[v2] Improve `formOptions` types by LeCarbonator · Pull Request #2348 · TanStack/form · GitHub

🎯 Changes

Centralizes the form options so that not every adapter has to implement a AppFormOptions shim.
Makes looseSchema accept optional properties
Makes formOptions schema variants error out when no schema is provided

✅ Checklist

I have followed the steps in the Contributing guide.
I have tested this code locally with pnpm test:pr.

🚀 Release Impact

This change affects published code, and I have generated a changeset.
This change is docs/CI/dev-only (no release).

Summary by CodeRabbit

New Features
- Added typed submission callbacks and component-aware form options.
- Added Standard Schema-aware form option types, including strict and loose schema variants.
- Added clearer validation requirements and support for optional default values with loose schemas.
- Added a reusable validator type for improved public API typing.
Refactor
- Consolidated framework adapters around shared form option APIs.
- Removed legacy framework-specific app form option APIs and exports.
- Improved type inference across React, Angular, Vue, Solid, Svelte, Lit, and Preact integrations.

this helps reduce display value. We had it quite high at around 30KB for every usage of options.

Related to #2347

📝 Walkthrough

Walkthrough

Form core adds component-aware, Standard Schema-aware form option types and typed validator contracts. Framework adapters update their FormOptions signatures, replace local option APIs with FormOptionsApi, and infer component mappings from shared options. Tests cover schema inference and runtime behavior.

Changes

Form options consolidation

Layer / File(s)	Summary
Core public option contracts packages/form-core/src/FormApi/FormApi.public.ts, packages/form-core/src/utils.public.ts, packages/form-core/src/validation.public.ts, packages/form-core/src/ssr.public.ts	Form core adds component-aware FormOptions, Standard Schema constraints, FormSubmitFn, and CreatedValidator.
Core integration and validation coverage packages/form-core/src/FormApi/FormApi.lib.ts, packages/form-core/src/defaultOptions.public.ts, packages/form-core/src/ssr.lib.ts, packages/form-core/tests/*, .changeset/forty-eyes-fall.md	Internal APIs and server validation use the expanded FormOptions type. Tests cover schema inference, optional defaults, and runtime option preservation.
Adapter form option propagation packages/angular-form/src/, packages/lit-form/src/, packages/preact-form/src/, packages/react-form/src/, packages/react-form-nextjs/src/, packages/react-form-start/src/, packages/solid-form/src/, packages/svelte-form/src/, packages/vue-form/src/*	Adapter initialization, hooks, controllers, and server-validation APIs pass unknown as the fourth FormOptions parameter.
Shared adapter option APIs and component inference packages/preact-form/src/AppForm/, packages/preact-form/src/PreactForm/formType.public.ts, packages/react-form/src/AppForm/, packages/react-form/src/ReactForm/formType.public.ts, packages/solid-form/src/AppForm/, packages/solid-form/src/formType.public.ts, packages/svelte-form/src/AppForm/, packages/svelte-form/src/formType.public.ts, packages/vue-form/src/AppForm/*, packages/vue-form/src/VueForm/formType.public.ts	Adapters use core FormOptionsApi and derive component mappings from FormOptions with framework-specific defaults.

Estimated code review effort: 4 (Complex) | ~45 minutes

Merge Risk: 🟡 Moderate · up to 2c0c9

This change can cause existing consumers to fail TypeScript compilation because previously valid form option type usages now require an additional parameter. The PR should not merge until the parameter defaults and compatibility tests are added.

🚥 Pre-merge checks | ✅ 4 | ❌ 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 (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the central formOptions typing improvements.
Description check	✅ Passed	The description includes all template sections, explains the changes, confirms testing, and records the changeset.
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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🚀 Changeset Version Preview

9 package(s) bumped directly, 4 bumped as dependents.

🟨 Minor bumps

Package	Version	Reason
@tanstack/angular-form	2.0.0-alpha.1 → 2.0.0-alpha.2	Changeset
@tanstack/form-core	2.0.0-alpha.1 → 2.0.0-alpha.2	Changeset
@tanstack/preact-form	2.0.0-alpha.1 → 2.0.0-alpha.2	Changeset
@tanstack/react-form	2.0.0-alpha.1 → 2.0.0-alpha.2	Changeset
@tanstack/solid-form	2.0.0-alpha.1 → 2.0.0-alpha.2	Changeset
@tanstack/svelte-form	2.0.0-alpha.1 → 2.0.0-alpha.2	Changeset
@tanstack/vue-form	2.0.0-alpha.1 → 2.0.0-alpha.2	Changeset
@tanstack/react-form-nextjs	2.0.0-alpha.1 → 2.0.0-alpha.2	Dependent
@tanstack/react-form-start	2.0.0-alpha.1 → 2.0.0-alpha.2	Dependent

🟩 Patch bumps

Package	Version	Reason
@tanstack/form-devtools	1.0.0-alpha.1 → 1.0.0-alpha.2	Changeset
@tanstack/lit-form	2.0.0-alpha.1 → 2.0.0-alpha.2	Changeset
@tanstack/react-form-devtools	1.0.0-alpha.1 → 1.0.0-alpha.2	Dependent
@tanstack/solid-form-devtools	1.0.0-alpha.1 → 1.0.0-alpha.2	Dependent

Actionable comments posted: 1

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Inline comments:
In `@packages/form-core/src/FormApi/FormApi.public.ts`:
- Around line 256-262: Set TComponents = unknown in FormOptions and the three
affected helper type declarations in packages/form-core/src/utils.public.ts,
preserving existing variance and constraints. Add type tests in
packages/form-core/tests/validation.test-d.ts covering their previous arities,
including no-argument applications where applicable; no direct change is
required at the listed test site beyond adding those compatibility assertions.

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📥 Commits

Reviewing files that changed from the base of the PR and between 63c9ea3 and 2c0c9d6.

📒 Files selected for processing (57)

.changeset/forty-eyes-fall.md
packages/angular-form/src/form-type.ts
packages/angular-form/src/inject-form.ts
packages/form-core/src/FormApi/FormApi.lib.ts
packages/form-core/src/FormApi/FormApi.public.ts
packages/form-core/src/defaultOptions.public.ts
packages/form-core/src/ssr.lib.ts
packages/form-core/src/ssr.public.ts
packages/form-core/src/utils.public.ts
packages/form-core/src/validation.public.ts
packages/form-core/tests/serverValidate.test-d.ts
packages/form-core/tests/validation-public.test.ts
packages/form-core/tests/validation.test-d.ts
packages/lit-form/src/get-form-type.ts
packages/lit-form/src/tanstack-form-controller.ts
packages/preact-form/src/AppForm/appFormOptions.public.ts
packages/preact-form/src/AppForm/createFormHook.public.ts
packages/preact-form/src/AppForm/createFormHookTypes.public.ts
packages/preact-form/src/AppForm/initializeAppForm.lib.ts
packages/preact-form/src/PreactForm/PreactFormApi.lib.tsx
packages/preact-form/src/PreactForm/formType.public.ts
packages/preact-form/src/PreactForm/useForm.public.ts
packages/preact-form/src/index.ts
packages/react-form-nextjs/src/index.ts
packages/react-form-start/src/index.ts
packages/react-form/src/AppForm/appFormOptions.public.ts
packages/react-form/src/AppForm/createFormHook.public.ts
packages/react-form/src/AppForm/createFormHookTypes.public.ts
packages/react-form/src/AppForm/initializeAppForm.lib.ts
packages/react-form/src/ReactForm/ReactFormApi.lib.tsx
packages/react-form/src/ReactForm/formType.public.ts
packages/react-form/src/ReactForm/useForm.public.ts
packages/react-form/src/index.ts
packages/solid-form/src/AppForm/appFormOptions.public.ts
packages/solid-form/src/AppForm/createFormHook.public.ts
packages/solid-form/src/AppForm/createFormHookTypes.public.ts
packages/solid-form/src/AppForm/initializeAppForm.lib.ts
packages/solid-form/src/SolidFormApi.lib.ts
packages/solid-form/src/createForm.public.ts
packages/solid-form/src/formType.public.ts
packages/solid-form/src/index.ts
packages/svelte-form/src/AppForm/appFormOptions.public.ts
packages/svelte-form/src/AppForm/createFormHook.public.ts
packages/svelte-form/src/AppForm/createFormHookTypes.public.ts
packages/svelte-form/src/AppForm/initializeAppForm.lib.ts
packages/svelte-form/src/createForm.public.ts
packages/svelte-form/src/createForm.svelte.ts
packages/svelte-form/src/formType.public.ts
packages/svelte-form/src/index.ts
packages/vue-form/src/AppForm/appFormOptions.public.ts
packages/vue-form/src/AppForm/createFormHook.public.ts
packages/vue-form/src/AppForm/createFormHookTypes.public.ts
packages/vue-form/src/AppForm/initializeAppForm.lib.ts
packages/vue-form/src/VueForm/VueFormApi.lib.ts
packages/vue-form/src/VueForm/formType.public.ts
packages/vue-form/src/VueForm/useForm.public.ts
packages/vue-form/src/index.ts

💤 Files with no reviewable changes (10)

packages/solid-form/src/index.ts
packages/solid-form/src/AppForm/appFormOptions.public.ts
packages/react-form/src/index.ts
packages/preact-form/src/AppForm/appFormOptions.public.ts
packages/svelte-form/src/AppForm/appFormOptions.public.ts
packages/vue-form/src/index.ts
packages/preact-form/src/index.ts
packages/vue-form/src/AppForm/appFormOptions.public.ts
packages/react-form/src/AppForm/appFormOptions.public.ts
packages/svelte-form/src/index.ts

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Related to #2347

LeCarbonator added 6 commits August 19, 2026 07:19

refactor: move some typing into aliases

c3aca57

this helps reduce display value. We had it quite high at around 30KB for every usage of options.

fix: make looseSchema accept optional props

9abf6ba

Related to #2347

refactor: centralize adapter-specific app form options

6d07320

fix: Only allow schema options if schema exists

d1f0713

chore: add changeset

dfe516f

chore: amend changeset

2c0c9d6

coderabbitai Bot reviewed Aug 19, 2026

View reviewed changes

Comment thread packages/form-core/src/FormApi/FormApi.public.ts

LeCarbonator merged commit 4e37c69 into alpha Aug 19, 2026
11 of 12 checks passed

LeCarbonator deleted the form-options-types branch August 19, 2026 09:59

github-actions Bot mentioned this pull request Aug 19, 2026

ci: Version Packages (alpha) #2340

Merged

coderabbitai Bot mentioned this pull request Aug 19, 2026

[v2] Fix formOptions typing #2349

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[v2] Improve `formOptions` types by LeCarbonator · Pull Request #2348 · TanStack/form · GitHub

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[v2] Improve formOptions types - #2348

[v2] Improve formOptions types#2348
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[v2] Improve `formOptions` types by LeCarbonator · Pull Request #2348 · TanStack/form · GitHub

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[v2] Improve formOptions types - #2348

[v2] Improve formOptions types#2348LeCarbonator merged 6 commits intoalphaTanStack/form:alphafrom form-options-typesTanStack/form:form-options-typesCopy head branch name to clipboard

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