Do you have experience working with WebSocket? With GraphQL?

Yes, I have experience working with WebSocket and GraphQL.

I used WebSocket for implementing real-time features in applications, such as chat or data updates without page reloads. I utilized the standard WebSocket API in the browser and server-side libraries to support the connection.

Example of a simple WebSocket connection:

const socket = new WebSocket('wss://example.com/socket');
socket.onmessage = (event) => {
  console.log('Received message:', event.data);
};
socket.onopen = () => {
  socket.send('Hello server!');
};

With GraphQL, I worked on building APIs where the client could request only the needed data. I used Apollo Client on the frontend, which made managing requests and caching convenient.

Example of a GraphQL query with Apollo:

import { gql, useQuery } from '@apollo/client';

const GET_USER = gql`
  query GetUser($id: ID!) {
    user(id: $id) {
      id
      name
      email
    }
  }
`;

function User({ userId }) {
  const { loading, error, data } = useQuery(GET_USER, { variables: { id: userId } });

  if (loading) return 'Loading...';
  if (error) return `Error: ${error.message}`;

  return <div>{data.user.name} - {data.user.email}</div>;
}