Google Popup Login

GSI's HTML/JS API accepts both a JS callback and a login_uri at the same time. With ux_mode: 'popup', GSI opens the Google account chooser in a popup/iframe and, once the user picks an account, transforms that interaction into a direct call to your JS callback with a signed ID token — no page navigation happens on your site. login_uri is required by GSI as a fallback target it will POST the credential to (as a real form submission) only if JavaScript/popups are unavailable. That fallback page is google-login-redirect.html in this repo. On a static test site like this one there's no server to read that POST, so real logins always go through the popup + callback path below.

When this page runs inside a native Android/iOS WebView, the native app can perform its own native Google Sign-In and hand the result straight to this page instead of going through the web popup above — call window.handleNativeGoogleLogin(jwt) directly, e.g. from Android with webview.loadUrl("javascript:handleNativeGoogleLogin('" + jwt + "')") or from iOS with webView.evaluateJavaScript("handleNativeGoogleLogin('\(jwt)')"). It accepts a raw ID token JWT string, a JSON string, or an object containing a credential / idToken / id_token / jwt / token field, decodes it, and renders the same profile UI as the popup flow.

No token yet.