fix(react-form-start): replace deprecated inputValidator with validator by smorimoto · Pull Request #2230 · TanStack/form

smorimoto · 2026-07-02T14:28:15Z

Summary

TanStack Start has deprecated createServerFn().inputValidator() in favour of .validator(). Projects using @tanstack/react-form-start were seeing a build-time deprecation warning from the Start compiler.

This PR updates the library, example, and SSR documentation to use the new API, and bumps the @tanstack/react-start peer dependency to ^1.168.27, which includes the validator() method.

Changes

Replace .inputValidator() with .validator() in createServerValidate.tsx
Update the TanStack Start example and SSR guide
Bump @tanstack/react-start to ^1.168.27 in react-form-start and the example
Refresh pnpm-lock.yaml and add minimumReleaseAgeExclude entries for the updated TanStack packages

Test plan

Built @tanstack/react-form and @tanstack/react-form-start successfully
Verify the deprecation warning no longer appears when running the TanStack Start example

Summary by CodeRabbit

Bug Fixes
- Updated form/server validation configuration to align with the latest TanStack Start validation API, ensuring POST request validation continues to work correctly.
Documentation
- Updated the SSR “Start integration” guide to reflect the current validation syntax.
Chores
- Bumped TanStack Start dependency versions in the React form/start example and related packages.
- Adjusted dependency declarations in the Next.js and Remix packages to rely on peer dependencies only.

coderabbitai · 2026-07-02T14:28:38Z

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 54b9b326-4a97-45c1-8b98-dad7773adf03

📥 Commits

Reviewing files that changed from the base of the PR and between f25ed02 and 88bfc4a.

⛔ Files ignored due to path filters (1)

pnpm-lock.yaml is excluded by !**/pnpm-lock.yaml

📒 Files selected for processing (5)

docs/framework/react/guides/ssr.md
examples/react/tanstack-start/package.json
packages/react-form-nextjs/package.json
packages/react-form-remix/package.json
packages/react-form-start/package.json

✅ Files skipped from review due to trivial changes (1)

docs/framework/react/guides/ssr.md

🚧 Files skipped from review as they are similar to previous changes (2)

examples/react/tanstack-start/package.json
packages/react-form-start/package.json

📝 Walkthrough

Walkthrough

Updates server-function validation calls from .inputValidator(...) to .validator(...) in docs and source examples, and adjusts @tanstack/react-start package manifests and version constraints across the example and framework packages.

Changes

Validator rename and dependency updates

Layer / File(s)	Summary
Rename validator chain method in core and example code `packages/react-form-start/src/createServerValidate.tsx`, `examples/react/tanstack-start/src/utils/form.tsx`, `docs/framework/react/guides/ssr.md`	The server function chain method used for validating incoming request data is renamed from `.inputValidator(...)` to `.validator(...)`, with unchanged validation logic in each location.
Align react-start dependency ranges `examples/react/tanstack-start/package.json`, `packages/react-form-start/package.json`, `packages/react-form-nextjs/package.json`, `packages/react-form-remix/package.json`	`@tanstack/react-start` version constraints are bumped in the example and start package manifests, and removed from the Next.js and Remix manifests where it is no longer declared.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Suggested reviewers: tannerlinsley

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description covers the change, but it does not follow the required template and omits the checklist and release impact sections.	Add the required template sections: ## 🎯 Changes, ## ✅ Checklist, and ## 🚀 Release Impact, with the requested checkbox items filled out.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and accurately summarizes the main change: replacing deprecated inputValidator with validator.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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socket-security · 2026-07-02T14:29:25Z

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	@tanstack/react-start@1.168.27

View full report

coderabbitai · 2026-07-02T14:33:24Z

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Failed to replace (edit) comment. This is likely due to insufficient permissions or the comment being deleted.

Error details

{}

TanStack Start has deprecated createServerFn().inputValidator() in favour of .validator(). Update the react-form-start package, example, and SSR docs accordingly, and bump the @tanstack/react-start peer dependency to ^1.168.27 where the new API is available.

# Conflicts: # packages/react-form-nextjs/package.json # packages/react-form-remix/package.json # packages/react-form-start/package.json # pnpm-lock.yaml

nx-cloud · 2026-07-09T10:08:40Z

View your CI Pipeline Execution ↗ for commit 88bfc4a

Command	Status	Duration	Result
`nx affected --targets=test:sherif,test:knip,tes...`	✅ Succeeded	4m 46s	View ↗
`nx run-many --target=build --exclude=examples/**`	✅ Succeeded	42s	View ↗

☁️ Nx Cloud last updated this comment at 2026-07-09 10:14:23 UTC

pkg-pr-new · 2026-07-09T10:10:42Z

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commit: 88bfc4a

codecov-commenter · 2026-07-09T10:15:08Z

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.74%. Comparing base (6892ed0) to head (88bfc4a).
⚠️ Report is 252 commits behind head on main.
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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2230      +/-   ##
==========================================
- Coverage   90.35%   89.74%   -0.62%     
==========================================
  Files          38       65      +27     
  Lines        1752     3207    +1455     
  Branches      444      810     +366     
==========================================
+ Hits         1583     2878    +1295     
- Misses        149      295     +146     
- Partials       20       34      +14

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smorimoto force-pushed the fix/replace-inputvalidator-with-validator branch from 9c8f0d1 to f25ed02 Compare July 3, 2026 02:04

zgeoff mentioned this pull request Jul 8, 2026

spike: review form handling and pick a form library for the web rebuild zgeoff/vers#300

Closed

crutchcorn added 3 commits July 9, 2026 03:00

chore: fix pnpm lock

a729977

Merge branch 'main' into fix/replace-inputvalidator-with-validator

f877c72

# Conflicts: # packages/react-form-nextjs/package.json # packages/react-form-remix/package.json # packages/react-form-start/package.json # pnpm-lock.yaml

fix: remove errant peerdeps

88bfc4a

crutchcorn merged commit 42c866a into TanStack:main Jul 9, 2026
9 checks passed

crutchcorn mentioned this pull request Jul 9, 2026

chore: add new changesets for release #2236

Merged

smorimoto deleted the fix/replace-inputvalidator-with-validator branch July 9, 2026 10:56

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fix(react-form-start): replace deprecated inputValidator with validator#2230

fix(react-form-start): replace deprecated inputValidator with validator#2230
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