Subscribe and register service worker

gistfile1.html.erb

//app/views/content/index.html.erb

javascript:
   var vapidPublicKey = new Uint8Array(#{Base64.urlsafe_decode64($vapid_public).bytes});

   function checkNotifs(obj){
      if (!("Notification" in window)) {                                             //1
           console.error("This browser does not support desktop notification");
         }
         // Let's check whether notification permissions have already been granted
         else if (Notification.permission === "granted") {                           //2
           console.log("Permission to receive notifications has been granted");
           getKeys();
         }
         // Otherwise, we need to ask the user for permission
         else if (Notification.permission !== 'denied') {                            //3
           Notification.requestPermission(function (permission) {                    
                 // If the user accepts, let's create a notification
             if (permission === "granted") {                                         //4
               console.log("Permission to receive notifications has been granted");
               getKeys();                                                       
             } 
           });
        }
   }

     function getKeys(){
       navigator.serviceWorker.register('/serviceworker.js', {scope: './'})          //5
         .then(function(registration) {
           return registration.pushManager.getSubscription()
             .then(function(subscription) {
               if (subscription) {
                 return subscription;
               }
               return registration.pushManager.subscribe({                           //6
                 userVisibleOnly: true,
                 applicationServerKey: vapidPublicKey
               });
             });
         }).then(function(subscription) {
           sendKeys(subscription.toJSON())                                           //7
         });
     }

     function sendKeys(subscription){
       $.post('/sendkeys, {
           subscription: subscription,
           message: 'You clicked a button!'
         });
     }

Line 46:

 $.post('/sendkeys, {

should be

 $.post('/sendkeys`, {

right? :)