he constructor takes a channelName to connect to, and generates an id for this client. In this implementation, we create a new Ably instance, and connect to the channelName which was given, passing a generated clientId.

Swarm3.ts

constructor(channelName: string) {
    this.id = Math.floor(Math.random() * 1000000) + "";
    this.ably = new Ably.Realtime({ key: "api-key-here", clientId: this.id });
    this.channel = this.ably.channels.get(channelName);
}