fix(clerk-js): Respect proxyUrl and domain in non-browser environments

[brkalow]

Description

It's possible for non-browser environments to provide a domain or proxyUrl, but clerk-js currently ignores the provided values when not in a browser. This PR updates clerk-js so the provided value is now respected in non-browser environments.

The only caveat is that we cannot accept a function for the value in expo, as we are unable to provide the current base URL (window.location.href).

fixes AIE-644

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

• New Features

  • Added support for configuring proxy URLs and custom domains in non-browser environments.

• Bug Fixes

  • Enhanced validation to ensure proxy URLs are absolute HTTP(S) URLs in native environments.
  • Improved error handling when domain or proxy URL configurations are provided as functions in non-browser contexts.

• Tests

  • Expanded test coverage for non-browser runtime configuration scenarios.

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Project	Deployment	Actions	Updated (UTC)
clerk-js-sandbox	Ready	Preview, Comment	Mar 17, 2026 3:16am

[changeset-bot]

🦋 Changeset detected

Latest commit: 870b2b9

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

This PR includes changesets to release 21 packages

Name	Type
@clerk/clerk-js	Patch
@clerk/shared	Patch
@clerk/expo	Patch
@clerk/chrome-extension	Patch
@clerk/agent-toolkit	Patch
@clerk/astro	Patch
@clerk/backend	Patch
@clerk/expo-passkeys	Patch
@clerk/express	Patch
@clerk/fastify	Patch
@clerk/hono	Patch
@clerk/localizations	Patch
@clerk/msw	Patch
@clerk/nextjs	Patch
@clerk/nuxt	Patch
@clerk/react-router	Patch
@clerk/react	Patch
@clerk/tanstack-react-start	Patch
@clerk/testing	Patch
@clerk/ui	Patch
@clerk/vue	Patch

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[pkg-pr-new]

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@clerk/agent-toolkit

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@clerk/astro

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@clerk/vue

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commit: 870b2b9

[coderabbitai]

📝 Walkthrough

Walkthrough

This change adds support for proxyUrl and domain configuration in non-browser environments for Clerk packages. The modifications include: adding validation logic for proxyUrl in native runtimes to ensure absolute URLs, implementing getter methods in Clerk.ts that handle function-type values by logging warnings and returning empty strings in non-browser contexts, introducing a new assertValidProxyUrl utility function for runtime checks, adding warning messages for unsupported function-type properties, and extending test coverage to verify correct baseUrl resolution behavior in non-browser runtimes when domain or proxyUrl are configured.

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and accurately summarizes the main change: making clerk-js respect proxyUrl and domain configuration in non-browser environments, which is the primary objective of this PR.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

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📝 Coding Plan

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