How to use the useMutation hook with GraphQL in Next.js

In Next.js, you can use the useMutation hook from a GraphQL client library, such as Apollo Client or Relay, to perform mutation operations. Below, I'll provide an example using Apollo Client, assuming you have already set up Apollo Client in your Next.js project.

1. Install Apollo Client: If you haven't installed Apollo Client, you can do so by running:

   bashCopy code
   npm install @apollo/client
   

2. Set up Apollo Client in your Next.js app: Create a file named apolloClient.js (or similar) to configure Apollo Client. This file might look something like this:

   javascriptCopy code
   import { ApolloClient, InMemoryCache } from '@apollo/client';
   
   const client = new ApolloClient({
     uri: 'your-graphql-endpoint',
     cache: new InMemoryCache(),
   });
   
   export default client;
   

   Replace 'your-graphql-endpoint' with the actual GraphQL endpoint you are using.

3. Wrap your Next.js app with ApolloProvider: In your pages/_app.js file, wrap your Next.js app with the ApolloProvider:

   javascriptCopy code
   import { ApolloProvider } from '@apollo/client';
   import apolloClient from '../path-to-your-apolloClient-file';
   
   function MyApp({ Component, pageProps }) {
     return (
       <ApolloProvider client={apolloClient}>
         <Component {...pageProps} />
       </ApolloProvider>
     );
   }
   
   export default MyApp;
   

4. Use useMutation hook in your component: Now you can use the useMutation hook in your component to perform mutations. Here's an example:

   javascriptCopy code
   import { useMutation, gql } from '@apollo/client';
   
   const YOUR_MUTATION = gql`
     mutation YourMutation($input: YourInputType) {
       yourMutationName(input: $input) {
         // specify the fields you want in the response
       }
     }
   `;
   
   function YourComponent() {
     const [mutateFunction, { data, loading, error }] = useMutation(YOUR_MUTATION);
   
     const handleMutation = async () => {
       try {
         const { data } = await mutateFunction({
           variables: {
             input: {
               // your mutation input data
             },
           },
         });
   
         // Handle success (data variable contains the response)
       } catch (error) {
         // Handle error
       }
     };
   
     return (
       <div>
         <button onClick={handleMutation}>Perform Mutation</button>
       </div>
     );
   }
   
   export default YourComponent;
   

   Replace YourMutation, YourInputType, yourMutationName, and other placeholders with your actual mutation details.

Remember to tailor the code to match your GraphQL schema, mutation, and application structure. Also, consult the documentation of the GraphQL client library you are using for more specific details.