What is the expected behaviour of ssr:false

[candid quartz]

I asked a previous question that ssr:false breaks vinxi. I now use https://tanstack.com/router/v1/docs/framework/react/examples/basic-ssr-file-based as my starting point so i only run "node server.js".
My entry-server.tsx is also identical. As soon as i set ssr:false on a route it is correctly not rendered on the server, but it is also not rendered on the client so it never appears. Do i need to declare the route differently?
This does not render anything:

import { createFileRoute } from "@tanstack/react-router";

export const Route = createFileRoute("/about")({
    component: About,
    ssr: false,
});

function About() {
    return <div className="p-2">Hello from About!</div>;
}

[candid quartz]

Hm I am now running the exact example locally (checked out the repo) and can't reproduce this. however slightly adapting the component, the text "this is a server component" is still briefly visible, so SSR is not really disabled?

I am still on react 18 and have react-router (v7) still installed (exploring the migration), could that be a problem?

import { createFileRoute } from '@tanstack/react-router'
import * as React from 'react'

export const Route = createFileRoute('/error')({
  component: ErrorComponent,
  ssr: false,

})

function ErrorComponent() {
  const isServer = typeof window === 'undefined'
  return (
    <div className="p-2">
      <h3>The loader of this page has a 50% chance of throwing an error!</h3>
      {isServer && <p>This is a server component</p>}
    </div>
  )
}

oh an important piece of information: i am actually just using start for SSR and want to stick with tanstack/router for now

[candid quartz]

I found my issue. The Quick start does not specify to add the <Script/> tag here: https://tanstack.com/router/v1/docs/framework/react/quick-start#srcroutes__roottsx
Neither does the SSR guide, so you end up without it, but it is required for SSR to work.

[frail lotus]

https://tanstack.com/start/latest/docs/framework/react/build-from-scratch#the-root-of-your-application

[frail lotus]

it is indicated

if you want server capabilities, check tanstack Start