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

smorimoto · smorimoto · commit f25ed0290edf · 2026-07-03T11:04:49.000+09:00
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.
diff --git a/docs/framework/react/guides/ssr.md b/docs/framework/react/guides/ssr.md
@@ -58,7 +58,7 @@ const serverValidate = createServerValidate({
 export const handleForm = createServerFn({
   method: 'POST',
 })
-  .inputValidator((data: unknown) => {
+  .validator((data: unknown) => {
     if (!(data instanceof FormData)) {
       throw new Error('Invalid form data')
     }
diff --git a/examples/react/tanstack-start/package.json b/examples/react/tanstack-start/package.json
@@ -11,7 +11,7 @@
   "dependencies": {
     "@tanstack/react-form-start": "^1.33.0",
     "@tanstack/react-router": "^1.134.9",
-    "@tanstack/react-start": "^1.134.9",
+    "@tanstack/react-start": "^1.168.27",
     "@tanstack/react-store": "^0.11.0",
     "react": "19.1.0",
     "react-dom": "19.1.0"
diff --git a/examples/react/tanstack-start/src/utils/form.tsx b/examples/react/tanstack-start/src/utils/form.tsx
@@ -17,7 +17,7 @@ const serverValidate = createServerValidate({
 })
 
 export const handleForm = createServerFn({ method: 'POST' })
-  .inputValidator((data: unknown) => {
+  .validator((data: unknown) => {
     if (!(data instanceof FormData)) {
       throw new Error('Invalid form data')
     }
diff --git a/packages/react-form-start/package.json b/packages/react-form-start/package.json
@@ -52,7 +52,7 @@
     "devalue": "^5.3.2"
   },
   "devDependencies": {
-    "@tanstack/react-start": "^1.134.9",
+    "@tanstack/react-start": "^1.168.27",
     "@types/react": "~19.1.0",
     "@types/react-dom": "^19.0.3",
     "@vitejs/plugin-react": "^5.1.1",
@@ -62,7 +62,7 @@
     "vite": "^7.2.2"
   },
   "peerDependencies": {
-    "@tanstack/react-start": "^1.134.9",
+    "@tanstack/react-start": "^1.168.27",
     "react": "^17.0.0 || ^18.0.0 || ^19.0.0"
   },
   "peerDependenciesMeta": {
diff --git a/packages/react-form-start/src/createServerValidate.tsx b/packages/react-form-start/src/createServerValidate.tsx
@@ -50,7 +50,7 @@ interface CreateServerValidateOptions<
 }
 
 const serverFn = createServerFn({ method: 'POST' })
-  .inputValidator(
+  .validator(
     (data: { formData: unknown; info?: unknown; defaultOpts: unknown }) => {
       return data
     },
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml

Original file line number	Diff line number	Diff line change
`@@ -58,7 +58,7 @@ const serverValidate = createServerValidate({`
`58`	`58`	`export const handleForm = createServerFn({`
`59`	`59`	`method: 'POST',`
`60`	`60`	`})`
`61`		`- .inputValidator((data: unknown) => {`
	`61`	`+ .validator((data: unknown) => {`
`62`	`62`	`if (!(data instanceof FormData)) {`
`63`	`63`	`throw new Error('Invalid form data')`
`64`	`64`	`}`
Original file line number	Diff line number	Diff line change
`@@ -17,7 +17,7 @@ const serverValidate = createServerValidate({`
`17`	`17`	`})`
`18`	`18`
`19`	`19`	`export const handleForm = createServerFn({ method: 'POST' })`
`20`		`- .inputValidator((data: unknown) => {`
	`20`	`+ .validator((data: unknown) => {`
`21`	`21`	`if (!(data instanceof FormData)) {`
`22`	`22`	`throw new Error('Invalid form data')`
`23`	`23`	`}`
Original file line number	Diff line number	Diff line change
`@@ -50,7 +50,7 @@ interface CreateServerValidateOptions<`
`50`	`50`	`}`
`51`	`51`
`52`	`52`	`const serverFn = createServerFn({ method: 'POST' })`
`53`		`- .inputValidator(`
	`53`	`+ .validator(`
`54`	`54`	`(data: { formData: unknown; info?: unknown; defaultOpts: unknown }) => {`
`55`	`55`	`return data`
`56`	`56`	`},`