# Notification Channels block

> Notification preferences settings with tabbed channel matrix table for Email, Slack, and In-app

Notification settings grouping events under Projects, Messages, Reports, and System tabs, each a table with per-row Email/Slack/In-app checkboxes. Uses shadcn Tabs (line), Table, Checkbox. For alert preferences and channel opt-in.

- Type: Pro block
- Category: [Settings](https://web.dev.reui.io/blocks/application/settings.md)
- Page: https://web.dev.reui.io/blocks/application/settings/settings-11
- MCP: `get_block("settings-11")`
- Built with: Checkbox, Table, Tabs
- Installs with a ReUI Pro or Ultimate license; setup: https://web.dev.reui.io/docs/license-setup

## Best for

An event by channel checkbox matrix with Email, Slack and In-app columns, split over 4 line tabs from Projects to System

## Agent notes

- Every `Checkbox` is uncontrolled with `defaultChecked` from `NOTIFICATION_TABS` and has no handler, so wire each cell to your preferences API
- A new channel needs a `NotificationItem` field, a `CHANNELS` entry and a slot in `checks`, since `NotificationTableRow` pairs them by index

## When not to use

- Notification choices that are one tab of a wider account area with profile and billing: use [Account Settings](https://web.dev.reui.io/blocks/application/settings/settings-7.md) (`get_block("settings-7")`)
- A single delivery level per channel, from everything to muted, not a checkbox per event: use [Notification Delivery](https://web.dev.reui.io/blocks/application/settings/settings-12.md) (`get_block("settings-12")`)

## Install

```bash
npx shadcn@latest add @reui/settings-11
```

## About Settings blocks

### When to use

- Preference pages of labeled rows, each row carrying its own switch, select, input or button
- Integration pages that pick, connect or configure third party apps, webhook routes and API keys
- Account, security, notification channel and role permission policies

### When not to use

- A new record to fill in and submit, such as an invoice, a product or a member invite: use the [Form blocks](https://web.dev.reui.io/blocks/application/form.md)
- A billing page with usage counters and an invoice table, or a referral rewards page: use the [Profile blocks](https://web.dev.reui.io/blocks/application/profile.md)
- The sidebar navigation that wraps every page of a product, the settings page included: use the [App Shell blocks](https://web.dev.reui.io/blocks/application/app-shell.md)

### Agent notes

- Each page.tsx centers the root in a padded `min-h-svh` wrapper and each root caps its own max width; remove both inside your settings route
- Nothing is saved and no block calls an API, so wire every button and control, including any `useState` or `defaultChecked` value, to your settings API

Every ReUI item has a twin like this one; the index is https://web.dev.reui.io/llms.txt. Agents with the ReUI MCP (https://web.dev.reui.io/docs/mcp) get the same guidance from the getters named above.