SPA Return 401 instead of redirect to login #spring-security

noRedirectReturn401.java

@Bean
public SecurityFilterChain defaultSecurityFilterChain(HttpSecurity http) throws Exception {
    LOGGER.debug("in configure HttpSecurity");
    // Return HttpStatus.UNAUTHORIZED (401) to SPAs.
    http.exceptionHandling(eh ->
        eh.authenticationEntryPoint(new HttpStatusEntryPoint(HttpStatus.UNAUTHORIZED)));
    // ...
    http.formLogin(fl ->
        fl
            .successHandler((req, res, auth) -> res.setStatus(HttpStatus.OK.value()))
            .failureHandler((req, res, auth) -> res.setStatus(HttpStatus.UNAUTHORIZED.value()))
    );

    return http.build();
}