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*y...@chromium.org <y...@chromium.org>, cbiesin...@chromium.org <cbiesin...@chromium.org>, tanzach...@chromium.org <tanzach...@chromium.org>*Explainer *https://github.com/fedidcg/FedCM/issues/442 <https://github.com/fedidcg/FedCM/issues/442#issuecomment-1949323416>* Specification *https://fedidcg.github.io/FedCM <https://fedidcg.github.io/FedCM>This will be added as an extension.*Summary *We plan to experiment with two new extensions for the Federated Credential Management (FedCM) API: - Button Mode API- The button mode lets websites trigger FedCM directly when a user clicks a button (like a "Sign-in with IdP" button). This means FedCM will always display a visible user interface for login, in contrast to the widget mode where no UI is shown if a user’s login status is logged out. - When the FedCM API is used in "button mode" and a user isn't logged in, they'll be taken to the IdP login screen (in a pop-up window). Since this happens in response to a clear user action, the UI might even be more prominent (e.g., centered and modal) compared to the more subtle UI of widget mode. - Use Other Account API- With this API, an Identity Provider can request the browser to show a button that allows users to choose other accounts.*Blink component *Blink>Identity>FedCM <https://issues.chromium.org/u/1/issues?q=status:open%20componentid:1456331&s=created_time:desc>*Search tags *fedcm <https://chromestatus.com/features#fedcm>*TAG review *https://github.com/w3ctag/design-reviews/issues/935 <https://github.com/w3ctag/design-reviews/issues/935> *TAG review status *Pending*Risks Interoperability and Compatibility *These are extensions to the FedCM API. Apple and Mozilla have both expressed a positive opinion on the initial FedCM API [1]. They have not yet shipped but Mozilla is prototyping [2]. If a user agent chooses not to implement these extensions, the sign-in flow should not be affected in that user agent because developers can fallback to the existing federated sign-in mechanisms.[1] https://groups.google.com/a/chromium.org/g/blink-dev/c/URpYPPH-YQ4/m/bzghj9N3AQAJ <https://groups.google.com/a/chromium.org/g/blink-dev/c/URpYPPH-YQ4/m/bzghj9N3AQAJ> [2] https://groups.google.com/a/mozilla.org/g/dev-platform/c/ncmUwK1uO98/m/COhPA4ZrAAAJ <https://groups.google.com/a/mozilla.org/g/dev-platform/c/ncmUwK1uO98/m/COhPA4ZrAAAJ> Gecko: No signalWebKit: No signalWeb developers: Positive (https://github.com/fedidcg/FedCM/issues/442 <https://github.com/fedidcg/FedCM/issues/442>) These features are being developed to address existing feedback for the FedCM API.Other signals:* Activation *Similar to the FedCM API, we deliberately leave the bulk of the work to the IdP to ensure that minimal RP change is needed. This feature, specifically, is one that can be currently controlled by IdP (via JS SDK for “button mode”, via server-side config for “use other account”), so we expect activation to have a similar profile as FedCM: immediately enabled to websites (without redeployment) by IdPs making use of it (by redeploying their JS SDKs).*Security *The button mode shares most of the security properties from the widget mode. e.g. honoring CSP, CORS, using security headers, not asking users to type in the browser UI etc.It’s worth noting that the pop-up window has the same web platform properties as what one would get with window.open(url,””,”popup,noopener,noreferrer”) that loads the login_url. It is important to note that there's no communication allowed between the website and this pop-up (e.g. no postMessage, no window.opener). We have shipped LoginStatus API and Error API in FedCM that use this type of pop-up window.*WebView application risks *Does this intent deprecate or change behavior of existing APIs, such that it has potentially high risk for Android WebView-based applications?None*Goals for experimentation *Gather data on whether a browser mediated sign in flow on a critical user journey is well received by users and developers. We'd like to see how the proposed UI/API play out and iterate on them to ship the API in its best shape.*Ongoing technical constraints *None*Debuggability *Same as FedCM in general – console messages in devtools and general JS debugging*Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, ChromeOS, Android, and Android WebView)? *NoFedCM API is not available in WebView*Is this feature fully tested by web-platform-tests <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md> ? *Not yet.We will continue adding tests before the experiment starts.*Flag name on chrome://flags *FedCmButtonMode, FedCmUseOtherAccount*Finch feature name *kFedCmButtonModekFedCmUseOtherAccount*Non-finch justification *None*Requires code in //chrome? *True*Tracking bug *https://crbug.com/40284792 <https://crbug.com/40284792>*Launch bug *https://launch.corp.google.com/launch/4293366 <https://launch.corp.google.com/launch/4293366>*Estimated milestones *OriginTrial desktop last126OriginTrial desktop first124OriginTrial Android last127OriginTrial Android first125*Link to entry on the Chrome Platform Status *https://chromestatus.com/feature/4689551782313984 <https://chromestatus.com/feature/4689551782313984>*Links to previous Intent discussions Intent to prototype: https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CACh2XCPzJ1beiSbsmQqvu9x24zmf6LkGuup%3DgPVyXEx%2Bux9%3Dyg%40mail.gmail.com This intent message was generated by Chrome Platform Status <https://chromestatus.com/>. -- You received this message because you are subscribed to the Google Groups "blink-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to blink-dev+unsubscr...@chromium.org. To view this discussion on the web visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CACh2XCNxFMQeN0%3DBNNCJZcsgK34w6YOJ7p9YaX5jW4xJA7M7Pg%40mail.gmail.com.
