阿波罗graphQL订阅要使用的包

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

// 创建WebSocket链接
const wsLink = new WebSocketLink({
  uri: 'wss://your-graphql-server.com/subscriptions',
  options: {
    reconnect: true,
  },
});

// 创建Apollo客户端
const client = new ApolloClient({
  link: wsLink,
  cache: new InMemoryCache(),
});

// 定义订阅查询
const SUBSCRIPTION_QUERY = gql`
  subscription {
    newPost {
      id
      title
      content
    }
  }
`;

// 订阅数据更改
const subscription = client.subscribe({ query: SUBSCRIPTION_QUERY });

// 处理订阅更新
subscription.subscribe({
  next(data) {
    console.log('New post:', data);
    // 在这里更新应用程序的UI或执行其他操作
  },
  error(err) {
    console.error('Subscription error:', err);
  },
});