react-alert

name	react-alert
description	Display user-facing alerts, notifications, and feedback messages using toast notifications from the sonner library. Use this skill whenever the user asks to show an alert, notification, success message, error message, warning, or any kind of user feedback popup.

This skill defines the standard approach for displaying alerts, notifications, and user feedback in this project. All alerts MUST use toast notifications from the sonner library — never native browser alerts.

Setup

The sonner package is already installed in this project. The <Toaster> provider is already mounted in src/App.tsx:

import { Toaster } from 'sonner';

// Inside the App component JSX:
<Toaster position="bottom-right" richColors />

No additional setup is needed. Just import toast from sonner and call it.

Rules

1. Always use toast from sonner for any user-facing alert, notification, or feedback message.
2. Never use window.alert() — use toast() or toast.error() instead.
3. Never use window.confirm() — use the Modal component (see react-modal skill) for confirmation dialogs, with toast for the resulting success/error feedback.
4. Never use window.prompt() — use the Modal component with a form input instead.
5. Never use console.log() as a substitute for user feedback — if the user should see it, use a toast.
6. Never create custom alert/notification components (banners, snackbars, inline alerts) for transient feedback. The toast system already handles this with consistent styling and auto-dismiss behavior.

Toast Types

Use the appropriate toast variant to match the nature of the message:

import { toast } from 'sonner';

// Success — operation completed successfully
toast.success('Profile updated successfully!');

// Error — something went wrong
toast.error('Failed to save changes. Please try again.');

// Warning — caution or important notice
toast.warning('Your session will expire in 5 minutes.');

// Info — neutral informational message
toast.info('New updates are available.');

// Default — generic notification (no icon/color)
toast('Something happened.');

// Loading — for async operations with follow-up
toast.loading('Saving changes...');

Usage Patterns

Basic feedback after an action

import { toast } from 'sonner';

const handleSave = async () => {
  try {
    await saveData();
    toast.success('Changes saved successfully!');
  } catch (error) {
    toast.error(error.message || 'Failed to save changes.');
  }
};

Promise-based toast (loading → success/error)

For async operations where you want to show a loading state that resolves:

import { toast } from 'sonner';

const handleDelete = () => {
  toast.promise(deleteItem(id), {
    loading: 'Deleting item...',
    success: 'Item deleted successfully!',
    error: 'Failed to delete item.',
  });
};

Toast with action button

When the user might want to undo or take a follow-up action:

import { toast } from 'sonner';

toast('Item archived.', {
  action: {
    label: 'Undo',
    onClick: () => restoreItem(id),
  },
});

Toast with custom duration

Default auto-dismiss is usually fine, but you can customize:

import { toast } from 'sonner';

// Stay longer for important messages (duration in ms)
toast.warning('Unsaved changes will be lost.', { duration: 8000 });

// Persistent toast that requires manual dismiss
toast.error('Connection lost. Check your internet.', { duration: Infinity });

Toast with description

For messages that need additional context:

import { toast } from 'sonner';

toast.success('User invited', {
  description: 'An invitation email has been sent to [e-mail].',
});

Message Guidelines

• Keep toast messages short and clear (one sentence).
• Use past tense for completed actions: "Profile updated successfully!" not "Profile has been updated."
• Use imperative or present tense for errors and instructions: "Failed to save. Please try again."
• Don't include technical details in user-facing messages — log those to console.error() separately.
• Always provide a fallback message when the error object might not have a .message:

  toast.error(error.message || 'An unexpected error occurred.');
  

Existing Conventions

This project already uses toast from sonner in several pages. Follow the same pattern:

• Success on completed action: toast.success('Login successful! Welcome back.')
• Error with message fallback: toast.error(error.message || 'Login failed. Please try again.')
• Callbacks from nauth-react components: Pass onSuccess / onError handlers that call toast.success() / toast.error().