All default authentication pages (login, logout, forgotten password, etc.) are automatically attempting to load
custom.js file that can be used for manipulation with page UI. This file is common to all those pages and the expected location is
Among other things you can hide or modify all standard buttons on the authentication pages (Login, Cancel, Submit…) referencing their ids.
If the application is using external authentication providers, the login page contains for each provider a dedicated login button. The
id of such button is in form
loginButton-AuthenticationScheme , where