Adding GraphQL to Next.js 13.4.12 Project

This document provides a step-by-step guide to add GraphQL to your Next.js version 13.4.12 project. GraphQL is a powerful query language that allows you to fetch data efficiently from your server, and integrating it with Next.js can enhance your application's data-fetching capabilities.

Prerequisites

Before proceeding with the GraphQL integration, ensure that you have the following installed:

Next.js 13.4.12 project: You should have a Next.js project set up and ready to add GraphQL functionality. If you don't have a project yet, create one using the Next.js template.
GraphQL Server: You should have a GraphQL server set up and running. If you don't have a GraphQL server yet, you can use the Apollo Server to create one.

Steps

Install required packages:
```
yarn add graphql @apollo/client
```
The above command will install the graphql package, which is the core GraphQL library, and the @apollo/client package, which helps you create a GraphQL server ideal for Next.js projects.

Create a new file lib/provider.tsx

'use client';

import {
	ApolloClient,
	ApolloProvider,
	InMemoryCache,
} from '@apollo/client';

const client = new ApolloClient({
	uri: 'http://localhost:8000/graphql',
	cache: new InMemoryCache(),
});

interface IGraphQlProviderProps {
	children: React.ReactNode;
}

const GraphQlProvider: React.FC<IGraphQlProviderProps> = ({
	children,
}) => {
	return (
		<ApolloProvider client={client}>
			{children}
		</ApolloProvider>
	);
};

export default GraphQlProvider;

The above code creates a new ApolloClient instance and exports it as a Provider component. The ApolloClient instance is configured with the GraphQL server's URL and an InMemoryCache instance.

In your layout.tsx file, wrap the Component prop with the GraphQlProvider component:

import GraphQLProvider from '../lib/provider';

export default function RootLayout({
	children,
}: {
	children: React.ReactNode;
}) {
	return (
		<html lang="en">
			<body className={inter.className}>
				<GraphQLProvider>{children}</GraphQLProvider>
			</body>
		</html>
	);
}

The above code wraps the Component prop with the GraphQlProvider component, which provides the ApolloClient instance to the entire application.

In your client components use the gql from @apollo/client to create a GraphQL query:

import { gql, useQuery } from '@apollo/client';

const query = gql`
	query GetTodosWithUser {
		getTodos {
			id
			title
			completed
		}
	}
`;

In the same component, use the useQuery hook to fetch data from the GraphQL server:
```
const { loading, error, data } = useQuery(query);
```
The above code uses the useQuery hook to fetch data from the GraphQL server. The useQuery hook accepts a GraphQL query and returns the loading state, error, and data.

In the same component, render the data returned from the GraphQL server:

if (loading) return <p>Loading...</p>;
if (error) return <p>Error :(</p>;

return (
	<ul>
		{data.getTodos.map((todo: any) => (
			<li key={todo.id}>{todo.title}</li>
		))}
	</ul>
);

// This will render a list of todos depending on the data returned from the GraphQL server.

Conclusion

In this guide, you learned how to add GraphQL to your Next.js project. You also learned how to use the useQuery hook to fetch data from the GraphQL server and render it in your application.

Shriansh2002/graphql-next13

Adding GraphQL to Next.js 13.4.12 Project

Prerequisites

Steps

Conclusion