upsert-documents.md

const sdk = require('node-appwrite');

const client = new sdk.Client()
    .setEndpoint('https://<REGION>.cloud.appwrite.io/v1') // Your API Endpoint
    .setProject('<YOUR_PROJECT_ID>') // Your project ID
    .setSession(''); // The user session to authenticate with

const databases = new sdk.Databases(client);

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