feat: automatically infer values from schema

README.md

@@ -19,8 +19,37 @@
 ## Install
 
 Install your preferred validation library alongside `@hookform/resolvers`.
-
-    npm install @hookform/resolvers
+
+    npm install @hookform/resolvers # npm
+    yarn add @hookform/resolvers # yarn
+    pnpm install @hookform/resolvers # pnpm
+    bun install @hookform/resolvers # bun
+
+<details>
+  <summary>Resolver Comparison</summary>
+
+| resolver  | Infer values <br /> from schema | [criteriaMode](https://react-hook-form.com/docs/useform#criteriaMode) |
+|---|---|---|
+| AJV  | ❌  | `firstError | all` |
+| Arktype |  ✅ | `firstError` |
+| class-validator  | ✅  | `firstError | all` |
+| computed-types  | ✅  | `firstError` |
+| Effect  | ✅  | `firstError | all` |
+| fluentvalidation-ts  | ❌  | `firstError` |
+| io-ts  | ✅  | `firstError` |
+| joi |  ❌ | `firstError | all` |
+| Nope  | ❌  | `firstError` |
+| Standard Schema  | ✅  | `firstError | all` |
+| Superstruct  | ✅  | `firstError` |
+| typanion  | ✅  | `firstError` |
+| typebox  | ✅  | `firstError | all` |
+| typeschema  | ❌  | `firstError | all` |
+| valibot  | ✅  | `firstError | all` |
+| vest  | ❌  | `firstError | all` |
+| vine  | ✅  | `firstError | all` |
+| yup  | ✅  | `firstError | all` |
+| zod  | ✅ | `firstError | all` |
+</details>
 
 ## Links
 

ajv/src/ajv.ts

@@ -58,6 +58,26 @@ const parseErrorSchema = (
   return parsedErrors;
 };
 
+/**
+ * Creates a resolver for react-hook-form using Ajv schema validation
+ * @param {Schema} schema - The Ajv schema to validate against
+ * @param {Object} schemaOptions - Additional schema validation options
+ * @param {Object} resolverOptions - Additional resolver configuration
+ * @param {string} [resolverOptions.mode='async'] - Validation mode
+ * @returns {Resolver<Schema>} A resolver function compatible with react-hook-form
+ * @example
+ * const schema = ajv.compile({
+ *   type: 'object',
+ *   properties: {
+ *     name: { type: 'string' },
+ *     age: { type: 'number' }
+ *   }
+ * });
+ *
+ * useForm({
+ *   resolver: ajvResolver(schema)
+ * });
+ */
 export const ajvResolver: Resolver =
   (schema, schemaOptions, resolverOptions = {}) =>
   async (values, _, options) => {

arktype/src/__tests__/Form.tsx

@@ -12,16 +12,16 @@ const schema = type({
 
 type FormData = typeof schema.infer & { unusedProperty: string };
 
-interface Props {
-  onSubmit: (data: FormData) => void;
-}
-
-function TestComponent({ onSubmit }: Props) {
+function TestComponent({
+  onSubmit,
+}: {
+  onSubmit: (data: typeof schema.infer) => void;
+}) {
   const {
     register,
     handleSubmit,
     formState: { errors },
-  } = useForm<FormData>({
+  } = useForm({
     resolver: arktypeResolver(schema), // Useful to check TypeScript regressions
   });
 
@@ -54,3 +54,29 @@ test("form's validation with arkType and TypeScript's integration", async () =>
   ).toBeInTheDocument();
   expect(handleSubmit).not.toHaveBeenCalled();
 });
+
+export function TestComponentManualType({
+  onSubmit,
+}: {
+  onSubmit: (data: FormData) => void;
+}) {
+  const {
+    register,
+    handleSubmit,
+    formState: { errors },
+  } = useForm<typeof schema.infer, undefined, FormData>({
+    resolver: arktypeResolver(schema), // Useful to check TypeScript regressions
+  });
+
+  return (
+    <form onSubmit={handleSubmit(onSubmit)}>
+      <input {...register('username')} />
+      {errors.username && <span role="alert">{errors.username.message}</span>}
+
+      <input {...register('password')} />
+      {errors.password && <span role="alert">{errors.password.message}</span>}
+
+      <button type="submit">submit</button>
+    </form>
+  );
+}

arktype/src/__tests__/__fixtures__/data.ts

@@ -43,7 +43,7 @@ export const invalidData = {
   birthYear: 'birthYear',
   like: [{ id: 'z' }],
   url: 'abc',
-};
+} as any as typeof schema.infer;
 
 export const fields: Record<InternalFieldName, Field['_f']> = {
   username: {

arktype/src/arktype.ts

@@ -1,9 +1,8 @@
 import { toNestErrors, validateFieldsNatively } from '@hookform/resolvers';
-import { ArkErrors } from 'arktype';
-import { FieldError, FieldErrors } from 'react-hook-form';
-import type { Resolver } from './types';
+import { ArkErrors, Type } from 'arktype';
+import { FieldError, FieldErrors, Resolver } from 'react-hook-form';
 
-const parseErrorSchema = (arkErrors: ArkErrors): Record<string, FieldError> => {
+function parseErrorSchema(arkErrors: ArkErrors): Record<string, FieldError> {
   const errors = [...arkErrors];
   const fieldsErrors: Record<string, FieldError> = {};
 
@@ -19,11 +18,31 @@ const parseErrorSchema = (arkErrors: ArkErrors): Record<string, FieldError> => {
   }
 
   return fieldsErrors;
-};
-
-export const arktypeResolver: Resolver =
-  (schema, _schemaOptions, resolverOptions = {}) =>
-  (values, _, options) => {
+}
+
+/**
+ * Creates a resolver for react-hook-form using Arktype schema validation
+ * @param {Schema} schema - The Arktype schema to validate against
+ * @param {Object} resolverOptions - Additional resolver configuration
+ * @param {string} [resolverOptions.mode='raw'] - Return the raw input values rather than the parsed values
+ * @returns {Resolver<Schema['inferOut']>} A resolver function compatible with react-hook-form
+ * @example
+ * const schema = type({
+ *   username: 'string>2'
+ * });
+ *
+ * useForm({
+ *   resolver: arktypeResolver(schema)
+ * });
+ */
+export function arktypeResolver<Schema extends Type<any, any>>(
+  schema: Schema,
+  _schemaOptions?: never,
+  resolverOptions: {
+    raw?: boolean;
+  } = {},
+): Resolver<Schema['inferOut']> {
+  return (values, _, options) => {
     const out = schema(values);
 
     if (out instanceof ArkErrors) {
@@ -40,3 +59,4 @@ export const arktypeResolver: Resolver =
       values: resolverOptions.raw ? Object.assign({}, values) : out,
     };
   };
+}

arktype/src/index.ts

@@ -1,2 +1 @@
 export * from './arktype';
-export * from './types';