console.log('SW registered: ', registration);
      }).catch(registrationError => {
        console.log('SW registration failed: ', registrationError);
      });
    });
  }


  // const updateReady = () => store.commit("setUpdateAvailable", true);
  //
  // if ('serviceWorker' in navigator) {
  //   navigator.serviceWorker.register('/sw.js')
  //     .then(function (reg) {
  //       console.log('Registration succeeded. Scope is ' + reg.scope);
  //
  //       if (reg.waiting) {
  //         updateReady();
  //       }
  //
  //       // If there's an updated worker installing, track its progress. If it becomes "installed", call
  //       // indexController._updateReady()
  //       if (reg.installing) {
  //         trackInstall(reg.installing, updateReady);
  //       }
  //
  //       reg.addEventListener('updatefound', function () {
  //         trackInstall(reg.installing, updateReady);
  //       });
  //
  //     }).catch(function (error) {
  //       console.log('Registration failed with ' + error);
  //     });
  // }


}