Is there a promise that works with Firebase?
The Firebase APIs return a Promise that works in all browsers. If you want to create your own Promises, consider using a library like Q. These Promise libraries allow you to write code that works in browsers that don’t yet have the official Promise class.
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How to sync, sync and promise in Firebase?
The following code takes a realtime database reference from Firebase and sets its value to “world”. Returning the result of set ensures that your function will continue to execute until the asynchronous job of writing the string to the database is fully completed: // Always change the value of “/hello” to “world”.
How to know when data is committed to Firebase database?
To know when your data is committed to the Firebase realtime database server, you can use a Promise. Both set() and update() can return a Promise that you can use to know when the write to the database is committed.
Where does the authentication object go in Firebase?
If the function succeeds, the user will be logged in, Firebase will store the authentication object in localStorage, and the function will return a UserCredential object to a promise. NOTE: If you’re new to promises (like I was when I started working with Ionic), don’t worry, check out this article.
How much is Cloud Functions free on Firebase?
On the Blaze plan, Cloud Functions provides a perpetual free tier. The first 2,000,000 invocations, 400,000 GB per second, 200,000 CPU per second, and 5 GB of egress Internet traffic are provided free of charge each month. You are only charged for usage in excess of this free allotment. The price is based on the total number of summons and the computation time.
How is the price of a firebase feature determined?
The price is based on the total number of summons and the computation time. Compute time is variable depending on the amount of memory and CPU provisioned for a function. Usage limits are also enforced through daily and 100 quotas. For more information, see Pricing for Cloud Functions.
What does it mean to have a presence system in Firebase?
Firebase makes it very easy to add presence to your app. A presence system is simply a way to share your status with other users. At a basic level, this state could be something simple, such as whether a given user is currently online or offline. Firebase is great at doing exactly that – sharing state.
