This plugin sets up your Gatsby project to use Apollo Client. It wraps your app in an ApolloProvider so that you can use GraphQL queries and mutations in your components.
import {useQuery} from '@apollo/client';
function Cupcake() {
const {data, loading, error} = useQuery(GET_CUPCAKE); // <-- just works
}To learn all about GraphQL and Apollo, check out the Lift-off course on Odyssey, Apollo's learning platform.
To use this plugin, you'll also need to install your own copy of @apollo/client. This package exports all of the tools you'll need to make GraphQL queries in your app.
npm install gatsby-plugin-apollo @apollo/client graphqlOnce installed, add the plugin to your Gatsby config.
// gatsby-config.js
module.exports = {
plugins: ['gatsby-plugin-apollo']
};This plugin supports two methods of configuration:
For simple configurations, you can supply many of the ApolloClient constructor options directly to the plugin in your Gatsby config.
// gatsby-config.js
module.exports = {
plugins: [
{
resolve: 'gatsby-plugin-apollo',
options: {
uri: 'https://example.com/graphql'
}
}
]
};Due to a limitation on the types of options that can be passed to a Gatsby plugin, only certain constructor options can be passed as plugin options. Options that require an instance of a JavaScript class, like cache or link can't be serialized as JSON, so they can't be configured in this way.
For more complex configurations, the client shadowing method allows you to define your own custom Apollo Client instance to be used by the plugin.
You can configure this plugin to use your own custom Apollo Client instance by creating a client.js file in src/gatsby-plugin-apollo that exports your client. You can create your client however you like, as long as you remember these important details:
- You must provide an isomorphic fetch implementation (such as
isomorphic-fetch) as an option toHttpLink - Your client instance must be the default export
// src/gatsby-plugin-apollo/client.js
import fetch from 'isomorphic-fetch';
import {ApolloClient, HttpLink, InMemoryCache} from '@apollo/client';
const client = new ApolloClient({
cache: new InMemoryCache(),
link: new HttpLink({
uri: 'https://api.spacex.land/graphql/',
fetch
})
});
export default client;This configuration method should be used if you need to customize your cache or use a complex link, such as sending a JWT along with every request or enabling subscriptions using a WebSocketLink.
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