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  • import { useApolloClient } from '@apollo/client';
    
    function SomeComponent() {
      const client = useApolloClient();
      // `client` is now set to the `ApolloClient` instance being used by the
      // application (that was configured using something like `ApolloProvider`)
    }
    Docs
  • function SomeComponent() {
      const client = useApolloClient();
      // `client` is now set to the `ApolloClient` instance being used by the
      // application (that was configured using something like `ApolloProvider`)
    }
    Docs
  • import React from 'react';
    import { render } from 'react-dom';
    import {
      ApolloClient,
      InMemoryCache,
      ApolloProvider,
      useQuery,
      gql
    } from "@apollo/client";
    
    const client = new ApolloClient({
      uri: 'https://48p1r2roz4.sse.codesandbox.io',
      cache: new InMemoryCache()
    });
    
    function App() {
      return (
        <div>
          <h2>My first Apollo app 🚀</h2>
        </div>
      );
    }
    
    render(
      <ApolloProvider client={client}>
        <App />
      </ApolloProvider>,
      document.getElementById('root'),
    );
    Docs
  • import React from "react";
    import { ApolloConsumer, useApolloClient, useQuery, gql } from "@apollo/client";
    
    const GET_MESSAGE_COUNT = gql`
      query GetMessageCount {
        messageCount @client {
          total
        }
      }
    `;
    
    const resolvers = {
      Query: {
        messageCount: (_, args, { cache }) => {
          // ... calculate and return the number of messages in
          // the cache ...
          return {
            total: 123,
            __typename: "MessageCount",
          };
        },
      },
    };
    
    export function MessageCount() {
      const client = useApolloClient();
      client.addResolvers(resolvers);
    
      const { loading, data: { messageCount } } = useQuery(GET_MESSAGE_COUNT);
    
      if (loading) return "Loading ...";
    
      return (
        <p>
          Total number of messages: {messageCount.total}
        </p>
      );
    };
    Docs
  • import React from "react";
    import { gql, useQuery } from "@apollo/client";
    
    import Todo from "./Todo";
    
    const GET_TODOS = gql`
      query GetTodos {
        todos @client {
          id
          completed
          text
        }
        visibilityFilter @client
      }
    `;
    
    function TodoList() {
      const { data: { todos, visibilityFilter } } = useQuery(GET_TODOS);
      return (
        <ul>
          {getVisibleTodos(todos, visibilityFilter).map(todo => (
            <Todo key={todo.id} {...todo} />
          ))}
        </ul>
      );
    }
    Docs
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