How To Run A Background Cloud Function And Schedule A Change In Database?

I'm developing an app using React Native and Firebase Realtime database. I want to do something like this. From the app, I set a time duration and press a button. Then, it writes d

Solution 1:

There is no built-in trigger to run after a certain delay that is written in the database.

But you can either build your own scheduler using Cloud Scheduler, or create a regularly running scheduled function that then checks for expired schedules in your database.

Also see:

• Cloud Functions for Firebase trigger on time?
• How to create cron jobs in firebase programmatically
• Executing cloud functions after n seconds on demand
• Firebase Functions, run after 15 minutes of user inactivity
• How can we get Firestore to trigger an event when a document's Date/Time field matches current time?
• Scheduled Cloud Functions Firebase
• the blog post How to schedule a Cloud Function to run in the future with Cloud Tasks (to build a Firestore document TTL)
• the article Dynamic Scheduled Background Jobs in Firebase