正在为NextJS实现Apollo客户端，但获取无法读取未定义的属性“”WebSocket“”

npm install apollo-client apollo-link-ws apollo-utilities subscriptions-transport-ws

import { ApolloClient } from 'apollo-client';
import { WebSocketLink } from 'apollo-link-ws';
import { InMemoryCache } from 'apollo-cache-inmemory';

const client = new ApolloClient({
  link: new WebSocketLink({
    uri: 'ws://your-graphql-endpoint',
    options: {
      reconnect: true,
    },
  }),
  cache: new InMemoryCache(),
});

import { ApolloProvider } from '@apollo/react-hooks';
import ApolloClient from 'apollo-client';

function MyApp({ Component, pageProps }) {
  const client = new ApolloClient({
    // Apollo客户端配置
  });

  return (
    <ApolloProvider client={client}>
      <Component {...pageProps} />
    </ApolloProvider>
  );
}

export default MyApp;