Creating a React Native app using Apollo Graphql v3 (2023)

Introduction

In this tutorial we will build a react-native shopping cart app using the version 3 of Apollo Graphql. This tutorial is based on these great three part series of articles focusing on Apollo v3 and a basic structure of projects using this technology stack.

Note: this tutorial assumes that you have a working knowledge of React-native, typescript and node.

The final source code of this tutorial can be obtained by acessing https://github.com/HarrisonHenri/rick-morty-react-native-shop.

Beginning

Firstly, we create a brand new react-native app using react-native cli:

npx react-native init rickmortyshop --template react-native-template-typescript

and then, we remove the App.tsx file, add a new index.tsx file at src and modify the content of index.js to:

/** * @format */import { AppRegistry } from 'react-native';import App from './src/index';import { name as appName } from './app.json';AppRegistry.registerComponent(appName, () => App);

Apollo graphql installation and setup

Now we will Add the necessary packages from apollo:

yarn add graphql @apollo/client graphql-tag

The setup is very simillar to presented at https://dev.to/komyg/creating-an-app-using-react-and-apollo-graphql-1ine, so I'll describe this part very succinctly:

Apollo client

To create our connection between the client app and the Graphql server at src/common/config/apollo/http-link.ts we write:

import { HttpLink } from '@apollo/client/link/http';export function createHttpLink() { return new HttpLink({ uri: 'https://rickandmortyapi.com/graphql', });}

Error link

Now, to to handle errors at our requests at src/common/config/apollo/error-link.ts we write:

import { onError } from '@apollo/client/link/error';export const errorLink = onError(({ graphQLErrors, networkError, response, operation }) => { if (graphQLErrors) { for (const error of graphQLErrors) { console.error( `[GraphQL error]: Message: ${error.message}, Location: ${error.locations}, Path: ${error.path}`, operation, response ); } } if (networkError) { console.error(`[Network error]: ${networkError}`, operation, response); }});

Apollo local cache

Here, different from https://dev.to/komyg/creating-an-app-using-react-and-apollo-graphql-1ine, we just write (at src/common/config/apollo/local-cache.ts):

import {InMemoryCache} from '@apollo/client';export const localCache = new InMemoryCache();

That's why, we don't need to freezeResults anymore because now this is the default behavior.

Wrappping all

At src/common/apollo-client.ts we write:

import { ApolloClient, ApolloLink } from '@apollo/client';import { errorLink } from './apollo/error-link';import { createHttpLink } from './apollo/http-link';import { localCache } from './apollo/local-cache';export function createApolloClient() { const httpLink = createHttpLink(); const apolloClient = new ApolloClient({ link: ApolloLink.from([errorLink, httpLink]), connectToDevTools: process.env.NODE_ENV !== 'production', cache: localCache, assumeImmutableResults: true, }); return apolloClient;}

Here we are putting everything together and creating our ApolloClient object. Now at src/index.tsx we write:

import React from 'react';import { ApolloProvider } from '@apollo/client';import { Text, View } from 'react-native';import { createApolloClient } from './common/config/apollo-client';const apolloClient = createApolloClient();const App = () => { return ( <ApolloProvider client={apolloClient}> <View> <Text>Hello</Text> </View> </ApolloProvider> );};export default App;

in order to make the ApolloProvider available globally.

Graphql codegen

Now we will install and setup the graphql codegen,a tool that automatically generates typescript types based on the server schema. After installing, execute the cli using:

yarn graphql-codegen init

then, follow the steps bellow:

  1. Application built with React.
  2. Type the Rick and Morty Graphql api url: https://rickandmortyapi.com/graphql.
  3. Use the default value (src/**/*.graphql) for the fragment and operations.
  4. Then pick the following plugins: TypeScript, TypeScript Operators, TypeScript React Apollo and Introspection Fragment Matcher.
  5. Type the following value: src/common/generated/graphql.tsx.
  6. Answer no when it asks if you want to generate an introspection file.
  7. Use the default value for the name of the config file.
  8. Type in gen-graphql when it asks the name of the script in the package.json that will be used to generate the graphql files.

and the yarn install to install all necessary plugins.

Creating the home screen

First, we will create our first query to retrieve all characters from Rick and Morty cartoon. To achieve this, at src/common/graphql/queries/get-characters.query.graphql we paste:

query GetCharacters { characters { __typename results { id __typename name image species origin { id __typename name } location { id __typename name } } }}

Then we run:

yarn gen-graphql

and if the command runs successfully, you should see that a graphql.tsx file was created. Now, at src/common/components/CharacterCard.tsx we paste the code bellow:

import React from 'react';import { Image, StyleSheet, Text, View } from 'react-native';interface Props { data: { image?: string | null; name?: string | null; };}const CharacterCard: React.FC<Props> = ({ data }) => { return ( <View style={styles.container}> {data.image && ( <Image source={{ uri: data.image }} style={styles.image} /> )} <View style={styles.details}> <Text style={styles.text}>{data.name}</Text> </View> </View> );};export default CharacterCard;const styles = StyleSheet.create({ container: { width: '100%', borderRadius: 20, marginVertical: 8, paddingHorizontal: 8, paddingVertical: 24, backgroundColor: '#F0F0F0', flexDirection: 'row', }, image: { width: 70, height: 70 }, details: { marginLeft: 8, justifyContent: 'space-between', flex: 1, }, text: { fontSize: 16, fontWeight: 'bold', },});

Now, at scr/screens/Home.tsx we write:

import React from 'react';import { ActivityIndicator, FlatList, StyleSheet, View } from 'react-native';import { Character, useGetCharactersQuery } from '../common/generated/graphql';import CharacterCard from '../common/components/CharacterCard';const Home = () => { const { data, loading } = useGetCharactersQuery(); if (loading) { return ( <View style={styles.container}> <ActivityIndicator color="#32B768" size="large" /> </View> ); } return ( <View style={styles.container}> <FlatList data={data?.characters?.results} renderItem={({ item }) => <CharacterCard data={item as Character} />} contentContainerStyle={styles.characterList} /> </View> );};export default Home;const styles = StyleSheet.create({ container: { flex: 1, backgroundColor: '#FFFFFF', }, characterList: { padding: 16, },});

Here we are using the useGetCharactersQuery hook provided by the graphql codegen. The hook provided useful fetch tools like the server response (data) and the loading state. Then, finally at src/index.tsx we write:

import React from 'react';import { ApolloProvider } from '@apollo/client';import { createApolloClient } from './common/config/apollo-client';import Home from './screens/Home';const apolloClient = createApolloClient();const App = () => { return ( <ApolloProvider client={apolloClient}> <Home /> </ApolloProvider> );};export default App;

If everything goes well, when you run yarn start you will se your app cards with all Ricky Morty characters presented!

Creating the shopping cart logic

Updating queries

Now that we are retrieving the data from the remote server we can start to create the shopping cart logic. First we will write our local-shema at src/common/config/local-schema.graphql:

type Query { shoppingCart: ShoppingCart!}extend type Character { chosenQuantity: Int! unitPrice: Int!}type ShoppingCart { id: ID! totalPrice: Int! numActionFigures: Int!}

And then, at src/common/graphql/fragments/character.fragment.graphql we write:

fragment characterData on Character { id __typename name unitPrice @client chosenQuantity @client}

Here we create this fragment to insert @client fields (fields that only exists at our local cache state) and also to use this fragment at our character query. So, in order to do this, we update the src/common/graphql/queries/get-characters.query.graphql pasting the code bellow:

query GetCharacters { characters { __typename results { ...characterData image species origin { id __typename name } location { id __typename name } } }}

Finally, we paste the code bellow at src/common/graphql/queries/shopping-cart.query.graphql to create our shopping cart query:

query GetShoppingCart { shoppingCart @client { id totalPrice numActionFigures }}

Updating local cache initialization

Now that we have our local queries, we will update our local cache at src/common/config/apollo/local-cache.ts:

import { gql, InMemoryCache } from '@apollo/client';export const localCache = new InMemoryCache();export const LocalCacheInitQuery = gql` query LocalCacheInit { shoppingCart }`;export function initialLocalCache() { localCache.writeQuery({ query: LocalCacheInitQuery, data: { shoppingCart: null, }, });}

Here we are initializating our shopping cart with a null value. After that, at src/common/config/apollo-client.ts we paste the code bellow to initializate our local cache:

import { ApolloClient, ApolloLink } from '@apollo/client';import { errorLink } from './apollo/error-link';import { createHttpLink } from './apollo/http-link';import { initialLocalCache, localCache } from './apollo/local-cache';export function createApolloClient() { const httpLink = createHttpLink(); const apolloClient = new ApolloClient({ link: ApolloLink.from([errorLink, httpLink]), connectToDevTools: process.env.NODE_ENV !== 'production', cache: localCache, assumeImmutableResults: true, }); return apolloClient;}initialLocalCache();

Creating our fieldPolicies

Now, instead of using resolvers (they are being deprecated in Apollo v3) we will use the fieldPolicies to initialize the local fields. Back to src/common/config/apollo/local-cache.ts we paste:

import { gql, InMemoryCache } from '@apollo/client';export const localCache = new InMemoryCache({ typePolicies: { Character: { fields: { chosenQuantity: { read(chosenQuantity) { if (chosenQuantity === undefined || chosenQuantity === null) { return 0; } return chosenQuantity; }, }, unitPrice: { read(_, { readField }) { const charName = readField('name'); switch (charName) { case 'Albert Einstein': return 25; case 'Rick Sanchez': case 'Morty Smith': return 10; default: return 5; } }, }, }, }, },});export const LocalCacheInitQuery = gql` query LocalCacheInit { shoppingCart }`;export function initialLocalCache() { localCache.writeQuery({ query: LocalCacheInitQuery, data: { shoppingCart: null, }, });}

Let's dive in what are we doing here, piece by piece:

  • We modify our InMemoryCache object, adding field policies to the Character type.
  • At the chosenQuantity's field policy we add a read function based on the existing value of chosenQuantity field. If this field is not falsy we return its value, if not, return 0. Since this is a local field, the value obtained from the server is initially falsy.
  • At the unitPrice's field policy we add another read function based on the value of name field. To achieve this we use the readField function helper, passing the name of the field that we are interested. In this particular case, we are looking for change the character's unitPrice based on its own name.

Now, at codegen.yml we paste:

overwrite: trueschema: "https://rickandmortyapi.com/graphql"documents: "src/**/*.graphql"generates: src/common/generated/graphql.tsx: schema: "./src/common/config/local-schema.graphql" plugins: - "typescript" - "typescript-operations" - "typescript-react-apollo" - "fragment-matcher" src/common/generated/fragment-matcher.json: schema: "./src/common/config/local-schema.graphql" plugins: - "fragment-matcher"

And finallly we can generate the typing again running:

yarn gen-graphql

Updating the character card

After that, we install some dependencies that will be used now, and later on:

yarn add react-native-vector-icons @types/react-native-vector-icons @react-navigation/native react-native-gesture-handler react-native-reanimated react-native-screens react-native-safe-area-context @react-native-community/masked-view

and update the src/common/components/CharacterCard.tsx:

import React from 'react';import { Image, StyleSheet, Text, View } from 'react-native';import { RectButton } from 'react-native-gesture-handler';import Icon from 'react-native-vector-icons/Entypo';interface Props { data: { image?: string | null; name?: string | null; unitPrice?: number; chosenQuantity?: number; };}const CharacterCard: React.FC<Props> = ({ data }) => { return ( <View style={styles.container}> {data.image && ( <Image source={{ uri: data.image }} style={styles.image} /> )} <View style={styles.details}> <Text style={styles.text}>{data.name}</Text> <Text style={styles.text}>{`U$ ${data.unitPrice}`}</Text> </View> <View style={styles.choseQuantityContainer}> <RectButton> <Icon name="minus" size={24} color="#3D7199" /> </RectButton> <Text style={styles.choseQuantityText}>{data.chosenQuantity}</Text> <RectButton> <Icon name="plus" size={24} color="#3D7199" /> </RectButton> </View> </View> );};export default CharacterCard;const styles = StyleSheet.create({ container: { width: '100%', borderRadius: 20, marginVertical: 8, paddingHorizontal: 8, paddingVertical: 24, backgroundColor: '#F0F0F0', flexDirection: 'row', }, image: { width: 70, height: 70 }, details: { marginLeft: 8, justifyContent: 'space-between', flex: 1, }, text: { fontSize: 16, fontWeight: 'bold', }, choseQuantityContainer: { flex: 1, alignItems: 'center', justifyContent: 'space-between', flexDirection: 'row', }, choseQuantityText: { padding: 8, borderRadius: 8, backgroundColor: '#fff', fontSize: 16, fontWeight: 'bold', },});

At this update we are presenting the new local fields unitPrice, chosenQuantity and the RectButton to increase and decrease the quantities. Now we will build this logic to update the chosenQuantity at src/common/hooks/use-update-chosen-quantity.ts:

import { useApolloClient } from '@apollo/client';import { useCallback } from 'react';import { CharacterDataFragment, CharacterDataFragmentDoc, GetShoppingCartDocument, GetShoppingCartQuery,} from '../generated/graphql';interface UpdateChosenQuantity { (): { onIncreaseChosenQuantity: (id: string) => void; onDecreaseChosenQuantity: (id: string) => void; };}export const useUpdateChosenQuantity: UpdateChosenQuantity = () => { const client = useApolloClient(); const getCharacter = useCallback( (id: string) => client.readFragment<CharacterDataFragment>({ fragment: CharacterDataFragmentDoc, id: `Character:${id}`, }), [client], ); const getShoppingCartParams = useCallback(() => { const shoppingCart = client.readQuery<GetShoppingCartQuery>({ query: GetShoppingCartDocument, })?.shoppingCart; if (!shoppingCart) { return { id: 'ShoppingCart:1', totalPrice: 0, numActionFigures: 0, }; } return { ...shoppingCart, }; }, [client]); const increaseShoppingCart = useCallback( (unitPrice: number) => { let { id, totalPrice, numActionFigures } = getShoppingCartParams(); totalPrice = totalPrice + unitPrice; numActionFigures = numActionFigures + 1; client.writeQuery<GetShoppingCartQuery>({ query: GetShoppingCartDocument, data: { shoppingCart: { id, numActionFigures, totalPrice, }, }, }); }, [client, getShoppingCartParams], ); const decreaseShoppingCart = useCallback( (unitPrice: number) => { let { id, totalPrice, numActionFigures } = getShoppingCartParams(); totalPrice = totalPrice - unitPrice; numActionFigures = numActionFigures - 1; if (totalPrice < 0) { totalPrice = 0; } if (numActionFigures < 0) { numActionFigures = 0; } client.writeQuery<GetShoppingCartQuery>({ query: GetShoppingCartDocument, data: { shoppingCart: { id, numActionFigures, totalPrice, }, }, }); }, [client, getShoppingCartParams], ); const onIncreaseChosenQuantity = useCallback( (id: string) => { const character = getCharacter(id); client.writeFragment<CharacterDataFragment>({ fragment: CharacterDataFragmentDoc, id: `Character:${id}`, data: { ...(character as CharacterDataFragment), chosenQuantity: (character?.chosenQuantity ?? 0) + 1, }, }); increaseShoppingCart(character?.unitPrice as number); }, [client, getCharacter, increaseShoppingCart], ); const onDecreaseChosenQuantity = useCallback( (id: string) => { const character = getCharacter(id); let chosenQuantity = (character?.chosenQuantity ?? 0) - 1; if (chosenQuantity < 0) { chosenQuantity = 0; } client.writeFragment<CharacterDataFragment>({ fragment: CharacterDataFragmentDoc, id: `Character:${id}`, data: { ...(character as CharacterDataFragment), chosenQuantity, }, }); decreaseShoppingCart(character?.unitPrice as number); }, [client, getCharacter, decreaseShoppingCart], ); return { onIncreaseChosenQuantity, onDecreaseChosenQuantity, };};

Let's carve up what we are doing here:

  • Firs't we import our types from the generated file.
  • Then we create an interface to type our local api.
  • Then we get the useApolloClient() hook.
  • After that we create a helper getCharacter to read our character fragment, passing the fragment doc and the id of the fragment (usually the apollo saves the fragments in a normalized way, using the typename:id as a unique key).
  • After this we create the getShoppingCartParams to retrive the shoppingCart data from the cache. If the shoppingCart is null we return some default values.
  • On increaseShoppingCart we retrieve the data from getShoppingCartParams and add the unitPrice from the character being edited. The same happens to decreaseShoppingCart.
  • On onIncreaseChosenQuantity we getCharacter, update his chosenQuantity properly and passes its unitPrice to the increaseShoppingCart. The similar ocurs with the onDecreaseChosenQuantity.
  • Finally we expose this api.

Finishing the app

Updating the character card

At src/common/components/character-cart.tsx we write:

import React from 'react';import { Image, StyleSheet, Text, View } from 'react-native';import { RectButton } from 'react-native-gesture-handler';import Icon from 'react-native-vector-icons/Entypo';import { useUpdateChosenQuantity } from '../hooks/use-update-chosen-quantity';interface Props { data: { id?: string | null; image?: string | null; name?: string | null; unitPrice?: number; chosenQuantity?: number; };}const CharacterCard: React.FC<Props> = ({ data }) => { const { onIncreaseChosenQuantity, onDecreaseChosenQuantity } = useUpdateChosenQuantity(); return ( <View style={styles.container}> {data.image && ( <Image source={{ uri: data.image }} style={styles.image} /> )} <View style={styles.details}> <Text style={styles.text}>{data.name}</Text> <Text style={styles.text}>{`U$ ${data.unitPrice}`}</Text> </View> <View style={styles.choseQuantityContainer}> <RectButton onPress={onDecreaseChosenQuantity.bind(null, data.id as string)}> <Icon name="minus" size={24} color="#3D7199" /> </RectButton> <Text style={styles.choseQuantityText}>{data.chosenQuantity}</Text> <RectButton onPress={onIncreaseChosenQuantity.bind(null, data.id as string)}> <Icon name="plus" size={24} color="#3D7199" /> </RectButton> </View> </View> );};export default CharacterCard;const styles = StyleSheet.create({ container: { width: '100%', borderRadius: 20, marginVertical: 8, paddingHorizontal: 8, paddingVertical: 24, backgroundColor: '#F0F0F0', flexDirection: 'row', }, image: { width: 70, height: 70 }, details: { marginLeft: 8, justifyContent: 'space-between', flex: 1, }, text: { fontSize: 16, fontWeight: 'bold', }, choseQuantityContainer: { flex: 1, alignItems: 'center', justifyContent: 'space-between', flexDirection: 'row', }, choseQuantityText: { padding: 8, borderRadius: 8, backgroundColor: '#fff', fontSize: 16, fontWeight: 'bold', },});

Here we are just adding the onPress event listener using our local api useUpdateChosenQuantity.

Creating the cart screen

Now that we have our shopping cart logic, we can build our cart screen (src/screens/Cart.tsx):

import React, { useCallback } from 'react';import { useNavigation } from '@react-navigation/native';import { StyleSheet, Text, View, SafeAreaView, Button } from 'react-native';import { useGetShoppingCartQuery } from '../common/generated/graphql';const Cart = () => { const navigation = useNavigation(); const { data } = useGetShoppingCartQuery(); const handleNavigation = useCallback(() => { navigation.navigate('Home'); }, [navigation]); return ( <SafeAreaView style={styles.container}> {data?.shoppingCart?.numActionFigures ? ( <> <View style={styles.content}> <Text style={styles.emoji}>🤗</Text> <Text style={ styles.subtitle }>{`Total number of items: ${data?.shoppingCart.numActionFigures}`}</Text> <Text style={ styles.subtitle }>{`Total price: U$ ${data?.shoppingCart.totalPrice}`}</Text> </View> </> ) : ( <> <View style={styles.content}> <Text style={styles.emoji}>😢</Text> <Text style={styles.title}>Empty cart!</Text> <View style={styles.footer}> <Button title="Go back to shop" onPress={handleNavigation} /> </View> </View> </> )} </SafeAreaView> );};export default Cart;const styles = StyleSheet.create({ container: { flex: 1, alignItems: 'center', justifyContent: 'center', }, content: { flex: 1, alignItems: 'center', justifyContent: 'center', width: '100%', }, title: { fontSize: 24, marginTop: 15, lineHeight: 32, textAlign: 'center', }, subtitle: { fontSize: 16, lineHeight: 32, marginTop: 8, textAlign: 'center', paddingHorizontal: 20, }, emoji: { fontSize: 44, textAlign: 'center', }, footer: { width: '100%', paddingHorizontal: 20, },});

Here we are just adding our Cart view, using the shoppingCart query to printing the info. Finally we install the react-native bottom tabs:

yarn add @react-navigation/bottom-tabs

At src/routes.tsx we write:

import React from 'react';import { StyleSheet, Text, View } from 'react-native';import { createBottomTabNavigator } from '@react-navigation/bottom-tabs';import { useGetShoppingCartQuery } from './common/generated/graphql';import MaterialIcons from 'react-native-vector-icons/MaterialIcons';import Home from './screens/Home';import Cart from './screens/Cart';const TabRoutes = createBottomTabNavigator();const Routes: React.FC = () => { const { data } = useGetShoppingCartQuery(); return ( <TabRoutes.Navigator tabBarOptions={{ labelPosition: 'beside-icon', style: { height: 64, alignItems: 'center', }, }}> <TabRoutes.Screen name="Home" component={Home} options={{ tabBarIcon: ({ size, color }) => ( <MaterialIcons size={size * 1.2} color={color} name="home" /> ), }} /> <TabRoutes.Screen name="Cart" component={Cart} options={{ tabBarIcon: ({ size, color }) => data?.shoppingCart?.numActionFigures ? ( <View style={styles.badgeIconView}> <Text style={styles.badge}> {data?.shoppingCart?.numActionFigures} </Text> <MaterialIcons size={size * 1.2} color={color} name="shopping-cart" /> </View> ) : ( <MaterialIcons size={size * 1.2} color={color} name="shopping-cart" /> ), }} /> </TabRoutes.Navigator> );};export default Routes;const styles = StyleSheet.create({ badgeIconView: { position: 'relative', }, badge: { position: 'absolute', zIndex: 10, left: 24, bottom: 20, padding: 1, borderRadius: 20, fontSize: 14, },});

Then at src/index.tsx we finally update:

import React from 'react';import { ApolloProvider } from '@apollo/client';import { NavigationContainer } from '@react-navigation/native';import { createApolloClient } from './common/config/apollo-client';import Routes from './routes';const apolloClient = createApolloClient();const App = () => { return ( <ApolloProvider client={apolloClient}> <NavigationContainer> <Routes /> </NavigationContainer> </ApolloProvider> );};export default App;

Conclusion

If all goes well, when you run our app you should be able to increase and decrease the desired quantity of action figures and see the cart screen with the total price and the total number of action figures in the shopping cart. Finally, I'll be happy if you could provide me any feedback about the code, structure, doubt or anything that could make me a better developer!

FAQs

Can you use Apollo Client for React Native? ›

You can use Apollo with React Native exactly as you would with React Web. If you are new to using Apollo with React, you should probably read the React guide.

Find Out More ›
Can I use GraphQL with React Native? ›

You will need to have Node 11.2+, Yarn 1.13+, React Native CLI 2.0+ and React Native 0.59+ installed on your machine. GraphQL's adoption is increasing, and for good reason.

Know More ›
Which GraphQL Client is best for React Native? ›

Apollo Client is a popular GraphQL client that works well with React, React Native, Angular 2, or plain JavaScript. Apollo Client is a powerful choice that is a good candidate for enterprise projects because of the robust nature of tooling available for Typescript, Chrome/Firefox Developer tools, and VS Code.

See More ›
How do I set up GraphQL in React Native? ›

How do you work with GraphQL in React Native? Here's a step-by-step tutorial to get you started!
  1. Prerequisites.
  2. Step 1: Create React Native project.
  3. Step 2: Install dependencies.
  4. Step 3: Integrating Apollo Client.
  5. Step 4: HomeScreen.js.
  6. Step 5: Add Query.
  7. Conclusion. References.
Jul 22, 2022

Show Me More ›
Can Apollo client replace redux? ›

Apollo GraphQL no longer requires Redux. Apollo Client automatically catches the data and normalizes new data in query responses and after mutation.

Learn More ›
When GraphQL should not be used? ›

GraphQL makes some tasks more complex

For example, in an application that uses a few fields the same way each time, using GraphQL adds more complexity because of things like types, queries, mutators, resolvers, and higher-order components, From a maintenance perspective, this is especially detrimental.

Find Out More ›
Why we use GraphQL in React Native? ›

GraphQL is a query language for querying exactly what you want from many resources in a single request. It is intended for clients such as web apps to be more performant and to make it easier to work with backend data. This guide will demonstrate how to integrate GraphQL into your React app using Apollo Client.

Get More Info ›
How do you fetch data from GraphQL in React Native? ›

4 Ways to Fetch Data from a GraphQL API in React
  1. HTTP METHOD: We need to specify the HTTP Method (GET, POST, PUT etc). ...
  2. URL: The URL for the endpoint of the GraphQL API.
  3. Header: We have to set the header to content-type of application/json for all GraphQL APIs.
Nov 12, 2021

Discover More ›
Which backend is best for React Native? ›

Best 10 Backend for React. js
  • Firebase. ...
  • Prisma. ...
  • Heroku. ...
  • Strapi. ...
  • Gatsby. ...
  • Django. ...
  • Digital Ocean. ...
  • Ruby. Ruby on Rails, or Rails, is a server-side web application framework written in Ruby under the MIT License.
Jan 30, 2023

Discover More ›
Is URQL better than Apollo? ›

For example, both Apollo and Relay support normalized caching, while URQL supports document and normalized caching. The most fundamental difference between the three clients is in their core philosophy. Apollo is flexible and easygoing, Relay is opinionated and structured, and URQL is lightweight and extensible.

Learn More Now ›

Which is faster GraphQL or REST API? ›

GraphQL performance is fast and Rest are multiple network calls take up more time. GraphQL development speed is rapid and Rest are slower.

Discover More ›
What is the difference between Apollo and GraphQL? ›

The Apollo platform is an implementation of GraphQL that can transfer data between the cloud (server) to the UI of your app . In fact, Apollo builds its environment in such a way that we can use it to handle GraphQL on the client as well as the server side of the application.

Read More ›
How do you call a GraphQL API in React Native? ›

  1. Start the react native application. npm start.
  2. Import @apollo/client package in src/Main. js file. ...
  3. Configure Apollo Client in src/Main.js file. ...
  4. Wrap your application in the ApolloProvider component. ...
  5. Full code of src/Main.js file. ...
  6. Run the application. ...
  7. Import @apollo/client package. ...
  8. Write GraphQL query src/screens/feed.js.
Mar 21, 2021

Continue Reading ›
How do you use Apollo with GraphQL? ›

Get started with Apollo Server
  1. Step 1: Create a new project.
  2. Step 2: Install dependencies.
  3. Step 3: Define your GraphQL schema.
  4. Step 4: Define your data set.
  5. Step 5: Define a resolver.
  6. Step 6: Create an instance of ApolloServer.
  7. Step 7: Start the server.
  8. Step 8: Execute your first query.

View More ›
How do you use GraphQL in react app? ›

Contents
  1. Set Up GraphQL Server as a Service.
  2. Set Up Authentication for Your React Application.
  3. Scaffold Your React Application.
  4. Build Your GraphQL React Application. App With Router Access and App.js. Add a Header Component. Create a Home Page. ...
  5. Test Your GraphQL React Application.
  6. Learn More About GraphQL and React.
Nov 23, 2020

Learn More ›
How do I start building React Native app? ›

React Native apps
  1. Setting up a React Native project. ...
  2. Using Expo without ejecting. ...
  3. Adding the app to Codemagic. ...
  4. Creating codemagic. ...
  5. Code signing. ...
  6. Setting up the Android package name and iOS bundle identifier. ...
  7. Configure scripts to build the app. ...
  8. Build versioning.
Nov 25, 2022

View More ›
How do I connect GraphQL TO REST API? ›

How to Convert a REST API to GraphQL
  1. Step 1: Read Through the REST API Docs and Identify Endpoints to Convert. ...
  2. Step 2: Understand the REST Endpoint's Schema. ...
  3. Step 3: Create a Corresponding GraphQL Schema. ...
  4. Step 4: Define a GraphQL Query. ...
  5. Step 5: Define the API Metadata.

Discover More Details ›
Why people still use Redux? ›

Redux is most useful in cases when:

You have large amounts of application state that are needed in many places in the app. The app state is updated frequently. The logic to update that state may be complex. The app has a medium or large-sized codebase, and might be worked on by many people.

Discover More ›
Is Redux obsolete? ›

With all that said, Redux is still a great product. It's well documented, adopted by many, and can be combined with the approaches posted above. But what use cases warrants the added complexity and learning curve of adding Redux to your stack in 2021?

Keep Reading ›
Should I use Redux anymore? ›

The short answer is no, Redux is not necessary for React applications. However, there are always clear warning signs when you should be using a state management library like Redux and signs that you shouldn't.

Continue Reading ›

What is the biggest disadvantage from using GraphQL? ›

Disadvantages of GraphQL
  1. GraphQL Query Complexity. Don't mistake GraphQL as a replacement for server-side databases. ...
  2. GraphQL Caching. It is more complicated to implement a simplified cache with GraphQL than implementing it in REST. ...
  3. GraphQL Rate Limiting. Another problem with GraphQL is rate-limiting.

Tell Me More ›
Is GraphQL declining? ›

Overall, GraphQL is trending upwards. However, from early 2020 on, there's a clear dent which doesn't seem like we're able to recover from it. It could be the case that we'll never reach the highs of 2019-2020 again.

Find Out More ›
Why GraphQL is overkill? ›

GraphQL can be overkill

Since GraphQL is so complex and powerful, it can commonly be overkill for smaller applications. If you have a simple/straight-forward app in front of you, it will be easier to work with a REST API.

Read More ›
When should I use GraphQL instead of REST? ›

If you are aiming to develop an API to be used on a mobile application you should have GraphQL as first option because bandwidth usage matters. If your application requires a robust API, with caching and a monitoring system you should go with REST.

Know More ›
Why React Native is better than flutter? ›

Performance. React Native - React leverages JavaScript to connect to native components via a bridge. As a result, the speed of development and running time is slower than Flutter. Flutter - There is no interconnecting bridge for initiating interactions with the device's native components.

Know More ›
Why do we need Apollo for GraphQL? ›

Why choose Apollo Client to manage your data? Apollo Client is a state management library that simplifies managing remote and local data with GraphQL. Apollo Client's intelligent caching and declarative approach to data fetching can help you iterate faster while writing less code.

Tell Me More ›
How do you display data from GraphQL in React? ›

In this article, we will take a look at how to use this library to query a GraphQL API and display its data in a React app.
...
Fetching Data from GraphQL APIs with Apollo React
  1. Step 1: Getting Started. ...
  2. Step 2: Initialize ApolloClient. ...
  3. Step 3: Write the Query. ...
  4. Step 4: Run the Query. ...
  5. Step 5: Display Data in React.
Nov 8, 2021

Continue Reading ›
Can GraphQL get data from REST API? ›

GraphQL can retrieve data on top of or instead of the API management layer, but data can still be submitted through the existing REST APIs.

Read More ›
How do I show API data in React Native? ›

To show data procurement in React Native, we'll construct a basic app that fetches a list of items from Coffee API.
...
When do you need to fetch data?
  1. Loading data on the component's first render.
  2. Fetching the data and rendering it when the user clicks a button.
  3. Loading data at separate time intervals.
Jul 5, 2021

Find Out More ›
What is React Native not good for? ›

The number one drawback to React Native is performance. It is better than other hybrid tools and web apps, but there's no getting around the large overhead framework that slows down performance when measured against native apps.

Tell Me More ›

Which DB is best for React Native? ›

There are varied React Native databases for mobile applications, of which we have listed the best ones, their features, their benefits, and their clients.
  • Realm.
  • SQLite.
  • Firebase.
  • PouchDB.
  • WatermelonDB.
  • Vasern.
  • AWS DynamoDB Database.
Sep 13, 2022

Get More Info ›
Which UI is best for React Native? ›

The best React Native component libraries
  • NativeBase.
  • React Native UI Kitten.
  • RNUI: React Native UI Library.
  • Teaset.
  • Shoutem UI.
  • Lottie for React Native.
  • React Native Maps.
  • React Native Gifted Chat.
Dec 15, 2022

Learn More Now ›
Does Urql work with react native? ›

For React Native, we can use the async storage package @urql/storage-rn . Before installing the library, ensure you have installed the necessary peer dependencies: NetInfo (RN | Expo) and. AsyncStorage (RN | Expo).

Learn More Now ›
What software does Apollo use? ›

GraphOS. GraphOS is Apollo's end-to-end cloud platform for building, observing, and evolving your graph.

Know More ›
What good is Apollo? ›

Apollo is the god who affords help and wards off evil; various epithets call him the "averter of evil". Medicine and healing are associated with Apollo, whether through the god himself or mediated through his son Asclepius.

Find Out More ›
Does Facebook use GraphQL? ›

Facebook experiences these problems with REST and hence built the GraphQL. GraphQL is a declarative way of specifying the data requirements on the client-side. It can be operated on a single end-point. It is more structured than REST.

See More ›
Are there any disadvantages to GraphQL? ›

While GraphQL has many advantages over traditional REST APIs, there are several key disadvantages as well. One disadvantage is that queries always return a HTTP status code of 200 , regardless of whether or not that query was successful.

Discover More ›
Which language is best for GraphQL? ›

Which language should I use for my GraphQL server? There are GraphQL server tools available for most popular languages, but we recommend using Apollo Server (Node. js) because of the ecosystem of tools developed for GraphQL in JavaScript.

Discover More Details ›
What is Apollo Client in React Native? ›

Apollo is a GraphQL client that helps you consume GraphQL APIs. This step-by-step guide explains how to use the Apollo client and Contentstack GraphQL queries to power the content of your React Native SDK apps.

See More ›
What IDE should I use for React Native? ›

To use the React Native CLI, we need to work with emulators. The emulators require heavy or memory-intensive IDEs like Xcode and Android Studio. Now, if you're developing for only Android, you can run the emulator in Android Studio, which is available in both Windows and Mac.

Keep Reading ›

Does Apollo Client need react? ›

While you don't need React or another front-end framework just to fetch data with Apollo Client, our view layer integrations make it easier to bind your queries to your UI and reactively update your components with data.

Learn More Now ›
Which Jetbrains IDE for React Native? ›

IntelliJ IDEA helps you create, edit, lint, run, debug, and maintain your React Native applications.

Get More Info Here ›
Should I use Apollo for GraphQL? ›

Apollo provides a whole lot of open-source libraries that are extremely helpful in implementing GraphQL for JavaScript applications. The Apollo Link library provides us with an API that can “link” different features into the GraphQL control flow.

Read More ›
Is Apollo a server or Client? ›

Apollo Server is an open-source, spec-compliant GraphQL server that's compatible with any GraphQL client, including Apollo Client. It's the best way to build a production-ready, self-documenting GraphQL API that can use data from any source.

Read The Full Story ›
Is there anything better than React Native? ›

Xamarin. Xamarin is always in the conversation of React Native alternatives due to the features it offers to developers. It is an open-source development framework for creating modern iOS, Android, and Windows applications.

Learn More ›
Why use Apollo instead of fetch? ›

Apollo Client's intelligent caching and declarative approach to data fetching can help you iterate faster while writing less code. Additionally, if you need custom functionality, you can create your dream client by building extensions on top of Apollo Client.

Show Me More ›
What is the difference between GraphQL and Apollo GraphQL? ›

GraphQL is a data query language and runtime designed and used at Facebook to request and deliver data to mobile and web apps since 2012. Apollo belongs to "Platform as a Service" category of the tech stack, while GraphQL can be primarily classified under "Query Languages".

Read On ›
Which CLI is best for React Native? ›

Ignite CLI

It is a command-line interface that is provided by Infinite Red for React Native. Ignite CLI tool provides a good head start for application development with its features like boilerplates. Apart from this, it has some other functionalities like the following.

Read The Full Story ›
What is React Native coded in? ›

React Native uses JavaScript to compile the app's user interface, but using native-OS views. For more complex features, it allows code implementation in OS-native languages (Swift and Objective-C for iOS, and Java and Kotlin for Android).

Read On ›
Is React Native best for app development? ›

As an established “hybrid” framework for mobile app development, React Native is proven efficient at cross-platform duties, attractive, popular among devs, and saves time and money. Perhaps the only other multi-platform app development framework to give React Native a good run for its money is Google's Flutter.

Learn More Now ›

References

Top Articles
Latest Posts
Article information

Author: Patricia Veum II

Last Updated: 26/11/2023

Views: 5662

Rating: 4.3 / 5 (64 voted)

Reviews: 95% of readers found this page helpful

Author information

Name: Patricia Veum II

Birthday: 1994-12-16

Address: 2064 Little Summit, Goldieton, MS 97651-0862

Phone: +6873952696715

Job: Principal Officer

Hobby: Rafting, Cabaret, Candle making, Jigsaw puzzles, Inline skating, Magic, Graffiti

Introduction: My name is Patricia Veum II, I am a vast, combative, smiling, famous, inexpensive, zealous, sparkling person who loves writing and wants to share my knowledge and understanding with you.