즉시 사용자 참여 유도: React SPA에 대화형 데모 삽입

+import { MemoryRouter, UNSAFE_LocationContext } from 'react-router'

export const InteractiveDemo = () => {
    return (
+       // Hack to nest MemoryRouter inside BrowserRouter.
+       // https://github.com/remix-run/react-router/issues/7375
+       <UNSAFE_LocationContext.Provider value={null}>
+           <MemoryRouter initialEntries={['/app']}>
                <App />
+           </MemoryRouter>
+       </UNSAFE_LocationContext.Provider>
    )
}

import { InMemoryCache } from '@apollo/client'
import { createMockClient, createMockSubscription } from 'mock-apollo-client'
import { useMemo, useState } from 'react'
// GraphQL documents that our client sends to the real server
import GET_FRIENDS from '../../gql/getFriends.gql'
import ADD_FRIEND from '../../gql/addFriend.gql'

// Simplified example
export const useDemoClient = () => {
    const [friends, setFriends] = useState[{
        __typename: 'User',
        id: 1,
        name: 'Nick',
    }]

    // Cache should persist across clients
    const cache = useMemo(() => { 
        // Should be the same cache configuration you provide to your real Apollo client
        return new InMemoryCache() 
    }, [])

    // We need to recreate the mock client whenever the data changes
    // because it doesn't support resetting request handlers.
    const mockClient = useMemo(() => {
        const client = createMockClient({ cache })

        client.setRequestHandler(GET_FRIENDS, () => Promise.resolve({
            data: {
                friends: friends
            }
        }))
        client.setRequestHandler(ADD_FRIEND, ({ user }) => {
            setFriends((prev) => prev.concat([user]))
            return Promise.resolve({
                data: {
                    addFriend: user
                }
            })
        })

        return client
    }, [friends])

    return mockClient
}

+import { ApolloProvider } from '@apollo/client'

export const InteractiveDemo = () => {
+   const demoClient = useDemoClient()
    return (
+       <ApolloProvider client={demoClient}> 
            <UNSAFE_LocationContext.Provider value={null}>
                <MemoryRouter initialEntries={['/app']}>
                    <App />
                </MemoryRouter>
            </UNSAFE_LocationContext.Provider>
+       </ApolloProvider>
    )
}