next-safe-action React Hooks

Import

// Standard hooks
import { useAction, useOptimisticAction } from "next-safe-action/hooks";

// Deprecated — use React's useActionState directly instead
import { useStateAction } from "next-safe-action/stateful-hooks";

useAction — Quick Start

"use client";

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

export function CreateUserForm() {
  const { execute, result, status, isExecuting, isPending } = useAction(createUser, {
    onSuccess: ({ data }) => {
      console.log("User created:", data);
    },
    onError: ({ error }) => {
      console.error("Failed:", error.serverError);
    },
  });

  return (
    <form onSubmit={(e) => {
      e.preventDefault();
      const formData = new FormData(e.currentTarget);
      execute({ name: formData.get("name") as string });
    }}>
      <input name="name" required />
      <button type="submit" disabled={isPending}>
        {isPending ? "Creating..." : "Create User"}
      </button>
      {result.serverError && <p className="error">{result.serverError}</p>}
      {result.data && <p className="success">Created: {result.data.id}</p>}
    </form>
  );
}

useOptimisticAction — Quick Start

"use client";

import { useOptimisticAction } from "next-safe-action/hooks";
import { toggleTodo } from "@/app/actions";

export function TodoItem({ todo }: { todo: Todo }) {
  const { execute, optimisticState } = useOptimisticAction(toggleTodo, {
    currentState: todo,
    updateFn: (state, input) => ({
      ...state,
      completed: !state.completed,
    }),
  });

  return (
    <label>
      <input
        type="checkbox"
        checked={optimisticState.completed}
        onChange={() => execute({ todoId: todo.id })}
      />
      {todo.title}
    </label>
  );
}

Return Value

Both useAction and useOptimisticAction return:

useOptimisticAction additionally returns: | optimisticState | State | The optimistically-updated state |

Supporting Docs

• execute vs executeAsync, result handling
• Optimistic updates with useOptimisticAction
• Status lifecycle and all callbacks

Anti-Patterns

// BAD: Using executeAsync without try/catch when navigation errors are possible
const handleClick = async () => {
  const result = await executeAsync({ id }); // Throws on redirect!
  showToast(result.data);
};

// GOOD: Wrap executeAsync in try/catch
const handleClick = async () => {
  try {
    const result = await executeAsync({ id });
    showToast(result.data);
  } catch (e) {
    // Navigation errors (redirect, notFound) are re-thrown
    // They'll be handled by Next.js — just let them propagate
    throw e;
  }
};