self

js/realm/self.ts

fino:realm/self - child Realm's own communication port.

port is this realm's channel to its parent — the same object the bootstrap exposes as globalThis.realmPort — regardless of where the allocator placed the realm (same-thread context or dedicated reactor thread). In the root realm it is undefined.

Module caching guarantees a single port instance per context. Importing this module from both the entry module and the bootstrap always yields the same object.

import { port } from 'fino:realm/self';

port?.addEventListener('message', (event) => {
  port?.postMessage({ echo: event.data });
});
port?.start();

Constants

`const port`

Message port connecting this child realm to its parent, or undefined in the root realm. The instance is the bootstrap's own child port, so message listeners registered here and via globalThis.realmPort share delivery.

import { port } from 'fino:realm/self';

port?.addEventListener('message', (event) => {
  port?.postMessage({ echo: event.data });
});
port?.start();