refs loses track when changing rapidly

[sacrosanctic]

Operating System

WIN11

Browser Version

Chrome/118

Firebase SDK Version

10.5.2

Firebase SDK Product:

Firestore

Describe your project's tooling

sveltekit with firebase

Describe the problem

I am trying to a list of documents with pagination using, limit, limitToLast, startAfter, and endBefore.

Steps and code to reproduce issue

demo: https://svelte-firebase-nine.vercel.app/
repro: https://github.com/ammarriq/svelte-firebase

In this demo, when clicking next and previous, it will lose track of the reference randomly

[MarkDuckworth]

@sacrosanctic, I'm having trouble understanding the problem or reproducing with your demo. Can you tell me more about "it will lose track of the reference"? Which reference is lost? What's the behavior you are seeing in code to indicate that the reference "is lost"?

[sacrosanctic]

I was referring to the collection snapshot/reference. Let me try with as video.

Recording.2023-11-03.143823.mp4

As I navigate between pages, the No. will go out of sync, the total documents retrieved will vary, and eventually, it will simply return no data.

The bug is not consistent, it can happen in 1-2 clicks or 10 or more.

[MarkDuckworth]

I think you might have a bug in your application that results in sending bad data to Firestore which is returning an empty result set. Consider putting some logging where you call getDocs(...) and ensure you're calling Firestore with the expected data. Could your application allow multiple click handlers to run before the first finishes?