Function setup

packages/platform-browser/src/internal/worker.ts:9–20

({ scope, worker })

const platformWorkerImpl = Worker.makePlatform<globalThis.SharedWorker | globalThis.Worker | MessagePort>()({
  setup({ scope, worker }) {
    const port = "port" in worker ? worker.port : worker
    return Effect.as(
      Scope.addFinalizer(
        scope,
        Effect.sync(() => {
          port.postMessage([1])
        })
      ),
      port
    )
  },
  listen({ deferred, emit, port, scope }) {
    function onMessage(event: MessageEvent) {
      emit(event.data)