feat: RAC SideNav

packages/dev/s2-docs/pages/react-aria/RoutedSideNav.tsx

@@ -0,0 +1,17 @@
+'use client';
+import {RouterProvider} from 'react-aria-components';
+import React, {ReactNode, useState} from 'react';
+
+export function RoutedSideNav(props: {
+  children: ({selectedRoute}: {selectedRoute: string}) => ReactNode;
+  defaultSelectedRoute: string;
+}) {
+  let {children} = props;
+  let [selectedRoute, setSelectedRoute] = useState<string>(props.defaultSelectedRoute);
+
+  let updateSelection = (href: string) => {
+    setSelectedRoute(href);
+  };
+
+  return <RouterProvider navigate={updateSelection}>{children({selectedRoute})}</RouterProvider>;
+}

packages/dev/s2-docs/pages/react-aria/SideNav.mdx

@@ -0,0 +1,204 @@
+import {Layout} from '../../src/Layout';
+export default Layout;
+
+import docs from 'docs:react-aria-components';
+import '../../tailwind/tailwind.css';
+import {InlineAlert, Heading, Content} from '@react-spectrum/s2';
+
+export const tags = ['navigation', 'nav', 'sidebar'];
+export const version = 'alpha';
+export const description = 'A navigation component that displays a nested, hierarchical set of links, with support for keyboard navigation and a current route indicator.';
+
+# SideNav
+
+<PageDescription>{docs.exports.SideNav.description}</PageDescription>
+
+<ExampleSwitcher>
+  ```tsx render docs={docs.exports.SideNav} links={docs.links} props={[]} type="vanilla" files={["starters/docs/src/SideNav.tsx", "starters/docs/src/SideNav.css", "./RoutedSideNav.tsx"]}
+  "use client";
+  import {SideNav, SideNavItem} from 'vanilla-starter/SideNav';
+  import {RoutedSideNav} from './RoutedSideNav';
+
+  <RoutedSideNav defaultSelectedRoute="/photos">
+    {({selectedRoute}) => (
+      <SideNav aria-label="Files" selectedRoute={selectedRoute} defaultExpandedKeys={['files']}>
+        <SideNavItem id="home" href="/home" title="Home" />
+        <SideNavItem id="files" href="/files" title="Files">
+          <SideNavItem id="photos" href="/photos" title="Photos" />
+          <SideNavItem id="videos" href="/videos" title="Videos" />
+        </SideNavItem>
+        <SideNavItem id="shared" href="/shared" title="Shared" />
+      </SideNav>
+    )}
+  </RoutedSideNav>
+  ```
+
+  ```tsx render docs={docs.exports.SideNav} links={docs.links} props={[]} type="tailwind" files={["starters/tailwind/src/SideNav.tsx", "./RoutedSideNav.tsx"]}
+  "use client";
+  import {SideNav, SideNavItem} from 'tailwind-starter/SideNav';
+  import {RoutedSideNav} from './RoutedSideNav';
+
+  <RoutedSideNav defaultSelectedRoute="/photos">
+    {({selectedRoute}) => (
+      <SideNav aria-label="Files" selectedRoute={selectedRoute} defaultExpandedKeys={['files']}>
+        <SideNavItem id="home" href="/home" title="Home" />
+        <SideNavItem id="files" href="/files" title="Files">
+          <SideNavItem id="photos" href="/photos" title="Photos" />
+          <SideNavItem id="videos" href="/videos" title="Videos" />
+        </SideNavItem>
+        <SideNavItem id="shared" href="/shared" title="Shared" />
+      </SideNav>
+    )}
+  </RoutedSideNav>
+  ```
+
+</ExampleSwitcher>
+
+<InlineAlert variant="notice">
+  <Heading>Accessibility</Heading>
+  <Content>`SideNav` renders as a tree so keyboard users can navigate and expand the hierarchy. When it acts as the main navigation for a page, place it inside a [navigation landmark](https://www.w3.org/WAI/ARIA/apg/patterns/landmarks/examples/navigation.html): wrap the `SideNav` in a `<nav>` element with an `aria-label` so assistive technology users can quickly find it.</Content>
+</InlineAlert>
+
+## Content
+
+`SideNav` follows the [Collection Components API](collections?component=SideNav), accepting both static and dynamic collections. The example above shows a static collection. This example shows a dynamic collection, passing a list of objects to the `items` prop and a function to render the children.
+
+```tsx render files={["./RoutedSideNav.tsx"]}
+"use client";
+import {SideNav, SideNavItem} from 'vanilla-starter/SideNav';
+import {RoutedSideNav} from './RoutedSideNav';
+
+function Example() {
+  let items = [
+    {id: 'overview', url: '/overview', label: 'Overview'},
+    {id: 'reports', url: '/reports', label: 'Reports'},
+    {id: 'settings', url: '/settings', label: 'Settings'}
+  ];
+
+  return (
+    <RoutedSideNav defaultSelectedRoute="/reports">
+      {({selectedRoute}) => (
+        /*- begin highlight -*/
+        <SideNav aria-label="Sections" items={items} selectedRoute={selectedRoute}>
+          {item => <SideNavItem href={item.url} title={item.label} />}
+        </SideNav>
+        /*- end highlight -*/
+      )}
+    </RoutedSideNav>
+  );
+}
+```
+
+## Current route
+
+Each `SideNavItem` accepts an `href`. Set the `selectedRoute` prop on the `SideNav` to the current page's path, and the item whose `href` matches is marked with `aria-current="page"` (and a `data-current` attribute for styling).
+
+Combine `SideNav` with a client side router by wrapping your app in a [RouterProvider](routing.html) so that activating a link updates the route. Then set `selectedRoute`. In this example the router navigation is stored in local state to show the current route updating as you activate links.
+
+```tsx render
+"use client";
+import {SideNav, SideNavItem} from 'vanilla-starter/SideNav';
+import {RouterProvider} from 'react-aria-components';
+import {useState} from 'react';
+
+function Example() {
+  let [route, setRoute] = useState('/inbox');
+  return (
+    /*- begin highlight -*/
+    <RouterProvider navigate={setRoute}>
+      <SideNav aria-label="Mail" selectedRoute={route}>
+        <SideNavItem href="/inbox" title="Inbox" />
+        <SideNavItem href="/drafts" title="Drafts" />
+        <SideNavItem href="/sent" title="Sent" />
+      </SideNav>
+    </RouterProvider>
+    /*- end highlight -*/
+  );
+}
+```
+
+## Sections
+
+Use `SideNavSection` to group related items, with an optional `SideNavHeader` to label each group.
+
+```tsx render files={["./RoutedSideNav.tsx"]}
+"use client";
+import {SideNav, SideNavItem, SideNavSection, SideNavHeader} from 'vanilla-starter/SideNav';
+import {RoutedSideNav} from './RoutedSideNav';
+
+<RoutedSideNav defaultSelectedRoute="/projects/apollo">
+  {({selectedRoute}) => (
+    <SideNav aria-label="Workspace" selectedRoute={selectedRoute}>
+      {/*- begin highlight -*/}
+      <SideNavSection>
+        <SideNavHeader>Personal</SideNavHeader>
+        <SideNavItem href="/home" title="Home" />
+        <SideNavItem href="/starred" title="Starred" />
+      </SideNavSection>
+      {/*- end highlight -*/}
+      <SideNavSection>
+        <SideNavHeader>Projects</SideNavHeader>
+        <SideNavItem href="/projects/apollo" title="Apollo" />
+        <SideNavItem href="/projects/gemini" title="Gemini" />
+      </SideNavSection>
+    </SideNav>
+  )}
+</RoutedSideNav>
+```
+
+## Disabled
+
+Set the `isDisabled` prop on a `SideNavItem` to disable it. Disabled items cannot be navigated to or focused.
+
+```tsx render files={["./RoutedSideNav.tsx"]}
+"use client";
+import {SideNav, SideNavItem} from 'vanilla-starter/SideNav';
+import {RoutedSideNav} from './RoutedSideNav';
+
+<RoutedSideNav defaultSelectedRoute="/home">
+  {({selectedRoute}) => (
+    <SideNav aria-label="Files" selectedRoute={selectedRoute}>
+      <SideNavItem href="/home" title="Home" />
+      {/*- begin highlight -*/}
+      <SideNavItem href="/archive" title="Archive" isDisabled />
+      {/*- end highlight -*/}
+      <SideNavItem href="/trash" title="Trash" />
+    </SideNav>
+  )}
+</RoutedSideNav>
+```
+
+## API
+
+```tsx links={{SideNav: '#sidenav', SideNavItem: '#sidenavitem', SideNavItemContent: '#sidenavitemcontent', SideNavSection: '#sidenavsection', SideNavHeader: '#sidenavheader', Link: 'Link'}}
+<SideNav>
+  <SideNavSection>
+    <SideNavHeader />
+    <SideNavItem>
+      <SideNavItemContent>
+        <Link />
+      </SideNavItemContent>
+    </SideNavItem>
+  </SideNavSection>
+</SideNav>
+```
+
+### SideNav
+
+<PropTable component={docs.exports.SideNav} links={docs.links} showDescription />
+
+### SideNavItem
+
+<PropTable component={docs.exports.SideNavItem} links={docs.links} showDescription />
+
+### SideNavItemContent
+
+<PropTable component={docs.exports.SideNavItemContent} links={docs.links} showDescription />
+
+### SideNavSection
+
+<PropTable component={docs.exports.SideNavSection} links={docs.links} showDescription />
+
+### SideNavHeader
+
+<PropTable component={docs.exports.SideNavHeader} links={docs.links} showDescription />

packages/dev/s2-docs/pages/react-aria/router.tsx

@@ -0,0 +1,37 @@
+'use client';
+import React, {createContext, ReactNode, useContext, useState} from 'react';
+
+// A tiny in-memory router that mirrors the parts of the `react-router` API used
+// to integrate with React Aria. In a real app, `MemoryRouter`, `useNavigate`, and
+// `useLocation` would come from the `react-router` package — the wiring above is
+// identical.
+
+interface Location {
+  pathname: string;
+}
+
+interface RouterContextValue {
+  location: Location;
+  navigate: (pathname: string) => void;
+}
+
+const RouterContext = createContext<RouterContextValue>({
+  location: {pathname: '/'},
+  navigate: () => {}
+});
+
+export function MemoryRouter(props: {initialEntries?: string[]; children: ReactNode}) {
+  let {initialEntries = ['/'], children} = props;
+  let [location, setLocation] = useState<Location>({pathname: initialEntries[0]});
+  let navigate = (pathname: string) => setLocation({pathname});
+
+  return <RouterContext.Provider value={{location, navigate}}>{children}</RouterContext.Provider>;
+}
+
+export function useLocation(): Location {
+  return useContext(RouterContext).location;
+}
+
+export function useNavigate(): (pathname: string) => void {
+  return useContext(RouterContext).navigate;
+}

packages/react-aria-components/exports/SideNav.ts

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2026 Adobe. All rights reserved.
+ * This file is licensed to you under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License. You may obtain a copy
+ * of the License at http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under
+ * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
+ * OF ANY KIND, either express or implied. See the License for the specific language
+ * governing permissions and limitations under the License.
+ */
+
+// Mark as a client only package. This will cause a build time error if you try
+// to import it from a React Server Component in a framework like Next.js.
+import 'client-only';
+
+export {
+  SideNav,
+  SideNavItem,
+  SideNavItemContent,
+  SideNavSection,
+  SideNavHeader,
+  SideNavContext
+} from '../src/SideNav';
+export type {
+  SideNavProps,
+  SideNavRenderProps,
+  SideNavItemProps,
+  SideNavItemRenderProps,
+  SideNavItemContentProps,
+  SideNavItemContentRenderProps,
+  SideNavSectionProps,
+  SideNavHeaderProps
+} from '../src/SideNav';
+export type {Key} from '@react-types/shared';
+
+export {Button} from '../src/Button';
+export type {ButtonProps, ButtonRenderProps} from '../src/Button';
+
+export {Link} from '../src/Link';
+export type {LinkProps, LinkRenderProps} from '../src/Link';

packages/react-aria-components/exports/index.ts

@@ -242,6 +242,14 @@ export {
 } from '../src/ToggleButtonGroup';
 export {Toolbar, ToolbarContext} from '../src/Toolbar';
 export {TooltipTrigger, Tooltip, TooltipTriggerStateContext, TooltipContext} from '../src/Tooltip';
+export {
+  SideNav,
+  SideNavItem,
+  SideNavItemContent,
+  SideNavSection,
+  SideNavHeader,
+  SideNavContext
+} from '../src/SideNav';
 export {
   TreeLoadMoreItem,
   Tree,
@@ -517,6 +525,16 @@ export type {ToggleButtonProps, ToggleButtonRenderProps} from '../src/ToggleButt
 export type {ToggleButtonGroupProps, ToggleButtonGroupRenderProps} from '../src/ToggleButtonGroup';
 export type {ToolbarProps, ToolbarRenderProps} from '../src/Toolbar';
 export type {TooltipProps, TooltipRenderProps, TooltipTriggerComponentProps} from '../src/Tooltip';
+export type {
+  SideNavProps,
+  SideNavRenderProps,
+  SideNavItemProps,
+  SideNavItemRenderProps,
+  SideNavItemContentProps,
+  SideNavItemContentRenderProps,
+  SideNavSectionProps,
+  SideNavHeaderProps
+} from '../src/SideNav';
 export type {
   TreeProps,
   TreeRenderProps,