Fixes DOCS-651
## I have read the
[CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md)
file.
YES
## What kind of change does this PR introduce?
This adds a non-null assertion to a Supabase method that expects
non-null.
Additionally, it updates a label from 'Remix' to 'React Router'.
## What is the current behavior?
Two issues:
- Following the Auth client steps with React Router creates a
`deprecation` error and downstream Typescript errors.
- 'Remix' is renamed to 'React Router'.
> Remix and React Router are the same thing, made by the same people.
Remix was simply renamed React Router Framework Mode starting in version
7 of React Router.
- [Blog
Source](https://reacttraining.com/blog/remix-vs-react-router-framework)
<img width="894" height="754" alt="Screenshot 2026-06-04 at 4 00 45 PM"
src="https://github.com/user-attachments/assets/33dc5d89-4a76-44b6-a5c3-39a30dca3b57"
/>
<img width="604" height="464" alt="Screenshot 2026-06-05 at 11 21 54 AM"
src="https://github.com/user-attachments/assets/10ea458f-22e5-498c-b43a-df13f7902a17"
/>
## What is the new behavior?
- Adding a non-null assertion clears up all error. Running the
application does not produce errors.
- Changing the label from "Remix" to "React Router" updates the dropdown
name to match the rebrand. Now, it does not look outdated and matches
the docs.
<img width="609" height="519" alt="Screenshot 2026-06-05 at 11 22 48 AM"
src="https://github.com/user-attachments/assets/c18ee5b7-4693-40c9-9c20-8f95756c8298"
/>
## Additional context
The task was to clarify our documentation on this page: [Create a
Client](https://supabase.com/docs/guides/auth/server-side/creating-a-client?queryGroups=framework&framework=react-router&queryGroups=environment&environment=react-router-loader#create-a-client)
However, the code sample in the docs is correct; the documentation in
**Dashboard** produced the errors.
## Future improvements
- To make this more robust, the code could have a single source of
truth.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Bug Fixes**
* Clarified generated Supabase server client template text to improve
type/reference safety in the Remix integration guide.
* **UI**
* Renamed framework label from "Remix" to "React Router" across the
Connect interfaces for clearer framework identification.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
---------
Co-authored-by: Miranda Limonczenko <mirandalimonczenko@Mirandas-MacBook-Pro.local>
## Summary
Removes `_DEFAULT` from the publishable key env var name across all
Connect and ConnectSheet framework content, so that e.g.
`NEXT_PUBLIC_SUPABASE_PUBLISHABLE_DEFAULT_KEY` becomes
`NEXT_PUBLIC_SUPABASE_PUBLISHABLE_KEY`. This matches the docs and sample
apps.
### Connect
- Next.js (App Router)
- Next.js (Pages Router)
- React (Create React App)
- React (Vite)
- Remix
- SolidJS
- SvelteKit
### ConnectSheet
- Next.js (App Router)
- Next.js (Pages Router)
- React (Create React App)
- React (Vite)
- Remix
- SolidJS
- SvelteKit
- Vue.js
- shadcn env step
Resolves FE-2934
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Bug Fixes**
* Standardized environment variable names in generated connection/setup
instructions: when a publishable key is present the templates now
reference the publishable env var (e.g.,
NEXT_PUBLIC_SUPABASE_PUBLISHABLE_KEY, VITE_SUPABASE_PUBLISHABLE_KEY,
REACT_APP_SUPABASE_PUBLISHABLE_KEY, etc.) with unchanged anon-key
fallback behavior.
* Updated cURL/tab placeholders to reflect the new publishable-key
identifier when hiding keys.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
This is part two of a [PR
breakdown](https://github.com/supabase/supabase/pull/42276) that
introduces our connect schema and how content is retrieved. This focuses
on the Framework tab to start.
Fields are generated and content is rendered using a connect.schema
file. This schema file defines modes, fields and steps. Each mode has a
set of fields. Each field can be dependent on another field. The steps
generated are then based off the values of the modes and fields. Each
step can also render varying content dynamically using a template
{{framework}}/{{frameworkVariant}}/{{library}} which just replaces those
values with what's in state (fields selected).
[Part one needs to be merged
first.](https://github.com/supabase/supabase/pull/42367)
The next stage will add back all other tabs and content.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* New Connect Sheet UI to guide app-to-project connections with dynamic
configuration and copyable connection parameters.
* Multi-framework & mobile support with ready-to-use code examples,
install commands, and step-by-step setup for 20+ frameworks.
* Multiple PostgreSQL connection methods (direct, transaction, session)
with safe/masked connection previews.
* Copy-prompt that aggregates step content and code for easy sharing.
* **UI**
* Multi-file code viewer with tabbed code blocks and added syntax
support (Swift, TOML, HTML).
* **Tests**
* Comprehensive unit tests for resolver and state logic.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
---------
Co-authored-by: Joshen Lim <joshenlimek@gmail.com>
