`useBlocker` does not work with `memoryHistory`

[rajzik]

Which project does this relate to?

Router

Describe the bug

When using useBlocker with memoryRouter, blocked page is not blocked.

const Component = () => {

    useBlocker({
        shouldBlockFn: () => true,
    });

    useEffect(() => {
        navigate({ to: '/some-page' });
    }, [])

    return null;
}


const memoryHistory = createMemoryHistory({
    initialEntries: ['/'], // Pass your initial url
});

// Create a new router instance
export const router = createRouter({
    routeTree,
    scrollRestoration: true,
    history: memoryHistory,
});

// Register the router instance for type safety
declare module '@tanstack/react-router' {
    interface Register {
        router: typeof router;
    }
}

export type Router = typeof router;

Your Example Website or App

https://stackblitz.com/edit/github-g3ejtttf

Steps to Reproduce the Bug or Issue

1. create memory history
2. set router history in createRouter to memoryHistory
3. use useBlocker with shouldBlockFn: () => true
4. Page navigation is not blocked

Expected behavior

As a user I expected blocked navigation no matter the history I use.

Screenshots or Videos

No response

Platform

• Router / Start Version: 1.150.0
• OS: macOd
• Browser: Chrome
• Browser Version: 143.0.7499.193
• Bundler: Vite
• Bundler Version: 7.2.6

Additional context

No response

[brenelz]

Can you see if the above pr would solve your issue?