AppShell

A main application shell component that provides a layout structure with a collapsible sidebar navbar, banner support, and main content area.

Import

import { AppShell, AppPageShell } from '@flxui/uikit/business'

Basic Usage

Nav items are rendered as direct children of AppShell — NavMenuItem portals itself into the navbar internally, so there’s no separate portal wrapper to import or render.

import { AppShell, AppPageShell, NavMenuItem } from '@flxui/uikit/business'
 
function Demo() {
  return (
    <AppShell
      navbar={{
        logo: <img src="/logo.svg" alt="Logo" />,
        footer: {
          utilityActions: []
        }
      }}
    >
      <NavMenuItem label="Dashboard" href="/dashboard" />
      <NavMenuItem label="Settings" href="/settings" />
 
      <AppPageShell title="Dashboard">
        <p>Page content here</p>
      </AppPageShell>
    </AppShell>
  )
}

navbar.footer.utilityActions is required — pass an empty array if you don’t need footer utility icons yet.

With Banner

import { AppShell, AppPageShell } from '@flxui/uikit/business'
import { Alert } from '@flxui/uikit'
 
function Demo() {
  return (
    <AppShell
      banner={<Alert color="blue">New features available!</Alert>}
      navbar={{
        logo: <img src="/logo.svg" alt="Logo" />,
        footer: { utilityActions: [] }
      }}
    >
      <AppPageShell title="Home">Content</AppPageShell>
    </AppShell>
  )
}

NavMenuItem supports nested children via NavMenuSubItem, an icon, and a numeric badge. When the navbar is collapsed (rail mode), it automatically switches to an icon-only button with a tooltip and a small badge dot — no extra configuration needed.

import { AppShell, AppPageShell, NavMenuItem, NavMenuSubItem } from '@flxui/uikit/business'
import { IconHome, IconSettings } from '@tabler/icons-react'
 
function Demo() {
  return (
    <AppShell navbar={{ logo: <Logo />, footer: { utilityActions: [] } }}>
      <NavMenuItem label="Dashboard" href="/dashboard" icon={<IconHome size={16} />} />
      <NavMenuItem label="Settings" icon={<IconSettings size={16} />}>
        <NavMenuSubItem label="General" href="/settings/general" />
        <NavMenuSubItem label="Security" href="/settings/security" />
      </NavMenuItem>
 
      <AppPageShell title="Settings">{/* ... */}</AppPageShell>
    </AppShell>
  )
}

Custom router links

Both NavMenuItem and NavMenuSubItem accept a renderLink escape hatch for router-driven links (TanStack Router, React Router, Next’s Link) instead of the built-in anchor:

<NavMenuItem
  label="Dashboard"
  icon={<IconHome size={16} />}
  renderLink={(linkProps) => (
    <Link to="/dashboard" preload="intent" activeProps={{ 'data-active': true }} {...linkProps} />
  )}
/>

href is ignored when renderLink is provided.

Notifications and utility actions

The navbar footer area supports two independent, data-driven config objects — not JSX slots.

<AppShell
  navbar={{
    logo: <Logo />,
    notifications: {
      notifications: [
        {
          id: 'update-1',
          title: 'New version available',
          description: 'v0.9.0 adds dark mode improvements.',
          linkLabel: 'See changelog',
          href: '/changelog',
          dismissible: true
        }
      ],
      onDismiss: (notification) => console.log('dismissed', notification.id)
    },
    footer: {
      utilityActions: [
        { id: 'help', ariaLabel: 'Help', icon: <IconHelp size={16} />, href: '/help' },
        { id: 'settings', ariaLabel: 'Settings', icon: <IconSettings size={16} />, onClick: () => {} }
      ]
    }
  }}
>
  {/* ... */}
</AppShell>

AppSidenavUtilityAction also accepts a renderLink for router-driven footer links, following the same pattern as NavMenuItem.

Collapsed Logo

When the navbar collapses into rail mode, the header switches to a compact layout: the logo shrinks into a clickable brand area (still fires onLogoClick), and the collapse/expand toggle button takes its place next to it.

By default, navbar.logo is reused for the collapsed state too — if you don’t pass logoCollapsed, AppShell falls back to navbar.logo automatically. This works fine for a square icon-only mark, but a wide horizontal logo will usually look cramped in the narrow rail width. Pass a dedicated compact mark via logoCollapsed for a cleaner rail header:

<AppShell
  navbar={{
    logo: <img src="/logo-full.svg" alt="FlxUI" height={24} />,
    logoCollapsed: <img src="/logo-mark.svg" alt="FlxUI" height={20} />,
    footer: { utilityActions: [] }
  }}
>
  {/* ... */}
</AppShell>

If logoCollapsed resolves to nothing (e.g. navbar.logo is also unset), the clickable brand area is skipped entirely — only the expand toggle button renders in the rail header.

Collapse Events

import { AppShell } from '@flxui/uikit/business'
 
function Demo() {
  return (
    <AppShell
      navbar={{
        logo: <Logo />,
        footer: { utilityActions: [] },
        onCollapse: () => console.log('Navbar collapsed'),
        onExpand: () => console.log('Navbar expanded')
      }}
    >
      {/* content */}
    </AppShell>
  )
}

Collapse state can also be controlled externally via navbar.collapsed — when provided, AppShell no longer manages the collapsed/expanded state internally, and onCollapse/onExpand become the only way to react to the user’s toggle clicks.

AppShell Props

Prop	Type	Default	Description
`banner`	`ReactNode`	-	Banner displayed at the top
`navbar`	`object`	-	Navbar configuration object
`children`	`ReactNode`	-	Nav items + page content

Prop	Type	Default	Description
`navbar.width`	`number`	`240`	Width of the navbar in expanded state (px)
`navbar.logo`	`ReactNode`	-	Logo shown in the expanded navbar header
`navbar.logoCollapsed`	`ReactNode`	`navbar.logo`	Logo shown in the collapsed rail header. Falls back to `navbar.logo` if omitted — see Collapsed Logo below for when to override it
`navbar.collapsed`	`boolean`	-	Controlled collapsed state (omit for uncontrolled)
`navbar.headerLeftSection`	`ReactNode`	-	Left section of the navbar header
`navbar.aboveMenu`	`ReactNode`	-	Content rendered between the header and the nav menu (hidden when collapsed)
`navbar.notifications`	`object`	-	Sidebar announcement cards config (see below)
`navbar.footer`	`object`	-	Required. Footer utility actions config (see below)
`navbar.onLogoClick`	`() => void`	-	Callback when the logo is clicked
`navbar.onCollapse`	`() => void`	-	Callback fired when the user collapses the navbar
`navbar.onExpand`	`() => void`	-	Callback fired when the user expands the navbar

navbar.notifications

Prop	Type	Default	Description
`notificationsAriaLabel`	`string`	`'Announcements'`	Accessible label for the section
`notifications`	`AppSidenavNotification[]`	-	List of announcement cards
`onDismiss`	`(notification: AppSidenavNotification) => void`	-	Called when a card’s dismiss button is clicked

navbar.footer

Prop	Type	Default	Description
`utilitiesAriaLabel`	`string`	`'Sidebar utilities'`	Accessible label for the section
`utilityActions`	`AppSidenavUtilityAction[]`	-	Required. List of icon-button actions

Types

interface AppSidenavNotification {
  id: string
  title: string
  description: string
  href?: string
  linkLabel?: string
  icon?: ReactNode
  dismissible?: boolean
  onAction?: () => void
}
 
interface AppSidenavUtilityAction {
  id: string
  ariaLabel: string
  icon: ReactNode
  href?: string
  onClick?: () => void
  renderLink?: (linkProps: {
    className: string
    'aria-label': string
    onClick: (event: React.MouseEvent) => void
  }) => ReactNode
}

Sub-components

Component	Description
`NavMenuItem`	Navigation item. Portals itself into the navbar automatically — render it as a direct child of `AppShell`, no wrapper needed.
`NavMenuSubItem`	Nested sub-navigation item, used as a child of `NavMenuItem`

AppPageShell

Page-level shell component designed to work within AppShell. Provides a sticky header with title, breadcrumbs, subtitle, secondary nav, and back-button support.

Import

import { AppPageShell } from '@flxui/uikit/business'

Basic Usage

import { AppPageShell } from '@flxui/uikit/business'
 
function Demo() {
  return (
    <AppPageShell title="Page Title">
      <p>Page content goes here</p>
    </AppPageShell>
  )
}

With Back Button

Back-button configuration lives inside headerProps, not as top-level props:

import { AppPageShell } from '@flxui/uikit/business'
 
function Demo() {
  return (
    <AppPageShell title="Details" headerProps={{ withBack: true, onBackClick: () => window.history.back() }}>
      <p>Detail content</p>
    </AppPageShell>
  )
}

Breadcrumbs, subtitle, and secondary nav

These can be passed either as top-level props or nested inside headerProps (the headerProps version takes precedence if both are given):

<AppPageShell
  title="Database Console"
  breadcrumbs={<Breadcrumbs items={[{ label: 'Databases', href: '/db' }, { label: 'my-cluster' }]} />}
  subtitle="us-east-1 · Serverless"
  secondaryNav={<Tabs items={['Overview', 'Monitoring', 'Settings']} />}
>
  {/* ... */}
</AppPageShell>

Notification bell and header actions

<AppPageShell
  title="Dashboard"
  headerProps={{ notificationBell: { count: 3, onClick: () => {} } }}
  headerActions={<Button>New database</Button>}
>
  {/* ... */}
</AppPageShell>

Without a header

<AppPageShell withHeader={false}>{/* full-bleed content, no header at all */}</AppPageShell>

AppPageShell Props

Prop	Type	Default	Description
`maxWidth`	`string`	`'100%'`	Maximum width of the page content
`withHeader`	`boolean`	`true`	Whether to render the header at all
`title`	`ReactNode`	-	Page title
`breadcrumbs`	`ReactNode`	-	Breadcrumbs (fallback — prefer `headerProps.breadcrumbs`)
`subtitle`	`ReactNode`	-	Subtitle text (fallback — prefer `headerProps.subtitle`)
`secondaryNav`	`ReactNode`	-	Tabs/pills under the title (fallback — prefer `headerProps.secondaryNav`)
`children`	`ReactNode`	-	Page content
`headerActions`	`ReactNode`	-	Rendered in the header’s right section, after the notification bell
`footer`	`ReactNode`	-	Rendered below the page content
`wrapperProps`	`object`	-	Props forwarded to the outer wrapper
`bodyProps`	`object`	-	Props forwarded to the scrollable body element
`headerProps`	`object`	-	See below

headerProps

Prop	Type	Default	Description
`withBack`	`boolean`	-	Show the back button
`onBackClick`	`() => void`	-	Back button click handler
`breadcrumbs`	`ReactNode`	-	Overrides the top-level `breadcrumbs` prop
`subtitle`	`ReactNode`	-	Overrides the top-level `subtitle` prop
`secondaryNav`	`ReactNode`	-	Overrides the top-level `secondaryNav` prop
`notificationBell`	`object`	-	Config for an auto-rendered notification bell, placed before `headerActions`

The header is always sticky in AppPageShell — there’s no stickyHeader toggle to opt out of it.

Getting Started DateTimePicker

AppShell

Import

Basic Usage

With Banner

Navigation Items

Custom router links

Notifications and utility actions

Collapsed Logo

Collapse Events

AppShell Props

Navbar Configuration

Types

Sub-components

AppPageShell

Import

Basic Usage

With Back Button

Notification bell and header actions

Without a header

AppPageShell Props