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fix(clerk-js): Remove condition to always send redirect_url for SSO with after-auth #6498

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@LauraBeatris LauraBeatris commented Aug 9, 2025

Description

Context

This was previously introduced for FAPI to avoid redirecting to, for example, /dashboard, if the sign-in/sign-up was complete but with a pending session.

The problem is that the SDK couldn't know ahead of time if the session created by sign-in/sign-up would be pending, and it was navigating to /sso-callback for all sign-ins/sign-ups, even when the task was already satisfied.

What's the fix now

We're removing this condition, and moving the logic to FAPI: https://github.com/clerk/clerk_go/pull/13037

For SPAs, as long as their apps are protected with SignedIn or SignedOut on private routes, or for server-side protections like auth.protect, it should also handle the case where FAPI redirects to redirect_url_complete while the PR above isn't merged.

Checklist

  • pnpm test runs as expected.
  • pnpm build runs as expected.
  • (If applicable) JSDoc comments have been added or updated for any package exports
  • (If applicable) Documentation has been updated

Type of change

  • 🐛 Bug fix
  • 🌟 New feature
  • 🔨 Breaking change
  • 📖 Refactoring / dependency upgrade / documentation
  • other:

Summary by CodeRabbit

  • Bug Fixes
    • Improved redirect URL handling during single sign-on (SSO) flows after authentication, ensuring more consistent and predictable redirection behavior for users.

@LauraBeatris LauraBeatris self-assigned this Aug 9, 2025
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changeset-bot bot commented Aug 9, 2025

🦋 Changeset detected

Latest commit: 5657b07

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 3 packages
Name Type
@clerk/clerk-js Patch
@clerk/chrome-extension Patch
@clerk/clerk-expo Patch

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@LauraBeatris LauraBeatris requested a review from a team August 9, 2025 01:00
@LauraBeatris LauraBeatris marked this pull request as ready for review August 9, 2025 01:04
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coderabbitai bot commented Aug 9, 2025

📝 Walkthrough

Walkthrough

The changes update the redirect URL handling logic for single sign-on (SSO) flows in the @clerk/clerk-js package. Specifically, the logic that previously modified or augmented the redirect_url parameter—by appending an auth token or conditionally using redirect_url_complete—has been removed from both the SignIn and SignUp resource modules. The code now directly passes the original or complete redirect URL without additional processing or conditional logic based on internal flags. Associated utility imports and related comments were also removed.

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🎯 2 (Simple) | ⏱️ ~8 minutes


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commit: 5657b07

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Actionable comments posted: 0

🔭 Outside diff range comments (1)
.changeset/mighty-ducks-occur.md (1)

6-6: Remove stray character on the last line

There’s a lone "6" on the final line that will end up in release notes and can confuse readers.

Apply this diff:

-6
+
🧹 Nitpick comments (4)
.changeset/mighty-ducks-occur.md (1)

5-5: Optional: tighten up the summary sentence

Add a period and optionally clarify “after-auth flows” to improve the release note readability.

-Remove sending `redirect_url_complete` as `redirect_url` for SSO with after-auth flows
+Remove sending `redirect_url_complete` as `redirect_url` for SSO with after-auth flows.
packages/clerk-js/src/core/resources/SignUp.ts (1)

291-303: Parity check: confirm whether redirectUrl should still include auth token here

SignUp still uses redirectUrlWithAuthToken while SignIn switched to passing raw redirectUrl during the initial create path (but still uses buildUrlWithAuth in prepare-first-factor for SSO). If the intent is to unify semantics across SignIn/SignUp, consider passing the raw redirectUrl here as well. Otherwise, please confirm this difference is intentional.

If alignment is desired, here’s a minimal change:

-    const redirectUrlWithAuthToken = SignUp.clerk.buildUrlWithAuth(redirectUrl);
-
     const authenticateFn = () => {
       const authParams = {
         strategy,
-        redirectUrl: redirectUrlWithAuthToken,
+        redirectUrl,
         actionCompleteRedirectUrl: redirectUrlComplete,
         unsafeMetadata,
         emailAddress,
         legalAccepted,
         oidcPrompt,
       };
       return continueSignUp && this.id ? this.update(authParams) : this.create(authParams);
     };

Also, please add tests to ensure:

  • actionCompleteRedirectUrl is forwarded as redirectUrlComplete.
  • redirectUrl is not replaced with redirect_url_complete.
packages/clerk-js/src/core/resources/SignIn.ts (2)

587-595: Align SignInFuture.sso with the new semantics (optional)

This path still constructs redirectUrlWithAuthToken for the initial create. To avoid divergent behavior between SignIn.authenticateWithRedirectOrPopup and SignInFuture.sso, consider passing the raw redirectUrl and relying on FAPI + prepare flow to handle auth URL construction where needed.

-      const redirectUrlWithAuthToken = SignIn.clerk.buildUrlWithAuth(redirectUrl);
-
       if (!this.resource.id) {
         await this.create({
           strategy,
-          redirectUrl: redirectUrlWithAuthToken,
+          redirectUrl,
           actionCompleteRedirectUrl: redirectUrlComplete,
         });
       }

Please also add/update tests to cover:

  • create receives raw redirectUrl in this path.
  • end-to-end navigation remains correct for SSO via SignInFuture.sso.

282-294: Add tests to lock the new behavior

Please add unit/integration tests verifying:

  • create is invoked with raw redirectUrl and actionCompleteRedirectUrl = redirectUrlComplete.
  • For SSO strategies, prepare-first-factor uses the appropriate URL builder (if still required).
  • The SDK does not navigate to /sso-callback prematurely when the session is not pending.

I can draft the test scaffolding for these flows (mocks for FAPI client + navigation), if helpful.

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  • packages/clerk-js/src/core/resources/SignIn.ts (1 hunks)
  • packages/clerk-js/src/core/resources/SignUp.ts (1 hunks)
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🔇 Additional comments (4)
.changeset/mighty-ducks-occur.md (1)

2-5: Changeset entry is appropriate (patch) and message is clear

Patch bump for '@clerk/clerk-js' aligns with the described behavioral change. Looks good.

packages/clerk-js/src/core/resources/SignUp.ts (1)

294-299: Directly using redirectUrlComplete for actionCompleteRedirectUrl is correct

This aligns the responsibility with FAPI and removes the SDK-side conditional. Good step toward simplifying after-auth SSO.

packages/clerk-js/src/core/resources/SignIn.ts (2)

252-261: Good: SDK stops replacing redirect_url and delegates completion to FAPI

Using actionCompleteRedirectUrl = redirectUrlComplete and passing raw redirectUrl during create simplifies the flow and aligns with the stated direction.


264-271: SSO prepare flow: No changes needed to buildUrlWithAuth

We scanned every occurrence of buildUrlWithAuth—it’s applied uniformly across all redirect-based authentication flows (SignIn, SignUp, email-link verification, enterprise SSO/SAML, third-party redirects, popup flows, etc.) to ensure development-mode tokens are bound to those URLs. Removing it here would introduce an inconsistency and break token binding in non-production environments.

• Key usages in SSO prepare flow

  • packages/clerk-js/src/core/resources/SignIn.ts (lines 264–271 and 586–590)
  • packages/clerk-js/src/core/resources/SignUp.ts (lines 291–294)
  • packages/elements/src/internals/machines/third-party/third-party.actors.ts (lines 32–36)
  • packages/utils/authenticateWithPopup.ts (lines 33–39)

All other flows rely on the same augmentation, so we should keep calling buildUrlWithAuth(redirectUrl) here.

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