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Service worker promise.then is not defined


Service worker promise.then is not defined

By : Eric C
Date : November 22 2020, 03:01 PM
I wish this help you "Cannot read property 'then' of undefined" tells you that doSomethingAsync() call does not return an object with then property. I would to say that doSomethingAsync must return Promise. The Promise object has then method on its prototype (MDN), so you can call it. Try this
code :
function doSomethingAsync() {
  return new Promise(resolve => {
    console.log("ASYNC LOL");
    resolve();
  })
}
function doSomethingAsync() {
  console.log("ASYNC LOL");
  return Promise.resolve();
}


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Service Worker Background Sync - On rejecting promise - there are no retries from the waitUntil?

Service Worker Background Sync - On rejecting promise - there are no retries from the waitUntil?


By : GreenLiquidOranges
Date : March 29 2020, 07:55 AM
I wish this helpful for you It's down to the browser to decide when the failed sync event should be retried. Also, it won't retry infinitely, but you know it's the last attempt via syncEvent.lastChance (spec).
Looking at your code above, databaseGet expects (type,db), but you call it databaseGet('posts'), so that'll throw an error when you try and access properties of db, which is undefined. Chrome's devtools should show this, especially with "break on caught errors".
Service worker notification promise broken?

Service worker notification promise broken?


By : Jakub
Date : March 29 2020, 07:55 AM
it fixes the issue I am not sure what exactly you mean of getting hold on notification ? if you are looking to capture an event when user will click on notification, you can do by adding listener.
add return .
code :
return registration.showNotification('Laff', {
    self.addEventListener('notificationclick', function (event) {

        var tag = event;
}
How to fix importScripts not defined using service worker and onesignal?

How to fix importScripts not defined using service worker and onesignal?


By : user3197125
Date : March 29 2020, 07:55 AM
With these it helps I can see a couple potential issues.
1) If you are attempting to importScripts from a service worker, that needs to be executed at the top of the file and not in a method. In other words, it needs to be the first thing that runs within your service worker.
How to fix 'Uncaught (in promise) bad-precaching-response' error with service-worker + angular

How to fix 'Uncaught (in promise) bad-precaching-response' error with service-worker + angular


By : user3200205
Date : March 29 2020, 07:55 AM
With these it helps Exclude swagger-ui from the workbox precache manifest by adding exclude: [/swagger-ui/] to the config in the call to WorkboxPlugin.GenerateSW in webpack/webpack.prod.js. Most users won't access that page so it's a good idea to exclude it from precaching.
code :
new WorkboxPlugin.GenerateSW({
  clientsClaim: true,
  skipWaiting: true,
  exclude: [/swagger-ui/]
})
Uncaught (in promise) DOMException: Subscription failed - no active Service Worker

Uncaught (in promise) DOMException: Subscription failed - no active Service Worker


By : mol3
Date : March 29 2020, 07:55 AM
hop of those help? You should wait for the service worker to be activated before triggering the subscription.
use stateChange listener for figuring out if service worker is active
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