📄 tanstack/form/latest/docs/reference/classes/formapi

File: formapi.md | Updated: 11/15/2025

Source: https://tanstack.com/form/latest/docs/reference/classes/formapi



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FormApi

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Class: FormApi<TFormData, TOnMount, TOnChange, TOnChangeAsync, TOnBlur, TOnBlurAsync, TOnSubmit, TOnSubmitAsync, TOnDynamic, TOnDynamicAsync, TOnServer, TSubmitMeta>
=====================================================================================================================================================================

Defined in: packages/form-core/src/FormApi.ts:880

A class representing the Form API. It handles the logic and interactions with the form state.

Normally, you will not need to create a new FormApi instance directly. Instead, you will use a framework hook/function like useForm or createForm to create a new instance for you that uses your framework's reactivity model. However, if you need to create a new instance manually, you can do so by calling the new FormApi constructor.

Type Parameters
---------------

• TFormData

• TOnMount extends undefined | FormValidateOrFn<TFormData>

• TOnChange extends undefined | FormValidateOrFn<TFormData>

• TOnChangeAsync extends undefined | FormAsyncValidateOrFn<TFormData>

• TOnBlur extends undefined | FormValidateOrFn<TFormData>

• TOnBlurAsync extends undefined | FormAsyncValidateOrFn<TFormData>

• TOnSubmit extends undefined | FormValidateOrFn<TFormData>

• TOnSubmitAsync extends undefined | FormAsyncValidateOrFn<TFormData>

• TOnDynamic extends undefined | FormValidateOrFn<TFormData>

• TOnDynamicAsync extends undefined | FormAsyncValidateOrFn<TFormData>

• TOnServer extends undefined | FormAsyncValidateOrFn<TFormData>

• TSubmitMeta = never

Implements
----------

  • FieldManipulator<TFormData, TSubmitMeta>

Constructors
------------ ### new FormApi()

ts

new FormApi<TFormData, TOnMount, TOnChange, TOnChangeAsync, TOnBlur, TOnBlurAsync, TOnSubmit, TOnSubmitAsync, TOnDynamic, TOnDynamicAsync, TOnServer, TSubmitMeta>(opts?): FormApi<TFormData, TOnMount, TOnChange, TOnChangeAsync, TOnBlur, TOnBlurAsync, TOnSubmit, TOnSubmitAsync, TOnDynamic, TOnDynamicAsync, TOnServer, TSubmitMeta>


new FormApi<TFormData, TOnMount, TOnChange, TOnChangeAsync, TOnBlur, TOnBlurAsync, TOnSubmit, TOnSubmitAsync, TOnDynamic, TOnDynamicAsync, TOnServer, TSubmitMeta>(opts?): FormApi<TFormData, TOnMount, TOnChange, TOnChangeAsync, TOnBlur, TOnBlurAsync, TOnSubmit, TOnSubmitAsync, TOnDynamic, TOnDynamicAsync, TOnServer, TSubmitMeta>

Defined in: packages/form-core/src/FormApi.ts:991

Constructs a new FormApi instance with the given form options.

#### Parameters ##### opts?

FormOptions <TFormData, TOnMount, TOnChange, TOnChangeAsync, TOnBlur, TOnBlurAsync, TOnSubmit, TOnSubmitAsync, TOnDynamic, TOnDynamicAsync, TOnServer, TSubmitMeta>

#### Returns

FormApi <TFormData, TOnMount, TOnChange, TOnChangeAsync, TOnBlur, TOnBlurAsync, TOnSubmit, TOnSubmitAsync, TOnDynamic, TOnDynamicAsync, TOnServer, TSubmitMeta>

Properties
---------- ### baseStore

ts

baseStore: Store<BaseFormState<TFormData, TOnMount, TOnChange, TOnChangeAsync, TOnBlur, TOnBlurAsync, TOnSubmit, TOnSubmitAsync, TOnDynamic, TOnDynamicAsync, TOnServer>>;


baseStore: Store<BaseFormState<TFormData, TOnMount, TOnChange, TOnChangeAsync, TOnBlur, TOnBlurAsync, TOnSubmit, TOnSubmitAsync, TOnDynamic, TOnDynamicAsync, TOnServer>>;

Defined in: packages/form-core/src/FormApi.ts:912

### fieldInfo

ts

fieldInfo: Record<DeepKeys<TFormData>, FieldInfo<TFormData>>;


fieldInfo: Record<DeepKeys<TFormData>, FieldInfo<TFormData>>;

Defined in: packages/form-core/src/FormApi.ts:960

A record of field information for each field in the form.

### fieldMetaDerived

ts

fieldMetaDerived: Derived<Partial<Record<DeepKeys<TFormData>, AnyFieldMeta>>>;


fieldMetaDerived: Derived<Partial<Record<DeepKeys<TFormData>, AnyFieldMeta>>>;

Defined in: packages/form-core/src/FormApi.ts:927

### options

ts

options: FormOptions<TFormData, TOnMount, TOnChange, TOnChangeAsync, TOnBlur, TOnBlurAsync, TOnSubmit, TOnSubmitAsync, TOnDynamic, TOnDynamicAsync, TOnServer, TSubmitMeta> = {};


options: FormOptions<TFormData, TOnMount, TOnChange, TOnChangeAsync, TOnBlur, TOnBlurAsync, TOnSubmit, TOnSubmitAsync, TOnDynamic, TOnDynamicAsync, TOnServer, TSubmitMeta> = {};

Defined in: packages/form-core/src/FormApi.ts:898

The options for the form.

### store

ts

store: Derived<FormState<TFormData, TOnMount, TOnChange, TOnChangeAsync, TOnBlur, TOnBlurAsync, TOnSubmit, TOnSubmitAsync, TOnDynamic, TOnDynamicAsync, TOnServer>>;


store: Derived<FormState<TFormData, TOnMount, TOnChange, TOnChangeAsync, TOnBlur, TOnBlurAsync, TOnSubmit, TOnSubmitAsync, TOnDynamic, TOnDynamicAsync, TOnServer>>;

Defined in: packages/form-core/src/FormApi.ts:942

Accessors
--------- ### formId #### Get Signature

ts

get formId(): string


get formId(): string

Defined in: packages/form-core/src/FormApi.ts:1351

##### Returns

string

### state #### Get Signature

ts

get state(): FormState<TFormData, TOnMount, TOnChange, TOnChangeAsync, TOnBlur, TOnBlurAsync, TOnSubmit, TOnSubmitAsync, TOnDynamic, TOnDynamicAsync, TOnServer>


get state(): FormState<TFormData, TOnMount, TOnChange, TOnChangeAsync, TOnBlur, TOnBlurAsync, TOnSubmit, TOnSubmitAsync, TOnDynamic, TOnDynamicAsync, TOnServer>

Defined in: packages/form-core/src/FormApi.ts:962

##### Returns

FormState <TFormData, TOnMount, TOnChange, TOnChangeAsync, TOnBlur, TOnBlurAsync, TOnSubmit, TOnSubmitAsync, TOnDynamic, TOnDynamicAsync, TOnServer>

Methods
------- ### clearFieldValues()

ts

clearFieldValues<TField>(field, options?): void


clearFieldValues<TField>(field, options?): void

Defined in: packages/form-core/src/FormApi.ts:2493

Clear all values within an array field.

#### Type Parameters

• TField extends string

#### Parameters ##### field

TField

##### options?

UpdateMetaOptions

#### Returns

void

#### Implementation of

ts

FieldManipulator.clearFieldValues


FieldManipulator.clearFieldValues

### deleteField()

ts

deleteField<TField>(field): void


deleteField<TField>(field): void

Defined in: packages/form-core/src/FormApi.ts:2285

#### Type Parameters

• TField extends string

#### Parameters ##### field

TField

#### Returns

void

#### Implementation of

ts

FieldManipulator.deleteField


FieldManipulator.deleteField

### getAllErrors()

ts

getAllErrors(): object


getAllErrors(): object

Defined in: packages/form-core/src/FormApi.ts:2608

Returns form and field level errors

#### Returns

object

##### fields

ts

fields: Record<DeepKeys<TFormData>, {
  errorMap: ValidationErrorMap;
  errors: unknown[];
}>;


fields: Record<DeepKeys<TFormData>, {
  errorMap: ValidationErrorMap;
  errors: unknown[];
}>;

##### form

ts

form: object;


form: object;

###### form.errorMap

ts

errorMap: ValidationErrorMap<UnwrapFormValidateOrFn<TOnMount>, UnwrapFormValidateOrFn<TOnChange>, UnwrapFormAsyncValidateOrFn<TOnChangeAsync>, UnwrapFormValidateOrFn<TOnBlur>, UnwrapFormAsyncValidateOrFn<TOnBlurAsync>, UnwrapFormValidateOrFn<TOnSubmit>, UnwrapFormAsyncValidateOrFn<TOnSubmitAsync>, UnwrapFormValidateOrFn<TOnDynamic>, UnwrapFormAsyncValidateOrFn<TOnDynamicAsync>, UnwrapFormAsyncValidateOrFn<TOnServer>>;


errorMap: ValidationErrorMap<UnwrapFormValidateOrFn<TOnMount>, UnwrapFormValidateOrFn<TOnChange>, UnwrapFormAsyncValidateOrFn<TOnChangeAsync>, UnwrapFormValidateOrFn<TOnBlur>, UnwrapFormAsyncValidateOrFn<TOnBlurAsync>, UnwrapFormValidateOrFn<TOnSubmit>, UnwrapFormAsyncValidateOrFn<TOnSubmitAsync>, UnwrapFormValidateOrFn<TOnDynamic>, UnwrapFormAsyncValidateOrFn<TOnDynamicAsync>, UnwrapFormAsyncValidateOrFn<TOnServer>>;

###### form.errors

ts

errors: (
  | UnwrapFormValidateOrFn<TOnMount>
  | UnwrapFormValidateOrFn<TOnChange>
  | UnwrapFormAsyncValidateOrFn<TOnChangeAsync>
  | UnwrapFormValidateOrFn<TOnBlur>
  | UnwrapFormAsyncValidateOrFn<TOnBlurAsync>
  | UnwrapFormValidateOrFn<TOnSubmit>
  | UnwrapFormAsyncValidateOrFn<TOnSubmitAsync>
  | UnwrapFormValidateOrFn<TOnDynamic>
  | UnwrapFormAsyncValidateOrFn<TOnDynamicAsync>
  | UnwrapFormAsyncValidateOrFn<TOnServer>)[];


errors: (
  | UnwrapFormValidateOrFn<TOnMount>
  | UnwrapFormValidateOrFn<TOnChange>
  | UnwrapFormAsyncValidateOrFn<TOnChangeAsync>
  | UnwrapFormValidateOrFn<TOnBlur>
  | UnwrapFormAsyncValidateOrFn<TOnBlurAsync>
  | UnwrapFormValidateOrFn<TOnSubmit>
  | UnwrapFormAsyncValidateOrFn<TOnSubmitAsync>
  | UnwrapFormValidateOrFn<TOnDynamic>
  | UnwrapFormAsyncValidateOrFn<TOnDynamicAsync>
  | UnwrapFormAsyncValidateOrFn<TOnServer>)[];

### getFieldInfo()

ts

getFieldInfo<TField>(field): FieldInfo<TFormData>


getFieldInfo<TField>(field): FieldInfo<TFormData>

Defined in: packages/form-core/src/FormApi.ts:2188

Gets the field info of the specified field.

#### Type Parameters

• TField extends string

#### Parameters ##### field

TField

#### Returns

FieldInfo <TFormData>

### getFieldMeta()

ts

getFieldMeta<TField>(field): undefined | AnyFieldMeta


getFieldMeta<TField>(field): undefined | AnyFieldMeta

Defined in: packages/form-core/src/FormApi.ts:2179

Gets the metadata of the specified field.

#### Type Parameters

• TField extends string

#### Parameters ##### field

TField

#### Returns

undefined | AnyFieldMeta

#### Implementation of

ts

FieldManipulator.getFieldMeta


FieldManipulator.getFieldMeta

### getFieldValue()

ts

getFieldValue<TField>(field): DeepValue<TFormData, TField>


getFieldValue<TField>(field): DeepValue<TFormData, TField>

Defined in: packages/form-core/src/FormApi.ts:2172

Gets the value of the specified field.

#### Type Parameters

• TField extends string

#### Parameters ##### field

TField

#### Returns

DeepValue <TFormData, TField>

#### Implementation of

ts

FieldManipulator.getFieldValue


FieldManipulator.getFieldValue

### handleSubmit() #### Call Signature

ts

handleSubmit(): Promise<void>


handleSubmit(): Promise<void>

Defined in: packages/form-core/src/FormApi.ts:2024

Handles the form submission, performs validation, and calls the appropriate onSubmit or onSubmitInvalid callbacks.

##### Returns

Promise<void>

##### Implementation of

ts

FieldManipulator.handleSubmit


FieldManipulator.handleSubmit

#### Call Signature

ts

handleSubmit(submitMeta): Promise<void>


handleSubmit(submitMeta): Promise<void>

Defined in: packages/form-core/src/FormApi.ts:2025

Handles the form submission, performs validation, and calls the appropriate onSubmit or onSubmitInvalid callbacks.

##### Parameters ###### submitMeta

TSubmitMeta

##### Returns

Promise<void>

##### Implementation of

ts

FieldManipulator.handleSubmit


FieldManipulator.handleSubmit

### insertFieldValue()

ts

insertFieldValue<TField>(
   field, 
   index, 
   value, 
options?): Promise<void>


insertFieldValue<TField>(
   field, 
   index, 
   value, 
options?): Promise<void>

Defined in: packages/form-core/src/FormApi.ts:2323

#### Type Parameters

• TField extends string

#### Parameters ##### field

TField

##### index

number

##### value

DeepValue <TFormData, TField> extends any[] ? any[] & DeepValue <TFormData, TField>[number] : never

##### options?

UpdateMetaOptions

#### Returns

Promise<void>

#### Implementation of

ts

FieldManipulator.insertFieldValue


FieldManipulator.insertFieldValue

### mount()

ts

mount(): () => void


mount(): () => void

Defined in: packages/form-core/src/FormApi.ts:1380

#### Returns

Function

##### Returns

void

### moveFieldValues()

ts

moveFieldValues<TField>(
   field, 
   index1, 
   index2, 
   options?): void


moveFieldValues<TField>(
   field, 
   index1, 
   index2, 
   options?): void

Defined in: packages/form-core/src/FormApi.ts:2461

Moves the value at the first specified index to the second specified index within an array field.

#### Type Parameters

• TField extends string

#### Parameters ##### field

TField

##### index1

number

##### index2

number

##### options?

UpdateMetaOptions

#### Returns

void

#### Implementation of

ts

FieldManipulator.moveFieldValues


FieldManipulator.moveFieldValues

### parseValuesWithSchema()

ts

parseValuesWithSchema(schema): 
  | undefined
  | {
  fields: Record<string, StandardSchemaV1Issue[]>;
  form: Record<string, StandardSchemaV1Issue[]>;
}


parseValuesWithSchema(schema): 
  | undefined
  | {
  fields: Record<string, StandardSchemaV1Issue[]>;
  form: Record<string, StandardSchemaV1Issue[]>;
}

Defined in: packages/form-core/src/FormApi.ts:2672

Parses the form's values with a given standard schema and returns issues (if any). This method does NOT set any internal errors.

#### Parameters ##### schema

StandardSchemaV1 <TFormData, unknown>

The standard schema to parse the form values with.

#### Returns

| undefined | { fields: Record<string, StandardSchemaV1Issue []>; form: Record<string, StandardSchemaV1Issue []>; }

### parseValuesWithSchemaAsync()

ts

parseValuesWithSchemaAsync(schema): Promise<
  | undefined
  | {
  fields: Record<string, StandardSchemaV1Issue[]>;
  form: Record<string, StandardSchemaV1Issue[]>;
}>


parseValuesWithSchemaAsync(schema): Promise<
  | undefined
  | {
  fields: Record<string, StandardSchemaV1Issue[]>;
  form: Record<string, StandardSchemaV1Issue[]>;
}>

Defined in: packages/form-core/src/FormApi.ts:2684

Parses the form's values with a given standard schema and returns issues (if any). This method does NOT set any internal errors.

#### Parameters ##### schema

StandardSchemaV1 <TFormData, unknown>

The standard schema to parse the form values with.

#### Returns

Promise< | undefined | { fields: Record<string, StandardSchemaV1Issue []>; form: Record<string, StandardSchemaV1Issue []>; }>

### pushFieldValue()

ts

pushFieldValue<TField>(
   field, 
   value, 
   options?): void


pushFieldValue<TField>(
   field, 
   value, 
   options?): void

Defined in: packages/form-core/src/FormApi.ts:2309

Pushes a value into an array field.

#### Type Parameters

• TField extends string

#### Parameters ##### field

TField

##### value

DeepValue <TFormData, TField> extends any[] ? any[] & DeepValue <TFormData, TField>[number] : never

##### options?

UpdateMetaOptions

#### Returns

void

#### Implementation of

ts

FieldManipulator.pushFieldValue


FieldManipulator.pushFieldValue

### removeFieldValue()

ts

removeFieldValue<TField>(
   field, 
   index, 
options?): Promise<void>


removeFieldValue<TField>(
   field, 
   index, 
options?): Promise<void>

Defined in: packages/form-core/src/FormApi.ts:2389

Removes a value from an array field at the specified index.

#### Type Parameters

• TField extends string

#### Parameters ##### field

TField

##### index

number

##### options?

UpdateMetaOptions

#### Returns

Promise<void>

#### Implementation of

ts

FieldManipulator.removeFieldValue


FieldManipulator.removeFieldValue

### replaceFieldValue()

ts

replaceFieldValue<TField>(
   field, 
   index, 
   value, 
options?): Promise<void>


replaceFieldValue<TField>(
   field, 
   index, 
   value, 
options?): Promise<void>

Defined in: packages/form-core/src/FormApi.ts:2360

Replaces a value into an array field at the specified index.

#### Type Parameters

• TField extends string

#### Parameters ##### field

TField

##### index

number

##### value

DeepValue <TFormData, TField> extends any[] ? any[] & DeepValue <TFormData, TField>[number] : never

##### options?

UpdateMetaOptions

#### Returns

Promise<void>

#### Implementation of

ts

FieldManipulator.replaceFieldValue


FieldManipulator.replaceFieldValue

### reset()

ts

reset(values?, opts?): void


reset(values?, opts?): void

Defined in: packages/form-core/src/FormApi.ts:1491

Resets the form state to the default values. If values are provided, the form will be reset to those values instead and the default values will be updated.

#### Parameters ##### values?

TFormData

Optional values to reset the form to.

##### opts?

Optional options to control the reset behavior.

###### keepDefaultValues?

boolean

#### Returns

void

### resetField()

ts

resetField<TField>(field): void


resetField<TField>(field): void

Defined in: packages/form-core/src/FormApi.ts:2526

Resets the field value and meta to default state

#### Type Parameters

• TField extends string

#### Parameters ##### field

TField

#### Returns

void

#### Implementation of

ts

FieldManipulator.resetField


FieldManipulator.resetField

### resetFieldMeta()

ts

resetFieldMeta<TField>(fieldMeta): Partial<Record<TField, AnyFieldMeta>>


resetFieldMeta<TField>(fieldMeta): Partial<Record<TField, AnyFieldMeta>>

Defined in: packages/form-core/src/FormApi.ts:2229

resets every field's meta

#### Type Parameters

• TField extends string

#### Parameters ##### fieldMeta

Partial<Record<TField, AnyFieldMeta >>

#### Returns

Partial<Record<TField, AnyFieldMeta >>

### setErrorMap()

ts

setErrorMap(errorMap): void


setErrorMap(errorMap): void

Defined in: packages/form-core/src/FormApi.ts:2544

Updates the form's errorMap

#### Parameters ##### errorMap

FormValidationErrorMap<TFormData, UnwrapFormValidateOrFn <TOnMount>, UnwrapFormValidateOrFn <TOnChange>, UnwrapFormAsyncValidateOrFn <TOnChangeAsync>, UnwrapFormValidateOrFn <TOnBlur>, UnwrapFormAsyncValidateOrFn <TOnBlurAsync>, UnwrapFormValidateOrFn <TOnSubmit>, UnwrapFormAsyncValidateOrFn <TOnSubmitAsync>, UnwrapFormValidateOrFn <TOnDynamic>, UnwrapFormAsyncValidateOrFn <TOnDynamicAsync>, UnwrapFormAsyncValidateOrFn <TOnServer>>

#### Returns

void

### setFieldMeta()

ts

setFieldMeta<TField>(field, updater): void


setFieldMeta<TField>(field, updater): void

Defined in: packages/form-core/src/FormApi.ts:2208

Updates the metadata of the specified field.

#### Type Parameters

• TField extends string

#### Parameters ##### field

TField

##### updater

Updater <AnyFieldMetaBase >

#### Returns

void

#### Implementation of

ts

FieldManipulator.setFieldMeta


FieldManipulator.setFieldMeta

### setFieldValue()

ts

setFieldValue<TField>(
   field, 
   updater, 
   opts?): void


setFieldValue<TField>(
   field, 
   updater, 
   opts?): void

Defined in: packages/form-core/src/FormApi.ts:2245

Sets the value of the specified field and optionally updates the touched state.

#### Type Parameters

• TField extends string

#### Parameters ##### field

TField

##### updater

Updater <DeepValue <TFormData, TField>>

##### opts?

UpdateMetaOptions

#### Returns

void

#### Implementation of

ts

FieldManipulator.setFieldValue


FieldManipulator.setFieldValue

### swapFieldValues()

ts

swapFieldValues<TField>(
   field, 
   index1, 
   index2, 
   options?): void


swapFieldValues<TField>(
   field, 
   index1, 
   index2, 
   options?): void

Defined in: packages/form-core/src/FormApi.ts:2429

Swaps the values at the specified indices within an array field.

#### Type Parameters

• TField extends string

#### Parameters ##### field

TField

##### index1

number

##### index2

number

##### options?

UpdateMetaOptions

#### Returns

void

#### Implementation of

ts

FieldManipulator.swapFieldValues


FieldManipulator.swapFieldValues

### update()

ts

update(options?): void


update(options?): void

Defined in: packages/form-core/src/FormApi.ts:1415

Updates the form options and form state.

#### Parameters ##### options?

FormOptions <TFormData, TOnMount, TOnChange, TOnChangeAsync, TOnBlur, TOnBlurAsync, TOnSubmit, TOnSubmitAsync, TOnDynamic, TOnDynamicAsync, TOnServer, TSubmitMeta>

#### Returns

void

### validateAllFields()

ts

validateAllFields(cause): Promise<unknown[]>


validateAllFields(cause): Promise<unknown[]>

Defined in: packages/form-core/src/FormApi.ts:1517

Validates all fields using the correct handlers for a given validation cause.

#### Parameters ##### cause

ValidationCause

#### Returns

Promise<unknown[]>

#### Implementation of

ts

FieldManipulator.validateAllFields


FieldManipulator.validateAllFields

### validateArrayFieldsStartingFrom()

ts

validateArrayFieldsStartingFrom<TField>(
   field, 
   index, 
cause): Promise<unknown[]>


validateArrayFieldsStartingFrom<TField>(
   field, 
   index, 
cause): Promise<unknown[]>

Defined in: packages/form-core/src/FormApi.ts:1547

Validates the children of a specified array in the form starting from a given index until the end using the correct handlers for a given validation type.

#### Type Parameters

• TField extends string

#### Parameters ##### field

TField

##### index

number

##### cause

ValidationCause

#### Returns

Promise<unknown[]>

#### Implementation of

ts

FieldManipulator.validateArrayFieldsStartingFrom


FieldManipulator.validateArrayFieldsStartingFrom

### validateField()

ts

validateField<TField>(field, cause): unknown[] | Promise<unknown[]>


validateField<TField>(field, cause): unknown[] | Promise<unknown[]>

Defined in: packages/form-core/src/FormApi.ts:1588

Validates a specified field in the form using the correct handlers for a given validation type.

#### Type Parameters

• TField extends string

#### Parameters ##### field

TField

##### cause

ValidationCause

#### Returns

unknown[] | Promise<unknown[]>

#### Implementation of

ts

FieldManipulator.validateField


FieldManipulator.validateField

Edit on GitHub

Classes / FieldApi

Functions / formOptions

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