feat(examples): add cross-origin host toggle to iframe-test page#136
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Shridhad wants to merge 1 commit into
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feat(examples): add cross-origin host toggle to iframe-test page#136Shridhad wants to merge 1 commit into
Shridhad wants to merge 1 commit into
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Adds a Host selector to /iframe-test so the embedded src can switch between the local app (same-origin, localhost:3000) and the deployed demo (cross-origin, https://neon-auth-nextjs-demo.vercel.app). This exercises the more realistic embedded scenario where the parent page and the embedded auth app are on different domains — widgets, multi-tenant platforms, and partner integrations. Also expands the "What to test" notes to cover the third-party cookie considerations (SameSite=None; Secure; Partitioned) that apply to cross-origin iframes.
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thekauer
approved these changes
May 22, 2026
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Summary
Follow-up to #135. Adds a Host selector to
/iframe-testso the embeddedsrccan switch between:localhost:3000, the same app rendering the page (covers same-origin embedding)https://neon-auth-nextjs-demo.vercel.app, so the parent page and the embedded auth app live on different domainsThe cross-origin case is the more realistic embedded scenario — widgets, multi-tenant platforms, partner integrations, customer-facing dashboards, etc. — where most "auth in iframe" things break in subtle ways. This lets the example exercise both code paths from a single dev server.
The deployed app at
neon-auth-nextjs-demo.vercel.appdoes not setX-Frame-Optionsor aframe-ancestorsCSP (verified viacurl -I), so it embeds cleanly.@neondatabase/authalready setsSameSite=None; Secure; Partitionedproxy cookies (#132), which is what's needed for the iframe's session cookies to survive the third-party context.The "What to test" notes are expanded to call out the third-party cookie behaviour explicitly so adopters know what browser policies are at play.
Test plan
cd examples/nextjs-neon-auth && pnpm devhttp://localhost:3000/iframe-testvercel.app(Application → Cookies in DevTools)vercel.app, completes, closes, and the iframe shows the signed-in stateX-Frame-Options/ CSP errors for either host