upsert-documents.md

import { Client, Databases } from "react-native-appwrite";

const client = new Client()
    .setEndpoint('https://<REGION>.cloud.appwrite.io/v1') // Your API Endpoint
    .setProject('<YOUR_PROJECT_ID>'); // Your project ID

const databases = new Databases(client);

const result = await databases.upsertDocuments({
    databaseId: '<DATABASE_ID>',
    collectionId: '<COLLECTION_ID>',
    documents: [],
    transactionId: '<TRANSACTION_ID>' // optional
});

console.log(result);