[Vuejs]-In the OAuth protocol, how does oauth_callback return the parameters behind #?

Code would be helpful.
I’ll assume by ‘redirected by the routing of vue’ you mean you are using vue-router.
In your routes, you will specify paths which will require auth. Then, have middleware which supplies the auth or re-directs to a page where the authentication (login) can occur.
Is this callback the client’s token? Try taking these interactions out of the URL.