Can't register periodic sync in service worker

[simonferndriger]

I register the service worker at the very top of my app.js like this:

if('serviceWorker' in navigator) window.sw = navigator.serviceWorker.register('serviceworker.js', { type: 'module' }) .then(() => navigator.serviceWorker.ready) ;

Then I try to register a periodic sync like this:
sw.then(reg => reg.periodicSync.register('notification-check', { minInterval: 24 * 60 * 60 * 1000 })

Nothing happens, no warning, no error and also no event in the service worker. I assume it probably has nothing to do with AlpineJS, but since I ran out of things to check otherwise at https://stackoverflow.com/questions/79728229/serviceworker-not-reacting-on-periodicsync-event I hope it's OK to ask nevertheless?

[simonferndriger]

Full code:

 if('serviceWorker' in navigator)
   window.sw = navigator.serviceWorker.register('serviceworker.js', { type: 'module' })
      .then(() => navigator.serviceWorker.ready);

//------------------------------------------------------------
async updateService(register, onSuccess){
//------------------------------------------------------------
  if(!app.user.account)
    location.href = 'account';
  
  navigator.permissions.query({ name: 'periodic-background-sync' }).then(status => {
    if(status.state !== 'granted')
      return sw.then(reg => {
        reg.periodicSync ? 
          (app.webApp.installer ? app.webApp.install() : onSuccess())
        :
          onSuccess()
        ;
      })
    ;

    sw.then(reg => reg.periodicSync[register ? 'register' : 'unregister']('notification-check', {
      minInterval: 24 * 60 * 60 * 1000
    })
    .then(() => onSuccess()))
    .catch(e => console.warn(e))
    ;
  });
},   

[simonferndriger]

Service Worker

//------------------------------------------------------------------------------------
self.addEventListener('periodicsync', event => {
//------------------------------------------------------------------------------------
  switch(event.tag){
  //----------------------------
  case 'notification-check':
  //----------------------------
    console.debug('Update Check Sync');
    event.waitUntil(notify.checkForUpdates());
    break;

  //----------------------------
  default:
  //----------------------------
    console.warn('Unknown Periodic Sync', event);
  }
});

[simonferndriger]

The only console output I get is the one from pressing the test button:

[simonferndriger]

I used a different name for the tag and it works now...