firestore-doc-size

Calculates the storage size of a firestore document

see: https://firebase.google.com/docs/firestore/storage-size

Usage

Install using your package manager of choice:

pnpm i firestore-doc-size

Import the appropriate docSize method.

If running on a server using the firebase-admin SDK, you should import:

import { docSize } from 'firestore-doc-size/firebase.server'

If running in a browser using the firebase SDK, you should import:

import { docSize } from 'firestore-doc-size/firebase'

Call the method with the full document path and data and it will give you the document size:

const size = docSize(snapshot.ref.path, snapshot.data())

Alternatively, import the docSizeConverter and use via the .withConverter(docSizeConverter) firestore option. This will add a _size property to the object returned via snapshot.data() (it will not be written to the database).

NOTE: in case you're wondering, the ".server" naming convention is a SvelteKit thing ...

Credit

There was an existing package, firestore-size, but I wanted something I could use with both the server (firebase-admin) and the client (firebase) SDK, plus some of the types have changed in the latest versions.