Tap a Target with no server

host.attach(targetId) creates a real isolated Session using the same Host–Frame path as a remote Client, but without a WebSocket.

import { IcdpHost } from "@olimsaidov/icdp/host";

const host = new IcdpHost();
// host.pair(...) first

const session = host.attach("app-1");
const off = session.onEvent((method, params) => {
  if (method === "Runtime.consoleAPICalled") {
    console.log("frame console:", params);
  }
});

await session.send("Runtime.enable");

Subscribe before enabling the domain so the first state events are visible. send resolves with the CDP result and rejects with an Error whose numeric .code is the CDP error code.

Isolation

Every attachment has its own Frame Session. Enabling Runtime locally does not enable Runtime for a remote Client, and one Session's disable cannot turn off another Session. DOM frontend ids, Runtime handles, enabled domains, and events are also isolated.

Cleanup

off();
session.detach();

Detach clears this Session, rejects its pending calls, and stops its events. It does not affect other Sessions or the Relay uplink.

See the Host reference for the complete LocalSession shape.