List.js

function List({ groupName, members = [] }) {
  return (
    <div>
      <h5>
        Group: <em>{groupName}</em>
      </h5>
      <ul>
        <p>Members</p>
        {members.map((member) => (
          <li key={member}>{member}</li>
        ))}
      </ul>
    </div>
  )
}