![]() ![]() When the popup finishes redirecting to the application after authentication, code in the redirect handler will store the code, and tokens in local storage for the application to use. If the user experience (UX) of a full page redirect doesn't work for the application, consider using a popup to handle authentication. Consider having a pre-load sequence in the app that checks for a login session and redirects to the login page before the app fully unpacks and executes the JavaScript payload.Follow best practices for caching of SPAs so that the app isn't downloaded in-full twice. The redirect does result in the SPA being loaded twice.The user's browser will visit the login page, present the cookies containing the user session, and then redirect back to the application with the code and tokens in a fragment. On the first load of the SPA, redirect the user to the sign-in page if no session already exists (or if the session is expired).There are two ways of accomplishing sign-in: Because prompt=none in an iframe is no longer an option when third-party cookies are blocked, applications must visit the login page in a top-level frame to have an authorization code issued. This pattern meant applications didn't need a full page redirect to sign the user in, improving performance and user experience - the user visits the web page and is signed in already. In most browsers, this request will respond with tokens for the currently signed-in user (assuming consent has already been granted). Some applications using the implicit flow attempt sign-in without redirecting by opening a login iframe using prompt=none. Refresh tokens issued through the authorization code flow to spa redirect URIs have a 24-hour lifetime rather than a 90-day lifetime.
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