React Firebase Database

Sign up for a Firebase account and create a new project. It supports Firebase Realtime Database and Firebase Storage. Firebase is a great option when you don't have a backend or existing API to work with, since you can build a mobile app without setting up any infrastructure. The comprehensive step by step tutorial on building Firestore Database CRUD Web Application using React. Following the docs we structured the data in a flat fashion to avoid nesting data which would incur in downloading more data thus higher bills, we will talk about that later… Here is an example of our database. having built a couple of projects with React Create App). Thanks to all of SitePoint's peer reviewers for making SitePoint content the best it can be! React Native is one of the most popular choices for. We are going to continue from where we left of in the last tutorial which can be found here. js to build a really simple front end. Currently react-redux-firebase still handles auth when using redux-firestore - The future plan is to also have auth standalone auth library that will allow the developer to choose which pieces they do/do not want. If you have followed this post in its entirety, you are now ready to build your Vue apps with Firebase Authentication and Database. If you haven't read the first post in the series , I encourage you to do so. The onGetInvite prop is called when the component is mounted. Every subitem should be indexed under a stable unchanging sequences of keys. ref ('/posts'). Instructor Ray Villalobos shows you how create React components, add user authentication and authorization, and integrate a Firebase database with custom routing. UPDATE November 28th 2016. In this part we are going to learn how to use real-time database provided by firebase for storing and retrieving database entries. React Native Firebase is built with four key principals in mind; 🧪 Well tested. Previously, we have created a tutorial of Firebase Firestore Database using React Native. There is another way to use Firebase database store as an API instead of referring to it, you can directly add in the source code like we did in our application. In this post, I will dive into how you can connect Firebase, specifically Cloud Firestore, to your React + Redux application. The starter also contains Firebase Authentication (Email and social). js, Google Firebase, and Postman to create push notifications in their PWAs. This creates a one-way binding from the Firebase reference to this. For a backend, we're going to utilize the fantastic Firebase database (a real-time data JSON database now owned by Google). Firebase is a fantastic, real-time Backend-as-a-Service (BaaS, for short) now run by Google. This book teaches you pragmatic Firebase in React for business applications with a minimal tech stack. In Firebase, data access and data validation are controlled by their rule definitions. 0) released. Select Start in test mode and then Enable. One for your firebase project and another for your Hosting URL. - $ react-native run-ios (run in iOS) - Replace the firebase configuration with your own account. By the end of this tutorial, you should be able to pull data from Firebase into Redux, update that data in real-time, and display that data in your screens and components. #Firebase with #ReactNative on both #iOS and #android made simple. The book dives into the combination of both libraries and implements with you a web application along the way with authentication and a realtime database. When you save your JSON data to Firebase, changes are sent instantly to all clients, web and mobile, that requested them. Then install firebase and Bootstrap Creating config. Firebase as a backend with React is a great choice as it is easy, powerful, and provides great developer experience. The steps are as follows: First create a new react native project: react-native init ProjectName Turn on. Like menu content, categories, orders etc. Learn about the get, create, update and remove operations, how to enable pagination and how to order your list of data, and how fo associate items with each other. A firebase data provider for the React-Admin framework. 1) React Native Firebase Starter kit comes with AdMob pre-install. You have now successfully integrated and stored user data in the Firebase Firestore database. Learn More The React Native Firebase documentation is a great place to get started, however if you're looking to learn more about the library or thinking about contributing check out these resources. In this tutorial, we will be learning how to integrate Firebase and Firestore cloud database with a React application. Let's hope they can find a fix for this soon. You are now ready to deploy the database rules using the following command: yarn deploy Et voilà! You are up and running with your own Firebase backend. Mayur Tanna is a Senior Big Data Consultant working with CIGNEX Datamatics. It can be your best bet when it comes to changes like data synchronization and offline data modification. React Native Firebase is a well tested, feature rich Firebase implementation for React Native, supporting both iOS & Android platforms for 15+ Firebase modules. And in Firestore is where our actual data is. You will build 3 different React Native apps. Make complete React apps from scratch, from setting up their dev environment to deployment on the web. The Firebase Realtime Database can be accessed directly from a mobile device or web browser; there's no need for an application server. See this blog post or this repo for a way to use automatic deployment to Azure App Service. Nirmalya Ghosh shows you how to use Firebase's real-time database features, coupled with create-react-app, to build a basic Reddit clone with live voting. In this tutorial, I'll show you how to build a simple chat application with React Native and Firebase. Then, you'll integrate react-native-fbsdk into your React Native project to enable the Facebook login. Adding to Existing Data in Firebase. json - The min configuration file. A new document database Cloud Firestore is in beta and it's awesome. These rules tell Firebase to only allow users who are authenticated to read and write from the database. 1 Intro to Firebase. We will create a bare minimum demo application from scratch with the help of Firebase & React Native to see how they work together and understand the differences between a Firestore database and a Real-time Database in Firebase. Firebase gives you the tools and infrastructure to build better apps and grow successful businesses. If you are using any of the Firebase features you have to integrate Firebase in your project. Callbacks are removed by calling the off() method on your Firebase database reference. You will learn how to implement user management with authentication and authorization, how to manage a Firebase database, and how to deploy your application. Firebase nodes act as the centralized stores in a React application, taking care of getting the initial data, listening to changes, and ensuring that data remains consistent across separate components. Model data for performant Firebase apps. In this course, we're going to be working with Firebase which is a real-time user database from Google. npx create-react-app react-with-firebase-hosting cd react-with-firebase-hosting yarn start. Join us in this series as we take React and build a chat application that leverages Firebase for all of the backend services. I co-authored React Router and now build OSS at Reach. Thanks to all of SitePoint's peer reviewers for making SitePoint content the best it can be! React Native is one of the most popular choices for. React webpage: https://facebook. Learn React from scratch with Redux and Firebase(database) to build web apps with Authentication and CRUD features. It supports Firebase Realtime Database and Firebase Storage. Before starting, it's helpful to have a basic understanding of hooks, firebase authentication and firestore. For this purpose, you can use Firebase. The Data page provides an overview of the data contained in your Firebase Database. If you are building a complex application you will need a REST API to function as the back-end while your React application acts as the front-end. We got the data from the firebase user database. React-Native Firebase Auth iOS provides you simpler implementation of firebase authentication for iOS, it uses MobX for state management. This is not an "intro to React Native" tutorial so we won't cover basic things, but only Firebase specific topics, so you will need some React Native knowledge to keep up with the pace. React Lifecycle Methods- how and when to use them. The source code is on GitHub. This book will cover the essentials of Firebase and React. React Router is used to handle all web-side routing. Lastly, Firebase will ask to specify a folder which will contain all the files to be deployed to Firebase Hosting. Firebase Realtime Database With React Native After creating a project it will show you welcome screen Select Add Firebase to your web app , and copy that credentials, it will be useful in future. You’ll set up. Design simple views for each state in your application, and React will efficiently update and render just the right components when your data changes. 0 of React Native Firebase. But first, you need to create a new Firebase project. And in Firestore is where our actual data is. Now we’re done configuring Firebase, and can jump into React Studio. If you need to authenticate to access your data, check out @react-firebase/auth. React and Firebase Authentication Using Email and Password By kingsley Silaschijiok Authentication in React can be a complex feature to put in place. And with React Native, app development became a lot easier for JavaScript developers. View Ernesto Molina Carrón’s profile on LinkedIn, the world's largest professional community. React is a powerful and effective JavaScript library. Or update in linked application will update in the Tool too. As will become clear early in this chapter, reading data from a. Now that our placeholder data is in place, we can take a look at our rules by clicking on the rules tab in our database. Some React. In this post we will explore creating a React application with a Firebase backend. redux-thunk executes the function to get data from Firebase database. Firebase is a realtime database for the modern web. js (Recommended version) React. 0 SDK which now supports the Firebase Realtime Database and Firebase Authentication. So for firebase realtime database the structure for above database will be. My firebase datbase looks like this: Now I want to put this data into a calender, so I want only the date from one userID. Now that our placeholder data is in place, we can take a look at our rules by clicking on the rules tab in our database. Firebase v3. REACT_APP_FIREBASE_SENDER_ID} const app = firebase. Create an account in Firebase with your google account. You will build 3 different React Native apps. For the data part, I decided to use Google's Firebase. And it uses Material Design and Flexbox layout for the UI, along with React. The Road to React with Firebase. Firebase's brand new Cloud Firestore improves upon their Realtime Database with several enhancements but most notably it will continuously attempt to sync data while offline. Firebase란? 2016 Google I/O에서 발표한 가장 혁신적인 기술로 꼽히는 BAAS(Backend as a service)입니다. If you need to authenticate to access your data, check out @react-firebase/auth. npm install firebase –save Open index. react-redux-firebase provides the firestoreConnect HOC (similar to firebaseConnect) for easy setting/unsetting of listeners. You will make use of a number of Firebase features. Application Shell + data caching with Workbox HNPWA with React taehwanno/hnpwa-react. Our SDKs, libraries, samples, and demos all live on GitHub. You'll import this config into your App. From there, we generate the database validation and security rules and the flow types used within the React Native project. Update in Firebase Admin will update Firebase. I co-authored React Router and now build OSS at Reach. Manage Users with Firebase's Realtime Database in React. A set of reusable React Hooks for Firebase. # Firebase. Our app is listening for notifications. React Native Firebase is a collection of official React Native modules connecting you to Firebase services; each module is a light-weight javascript layer connecting you to the native Firebase SDKs for both iOS and Android. js` file and update our configuration so that we'll be able to use Google as our third party authentication Provider. This book will cover the essentials of Firebase and React. Firebase is a great option when you don't have a backend or existing API to work with, since you can build a mobile app without setting up any infrastructure. This one will probably be the longest because there are few things to do to set everything up. React Native Firebase is a light-weight javascript layer connecting you to the native Firebase SDKs for both iOS and Android which aims to mirror the official Firebase Web SDK as closely as possible. You will make use of a number of Firebase features. Firebase RealTime Database. React Native Firebase is built with four key principals in mind; 🧪 Well tested. By the end of this tutorial, you should be able to pull data from Firebase into Redux, update that data in real-time, and display that data in your screens and components. Firebase offers you realtime NoSql database where items are saved as JSON objects. Checking the data. React is a JavaScript library for building user interfaces. A firebase data provider for the React-Admin framework. Combining Firebase with Create React App is pretty. Installing Firebase and Reactfire via npm into a new React app; Adding your Firebase API key to your React component; Initializing Firebase in your React component; Declaring Facebook as your login provider with provider = new firebase. js radar charts. You build a server, you observe data on Firebase, you use the API to send notifications. Detach listeners. Firebase ️ Open Source The Firebase community runs on open source. initializeApp (config) const base = Rebase. I am also using TypeScript because it has a lot of advantages when used with React and Redux. The problem. Firebase Realtime Database is a cloud-hosted database that helps us to store and sync data with NoSQL database in realtime to every connected client platforms like Android, iOS, and Web. We'll show you how to build functions that react to Firebase Auth, Cloud Storage and Firebase Realtime Database events. we introduced how to display Google Admob using react-native-firebase library in RN(react native) project. React Native with Push Notifications and Firebase - Part 3 of 5 How to create, setup and configure a React Native project with Push Notifications support using Firebase SDK and API - Part 3 of 5: Create the Firebase project(s) and configure the Service APIs for Android and iOS. Although the official Firebase JS SDK will work with React Native; it is mainly built for the web and has a limited feature-set compared to native. Deploy the App to Firebase Hosting. Today we will learn firebase integration in react. • The base class's implementation of this method always returns true (the component should re-render). Now it is time to start building a real app with these techniques. Now that our placeholder data is in place, we can take a look at our rules by clicking on the rules tab in our database. Learn every major part of Firebase 5–the real-time database, storage, rules, listeners and deployment with Firebase tools. The Firebase support team replied to this issue: It seems that the issue stems from react-native-fetch-blob, which had a bug that kept it from working properly with the 3. React, React Native and Front End Developer Ezpeed outubro de 2017 – fevereiro de 2018 5 meses. Just press Enter and Firebase will create a "database. In this tutorial you're going to learn how to use Firebase Real Time Database service in React application. First you have to go to Firebase and create new firebase project. iOS Cocoapods. gatsby new react-gatsby-firebase-authentication https://github. You will make use of a number of Firebase features. Working as a mobile developer analyst with Android, React Native and Ionic, as well as working as a fullstack in. The two screenshots from above illustrate the exact data flow necessary to trigger push notifications in React Native using Firebase. Elegant User Interface. Firebase provides very little guidance on how to structure your unstructured JSON data. having built a couple of projects with React Create App). Firebase is a cloud service designed to power real-time, collaborative applications. The application should be the perfect starter project to realize your ideas. 🔥 Created with 💛 by @invertaseio. In this tutorial, you will learn how to integrate the Firestore cloud database in a React Native app. In this blog, we will learn about how to integrate and receive firebase notification in React Native Android App. This React-NativeFirebase starter app is made for beginners who want to learn to integrate React-Native with Firebase. It has a real-time database service. We will create a bare minimum demo application from scratch with the help of Firebase & React Native to see how they work together and understand the differences between a Firestore database and a Real-time Database in Firebase. This is reflected in this todo list app in the way async actions are used in the Middleware, and how some actions are handled in the Middleware and others in the Reducer. To handle this connection and CRUD operation we use the React Native Firebase Library. We then create two instance variables: db and ideasCollection. Design simple views for each state in your application, and React will efficiently update and render just the right components when your data changes. Simply add the Firebase library to your application to gain access to a shared data structure; any changes you make to that data are automatically synchronized with the Firebase cloud and with other clients within milliseconds. Manage Users with Firebase's Realtime Database in React. You'll use Firebase to provide a real-time database for your project. The Data page provides an overview of the data contained in your Firebase Database. firebase login --reauth In. Plus, store media files in Firebase Storage and use Cloud Functions with Server Workers to set up notifications with Firebase Cloud Messaging. React Native is one of the best frameworks to build hybrid mobile applications compatible with both Android and iOS platforms. Robin Wieruch. Previously, we have created a tutorial of Firebase Firestore Database using React Native. This tutorial is the second part of react native firebase series. 1 Intro to Firebase. This website uses cookies to ensure you get the best experience on our website. Next we look at fetching data from the database and look into the Firebase security rules and how to structure your firebase database, before we look into firebase storage. Deploy React app to firebase. React Native Firebase has since provided support for using it on both Android & iOS in React Native, right from day one of the release. on ('value', function (snapshot) { console. React Native with Push Notifications and Firebase - Part 3 of 5 How to create, setup and configure a React Native project with Push Notifications support using Firebase SDK and API - Part 3 of 5: Create the Firebase project(s) and configure the Service APIs for Android and iOS. Start integrating Firebase services with the React Native Firebase v6 packages. One of the new exciting features announced at the Google Cloud Next '17 Conference this. react native gh notetaker: Native app to browse a user's Github repos, take notes on the person. componentDidMount() { this. On March 10th, 2017, Google released Firebase Cloud Functions. Firebase's first product was the Firebase Real-time Database, an API that synchronizes application data across iOS, Android, and Web devices, and stores it on Firebase's cloud. Let's hope they can find a fix for this soon. React Firebase Auth React Firebase Firestore React Firebase Realtime Database Firebase Data Generator Firestore Data Generator JSON Data Generator. Save your firebase settings and click Database in the left sidebar. In this course you will learn to build User Interface using React, manage state using Redux and make CRUD (create, read, update, delete) operations with Firebase, which is a Realtime Database in the cloud by Google. Firestore is a noSQL database that you can use to store and fetch user generated data. Firebase's first product was the Firebase Real-time Database, an API that synchronizes application data across iOS, Android, and Web devices, and stores it on Firebase's cloud. One of the new exciting features announced at the Google Cloud Next '17 Conference this. Let's get started. Wire Data in Your App to Firebase Database. This React-NativeFirebase starter app is made for beginners who want to learn to integrate React-Native with Firebase. In XCode, in the project navigator, right click Libraries Add Files to [your project's name] Go to node_modules react-native-firebase-phone-auth and add RNFirebasePhoneAuth. You will discover building React components, using Firebase observers to sync data to your front-end application, the difference between Stateful and Stateless Functional Components, and much more. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. The steps are as follows: First create a new react native project: react-native init ProjectName Turn on. gatsby new react-gatsby-firebase-authentication https://github. Then, you'll integrate react-native-fbsdk into your React Native project to enable the Facebook login. Here we are writing and reading data from the database using multiple platforms. ให้ทำการ คัดลอกค่า ที่อยู่ในตัวแปร var config ของ firebase เก็บไว้ก่อนครับ (เราจะนำค่านี้ไปใส่ใน React อีกครั้งครับ). With ReactFire it only takes a few lines of JavaScript to. To use Firebase Database in our React app, we'll need to import the firebase javascript library and configure it with our Firebase application keys, which can be found in the Firebase Console. View the full react-native-firebase documentation. js Academy for Beginners with Firebase, Learn React by building a Trello inspired application with a realtime database & authentication!, NEW, Created by Chris Dixon, English [Auto-generated] PREVIEW THIS COURSE - GET COUPON CODE. Single page applications(SPA) are quite famous these days, they are easy to build thanks to all the available libraries and framework. In this tutorial, you have learned about how to setup react native project with expo and firebase. It supports Firebase Realtime Database and Firebase Storage. Learn every major part of Firebase 5–the real-time database, storage, rules, listeners and deployment with Firebase tools. Next we look at fetching data from the database and look into the Firebase security rules and how to structure your firebase database, before we look into firebase storage. View the full react-native-firebase documentation. Now, we have created the same tutorial for React. Deploy React app to firebase. js file where we will initialize our app with the configuration details we got from our firebase project and also export the messaging. UPDATE November 28th 2016. Using Google Cloud Functions, you will add custom logic to your Firebase backend. Installing Firebase and Reactfire via npm into a new React app; Adding your Firebase API key to your React component; Initializing Firebase in your React component; Declaring Facebook as your login provider with provider = new firebase. Traditionally people used servers for that. Pesquise outras perguntas com a tag firebase react react-native maps realtime-database ou faça sua própria pergunta. json – Consists of the database rules for Firebase. In this course, Tuts+ instructor Andrew Burgess will show you how to use it to build a multi-user web application from start to finish. Currently react-redux-firebase still handles auth when using redux-firestore - The future plan is to also have auth standalone auth library that will allow the developer to choose which pieces they do/do not want. log (snapshotToArray (snapshot)); }); If you are using a transpiler like Babel, writing using TypeScript or targeting evergreen browsers like Chrome and Firefox,. - $ react-native run-ios (run in iOS) - Replace the firebase configuration with your own account. npm i react-native-firebase --save npm i react-native-facebook-login --save. Firebase is a cloud service designed to power real-time, collaborative applications. Step 1 – Server Script to collect data. This is reflected in this todo list app in the way async actions are used in the Middleware, and how some actions are handled in the Middleware and others in the Reducer. This is an introductory tutorial, which covers the basics of the Firebase platform and explains how to deal with its. Firebase Realtime Database With React Native After creating a project it will show you welcome screen Select Add Firebase to your web app , and copy that credentials, it will be useful in future. Adding to Existing Data in Firebase. If you don't have one, you can create a firebase account here. This can be helpful when you are setting up your database structure for the first time. Firebase and MongoDB can both be used as a service. The Firebase Realtime Database can be accessed directly from a mobile device or web browser; there’s no need for an application server. Data is synced across all clients in realtime, and remains available when your app goes offline. Já fiz a instalação e o import do Firebase no projeto, o código esta assim: componentWillMount(){ var config = { apiKey: "**. Let's hope they can find a fix for this soon. This starter contains two chat themes integrated with Firebase for a complete chat app. When using the Firebase SDK for Cloud Functions your code will live under the functions directory. React Firebase Auth React Firebase Firestore React Firebase Realtime Database Firebase Data Generator Firestore Data Generator JSON Data Generator. In this tutorial, you will learn how to integrate the Firestore cloud database in a React Native app. It supports Firebase's Realtime Database, Firestore, Storage and Authentication (except phone auth). Choose The Best NoSQL Database: Firebase Vs MongoDB for 2019 & 2020. You want to use the new Firestore database from Google, but don't want to have to use redux or any other state management tool. Firebase is a backend platform for building Web, Android and IOS applications. Let's start with Auth. Building single-page apps with React - [Instructor] It's time to start working with a database. plist [iOS] and the AndroidManifest. I also used Firebase auth and Material Design to craft a real-world app. Create a Firebase Project. Create a firebase project in the Firebase console. You'll use Firebase to provide a real-time database for your project. React and Firebase Authentication Using Email and Password By kingsley Silaschijiok Authentication in React can be a complex feature to put in place. # Firebase. Conclusion. The foundation of a Firebase app is the database. It maps collections from the Firebase database (Firestore) to your react-admin application. After chatting with Jacob Turner, we wanted to create a way to allow the one way binding of ReactFire with ES6 classes along some more features like two way data binding and listening to Firebase endpoints without actually binding a state property to them. Next we look at fetching data from the database and look into the Firebase security rules and how to structure your firebase database, before we look into firebase storage. And in Firestore is where our actual data is. Manage Users with Firebase's Realtime Database in React. we mentioned at previous blog post that Firebase Analytics automatically is started by configuring react-native-firebase. Firebase gives you the tools and infrastructure to build better apps and grow successful businesses. It uses Redux to manage the internal state of the application. js Academy for Beginners with Firebase, Learn React by building a Trello inspired application with a realtime database & authentication!, NEW, Created by Chris Dixon, English [Auto-generated] PREVIEW THIS COURSE - GET COUPON CODE. We need to. The onGetInvite prop is called when the component is mounted. ref ('/posts'). Just press Enter and Firebase will create a "database. Setting up your React application. Set Up Firebase Create New Firebase App. If you're not familiar with Angular or React, do not worry. js (Recommended version) React. Firebase Realtime Database is a cloud-hosted database that helps us to store and sync data with NoSQL cloud database in realtime to every connected client. Let's get started. We develop cross-platform apps using React Native Technology and provide budget-friendly tech solutions to our clients. A React with Firebase tutorial on how to work with Firebase's realtime database in React. You can also make use of this awesome chat starter with our Spotify styled and Netflix styled React Native apps. Deploy React app to firebase. A firebase data provider for the React-Admin framework. Well, actually ReactJS is basically a view library that runs on your browser, and it's main goal is to render everything that user sees on their device (browser, mobile app in case of react-native). You will learn how to setup a register, login and logout mechanism in React with Firebase, how to access the application with Facebook and Google, and how to manage your data in the Firebase database. This will help you not only to store your data, but also to be subscribed to any database changes as they happen. Make sure to read till the end, I'll post a link to Github repo with example code there. And it uses Material Design and Flexbox layout for the UI, along with React. Preparing Our App to Add Authentication Now we're going to need to go back to our `firebase. I believe I am understanding the nature of syncing and using re-base, procs, and states however in searching around for sample apps, I just can’t seem to find a basic CRUD app. 0 and React Native make a great pair. User Management with Firebase’s Database in React So far, only Firebase knows about your users. Traditionally people used servers for that. From here we will then cover the Firebase realtime database and look at how to set, update and delete data. Firebase Database Node. Firebase Functions requires a paid Blaze plan IF you want to make external HTTP calls. react-redux-firebase provides the firestoreConnect HOC (similar to firebaseConnect) for easy setting/unsetting of listeners. It can be your best bet when it comes to changes like data synchronization and offline data modification. If you'd like access to the full suite of native firebase tools, we recommend using the bare workflow and react-native-firebase, because we cannot support this in the Expo client currently. Integrate Redux and Firebase with React apps using straightforward, practical patterns. Select Start in test mode and then Enable. Firebase as a backend with React is a great choice as it is easy, powerful, and provides great developer experience. Let's start with Auth. But for this tutorial, we'll use react-native-push-notification plugin, which is made only for Push Notification purpose. I’ve been through the React for Beginners course (which I really liked, and learned a lot from) and by way of the course am really interested in Firebase. when you set react-native-firebase, Analytics is automatically configured. It maps collections from the Firebase database (Firestore) to your react-admin application. For the data part, I decided to use Google's Firebase. · Firebase's data stream model may limit the ability to write complex queries · Since it uses NoSQL, the traditional relational data models are not applicable and developers SQL query technical skill will not be useful · There is no on-premise installation. In this video we're going to learn how to simply access a realtime Firebase database from a React application. [frontendmasters. 1) React Native Firebase Starter kit comes with AdMob pre-install. Connecting Firebase to the React Studio project. Before we can start adding data into our Firebase database, we need to connect our inputs to our component's state, so that React can keep track of them. The two screenshots from above illustrate the exact data flow necessary to trigger push notifications in React Native using Firebase. Using the cloud database you can visualize your collected sensor data, and the individual components of the Thunderboard React can be easily integrated and modified in order to add BLE-to-cloud connectivity to other projects. Firebase is a realtime database for the modern web.