The redirect URI must be marked as type spa to enable CORS on login endpoints.PKCE is recommended for native and confidential clients. PKCE is required for SPAs on the Microsoft identity platform.Microsoft Authentication Library (MSAL) for JavaScript v2.0, implements the authorization code flow for SPAs and, with minor updates, is a drop-in replacement for MSAL.js 1.x.įor the Microsoft identity platform, SPAs and native clients follow similar protocol guidance: When the app requires new tokens, it can use the refresh token flow to get new tokens. In the auth code flow, the identity provider issues a code, and the SPA redeems the code for an access token and a refresh token. To continue authenticating users in SPAs, app developers must use the authorization code flow. The solution outlined in this article works in all of these browsers, or anywhere third-party cookies are blocked. Brave blocks third-party cookies by default, and Chromium (the platform behind Google Chrome and Microsoft Edge) has announced that they as well will stop supporting third-party cookies in the future. Safari isn't alone in blocking third-party cookies to enhance user privacy. When a browser blocks third-party cookies to prevent user tracking, SPAs are also broken. Unfortunately, this pattern is also the standard way of implementing the implicit flow in single-page apps (SPAs). ITP blocks "third-party" cookies, cookies on requests that cross domains.Ī common form of user tracking is done by loading an iframe to third-party site in the background and using cookies to correlate the user across the Internet. What is Intelligent Tracking Protection (ITP)?Īpple Safari has an on-by-default privacy protection feature called Intelligent Tracking Protection, or ITP. In the Microsoft identity platform, we use the authorization flow with Proof Key for Code Exchange (PKCE) and refresh tokens to keep users signed in when third-party cookies are blocked. This block breaks the implicit flow and requires new authentication patterns to successfully sign in users. Many browsers block third-party cookies, cookies on requests to domains other than the domain shown in the browser's address bar.
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