React Hooks

Context-Action provides React hooks for action dispatching and store management.

Essential Hooks

These are the core hooks you'll use most frequently.

Action Hooks

createActionContext<T>()

Factory function that creates all action-related hooks.

import { createActionContext } from '@context-action/react';

interface UserActions {
  updateProfile: { name: string; email: string };
  logout: void;
}

const { 
  Provider: UserActionProvider,
  useActionDispatch: useUserAction,
  useActionHandler: useUserActionHandler
} = createActionContext<UserActions>('UserActions');

useActionDispatch()

Primary hook for dispatching actions to handlers.

function UserComponent() {
  const dispatch = useUserAction();
  
  const handleUpdate = () => {
    dispatch('updateProfile', { 
      name: 'John Doe', 
      email: 'john@example.com' 
    });
  };
  
  return <button onClick={handleUpdate}>Update Profile</button>;
}

useActionHandler()

Primary hook for registering action handlers.

function UserComponent() {
  const dispatch = useUserAction();
  
  // Register handler for updateProfile action
  useUserActionHandler('updateProfile', useCallback(async (payload) => {
    try {
      await updateUserProfile(payload);
      console.log('Profile updated successfully');
    } catch (error) {
      console.error('Failed to update profile:', error);
    }
  }, []));
  
  return <div>User Profile Component</div>;
}

Store Hooks

createDeclarativeStorePattern<T>()

Factory function that creates all store-related hooks.

import { createDeclarativeStorePattern } from '@context-action/react';

const {
  Provider: UserStoreProvider,
  useStore: useUserStore,
  useStoreManager: useUserStoreManager
} = createDeclarativeStorePattern('User', {
  profile: { initialValue: { id: '', name: '', email: '' } },
  settings: { initialValue: { theme: 'light', notifications: true } }
});

useStoreValue<T>(store)

Primary hook for subscribing to store changes.

import { useStoreValue } from '@context-action/react';

function UserProfile() {
  const profileStore = useUserStore('profile');
  const profile = useStoreValue(profileStore);
  
  return (
    <div>
      <h1>{profile.name}</h1>
      <p>{profile.email}</p>
    </div>
  );
}

useStore(name)

Primary hook for accessing stores by name.

function UserSettings() {
  const profileStore = useUserStore('profile');
  const settingsStore = useUserStore('settings');
  
  const profile = useStoreValue(profileStore);
  const settings = useStoreValue(settingsStore);
  
  return (
    <div>
      <p>User: {profile.name}</p>
      <p>Theme: {settings.theme}</p>
    </div>
  );
}

Utility Hooks

Additional hooks for advanced scenarios.

Store Management

useStoreManager()

Hook for updating stores programmatically.

function UserManager() {
  const { updateStore, resetStore } = useUserStoreManager();
  
  const updateUserName = (newName: string) => {
    updateStore('profile', prevProfile => ({
      ...prevProfile,
      name: newName
    }));
  };
  
  const resetProfile = () => {
    resetStore('profile');
  };
  
  return (
    <div>
      <button onClick={() => updateUserName('New Name')}>
        Update Name
      </button>
      <button onClick={resetProfile}>
        Reset Profile
      </button>
    </div>
  );
}

Advanced Action Hooks

useActionDispatchWithResult()

Hook that provides both dispatch and result collection capabilities.

function AdvancedUserComponent() {
  const { 
    dispatch, 
    dispatchWithResult, 
    abortAll 
  } = useActionDispatchWithResult();
  
  const handleAsyncAction = async () => {
    try {
      const result = await dispatchWithResult('updateProfile', {
        name: 'John',
        email: 'john@example.com'
      });
      
      if (result.success) {
        console.log('All handlers completed successfully');
      } else {
        console.error('Some handlers failed:', result.errors);
      }
    } catch (error) {
      console.error('Action failed:', error);
    }
  };
  
  return (
    <div>
      <button onClick={handleAsyncAction}>
        Update with Result
      </button>
      <button onClick={abortAll}>
        Abort All Actions
      </button>
    </div>
  );
}

Usage Guidelines

Best Practices

1. Use useCallback for handlers:

useUserActionHandler('updateProfile', useCallback(async (payload) => {
  // Handler logic
}, [])); // Empty deps for stable handler

2. Combine patterns when needed:

function App() {
  return (
    <UserStoreProvider>
      <UserActionProvider>
        <UserComponent />
      </UserActionProvider>
    </UserStoreProvider>
  );
}

3. Type-safe store access:

const profileStore = useUserStore('profile'); // Type-safe
const profile = useStoreValue(profileStore);   // Type-safe

Performance Tips

• Store subscriptions only re-render on actual value changes
• Use specific store subscriptions rather than subscribing to entire state
• Handler registration is optimized for minimal re-renders
• Action dispatching is memoized automatically