Manage State in React Apps with Apollo Client and GraphQL by Rares Matei

• Perform GraphQL queries using Apollo's useQuery hook
• Why have a client-side GraphQL cache?
• Use fetch policies in Apollo to keep your queries fast and fresh with the latest data
• Handle loading states for your GraphQL queries
• Handle GraphQL query error states using Apollo
• Use the RetryLink in Apollo to retry queries after an error
• Make GraphQL mutations with the useMutation Apollo hook
• Understand how Apollo stores data in its cache
• Update the local cache automatically when making mutations
• Optimise queries to ensure all entities are normalised in the Apollo cache
• Handle item deletions in Apollo using refetchQueries
• Manually modify the cache to remove deleted items
• Use optimistic updates to build UIs that react immediately to user actions
• Evict deleted items from the Apollo cache
• Use fetchMore and merge field policies to dynamically load more items into a list
• Use "read" field policies to query local client state
• Use the readField helper to get the ID of items in read field policies
• Use reactive variables to hold local client state in Apollo's cache
• Implement cache redirect policies to avoid slow network requests for new queries
• Incrementally migrate from REST to GraphQL using the RestLink
• Keep queries in sync with the backend by polling for new data
• Subscribe to immediate live updates from your server
• Append GraphQL subscription updates to existing queries
• Provide quick app start-up times by syncing the Apollo cache with local storage