Fix ApolloClient initialization for newer versions #4128
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The previous ApolloClient setup used:
const client = new ApolloClient({
uri: 'http://localhost:4000',
cache: new InMemoryCache(),
})
With recent Apollo Client versions (4.0.3), this triggers:
Uncaught Invariant Violation: To initialize Apollo Client, you must specify a 'link' property.
This update adds an explicit HttpLink:
const client = new ApolloClient({
cache: new InMemoryCache(),
link: new HttpLink({ uri: 'http://localhost:4000' }),
});
This ensures compatibility with newer Apollo Client releases without changing existing functionality.
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This PR updates the ApolloClient initialization in the course material to be compatible with recent versions (tested with 4.0.3).
Previously, the client was initialized as:
const client = new ApolloClient({
uri: 'http://localhost:4000',
cache: new InMemoryCache(),
})
This setup triggers the following error on newer Apollo Client versions:
Uncaught Invariant Violation: To initialize Apollo Client, you must specify a 'link' property.
The updated initialization adds an explicit HttpLink:
const client = new ApolloClient({
cache: new InMemoryCache(),
link: new HttpLink({ uri: 'http://localhost:4000' }),
});
This ensures compatibility with current versions while preserving the intended functionality.
Corresponding course part: Part 8