safe-action-forms

next-safe-action Form Integration

Options

Approach	When to Use
useAction + native form	Simple forms, no complex validation UI, programmatic triggers
useStateAction + <form action={formAction}>	Forms with state tracking, need prevResult access, full callbacks
useHookFormAction (RHF adapter)	Complex forms with field-level errors, validation on change/blur
useHookFormOptimisticAction	RHF forms with optimistic UI updates
useOptimisticStateAction	Instant UI where overlapping writes must be queued and accumulate (see the hooks skill)

Quick Start — useStateAction Form

"use client";

import { useStateAction } from "next-safe-action/hooks";
import { submitContact } from "@/app/actions";

export function ContactForm() {
  const { formAction, result, isPending, hasSucceeded } = useStateAction(submitContact, {
    onSuccess: () => toast.success("Message sent!"),
  });

  return (
    <form action={formAction}>
      <input name="name" required />
      <input name="email" type="email" required />
      <textarea name="message" required />

      {result.validationErrors?.email && (
        <p>{result.validationErrors.email._errors?.[0]}</p>
      )}
      {result.serverError && <p>{result.serverError}</p>}
      {hasSucceeded && <p>Message sent!</p>}

      <button type="submit" disabled={isPending}>
        {isPending ? "Sending..." : "Send"}
      </button>
    </form>
  );
}

Note: useStateAction requires the server action to be defined with .stateAction() instead of .action(), and <form action={formAction}> passes raw FormData, so its input schema must parse FormData (e.g. zfd.formData({...}) from zod-form-data). See the hooks skill for the full decision table on when to use useAction vs useStateAction.

Quick Start — Native Form

"use client";

import { useAction } from "next-safe-action/hooks";
import { submitContact } from "@/app/actions";

export function ContactForm() {
  const { execute, result, isPending } = useAction(submitContact);

  return (
    <form
      onSubmit={(e) => {
        e.preventDefault();
        const fd = new FormData(e.currentTarget);
        execute({
          name: fd.get("name") as string,
          email: fd.get("email") as string,
          message: fd.get("message") as string,
        });
      }}
    >
      <input name="name" required />
      <input name="email" type="email" required />
      <textarea name="message" required />

      {result.validationErrors && (
        <p>{result.validationErrors.email?._errors?.[0]}</p>
      )}
      {result.serverError && <p>{result.serverError}</p>}
      {result.data && <p>Message sent!</p>}

      <button type="submit" disabled={isPending}>
        {isPending ? "Sending..." : "Send"}
      </button>
    </form>
  );
}

Quick Start — React Hook Form Adapter

"use client";

import { useHookFormAction } from "@next-safe-action/adapter-react-hook-form/hooks";
import { zodResolver } from "@hookform/resolvers/zod";
import { z } from "zod";
import { submitContact } from "@/app/actions";

const schema = z.object({
  name: z.string().min(1, "Name is required"),
  email: z.string().email("Invalid email"),
  message: z.string().min(10, "Message must be at least 10 characters"),
});

export function ContactForm() {
  const { form, handleSubmitWithAction, action } = useHookFormAction(
    submitContact,
    zodResolver(schema),
    {
      actionProps: {
        onSuccess: () => toast.success("Message sent!"),
      },
    }
  );

  return (
    <form onSubmit={handleSubmitWithAction}>
      <input {...form.register("name")} />
      {form.formState.errors.name && <p>{form.formState.errors.name.message}</p>}

      <input {...form.register("email")} />
      {form.formState.errors.email && <p>{form.formState.errors.email.message}</p>}

      <textarea {...form.register("message")} />
      {form.formState.errors.message && <p>{form.formState.errors.message.message}</p>}

      {action.result.serverError && <p>{action.result.serverError}</p>}

      <button type="submit" disabled={action.isPending}>
        {action.isPending ? "Sending..." : "Send"}
      </button>
    </form>
  );
}

Supporting Docs

• Native form submission patterns
• React Hook Form adapter in depth
• File uploads

Entry Points

Package	Entry Point	Exports
@next-safe-action/adapter-react-hook-form	Default	mapToHookFormErrors, types
@next-safe-action/adapter-react-hook-form/hooks	Hooks	useHookFormAction, useHookFormOptimisticAction, useHookFormActionErrorMapper