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Add PostCSS configuration and skills lock file

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- Created a new PostCSS configuration file to integrate Tailwind CSS.
- Added a skills lock file containing various Expo skills with their respective source and computed hashes.
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2026-03-09 06:41:01 +07:00
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# Toolbars and headers
Add native iOS toolbar items to Stack screens. Items can be placed in the header (left/right) or in a bottom toolbar area.
**Important:** iOS only. Available in Expo SDK 55+.
## Notes app example
```tsx
import { Stack } from "expo-router";
import { ScrollView } from "react-native";
export default function FoldersScreen() {
return (
<>
{/* ScrollView must be the first child of the screen */}
<ScrollView
style={{ flex: 1 }}
contentInsetAdjustmentBehavior="automatic"
>
{/* Screen content */}
</ScrollView>
<Stack.Screen.Title large>Folders</Stack.Screen.Title>
<Stack.SearchBar placeholder="Search" onChangeText={() => {}} />
{/* Header toolbar - right side */}
<Stack.Toolbar placement="right">
<Stack.Toolbar.Button icon="folder.badge.plus" onPress={() => {}} />
<Stack.Toolbar.Button onPress={() => {}}>Edit</Stack.Toolbar.Button>
</Stack.Toolbar>
{/* Bottom toolbar */}
<Stack.Toolbar placement="bottom">
<Stack.Toolbar.SearchBarSlot />
<Stack.Toolbar.Button
icon="square.and.pencil"
onPress={() => {}}
separateBackground
/>
</Stack.Toolbar>
</>
);
}
```
## Mail inbox example
```tsx
import { Color, Stack } from "expo-router";
import { useState } from "react";
import { ScrollView, Text, View } from "react-native";
export default function InboxScreen() {
const [isFilterOpen, setIsFilterOpen] = useState(false);
return (
<>
<ScrollView
style={{ flex: 1 }}
contentInsetAdjustmentBehavior="automatic"
contentContainerStyle={{ paddingHorizontal: 16 }}
>
{/* Screen content */}
</ScrollView>
<Stack.Screen options={{ headerTransparent: true }} />
<Stack.Screen.Title>Inbox</Stack.Screen.Title>
<Stack.SearchBar placeholder="Search" onChangeText={() => {}} />
{/* Header toolbar - right side */}
<Stack.Toolbar placement="right">
<Stack.Toolbar.Button onPress={() => {}}>Select</Stack.Toolbar.Button>
<Stack.Toolbar.Menu icon="ellipsis">
<Stack.Toolbar.Menu inline>
<Stack.Toolbar.Menu inline title="Sort By">
<Stack.Toolbar.MenuAction isOn>
Categories
</Stack.Toolbar.MenuAction>
<Stack.Toolbar.MenuAction>List</Stack.Toolbar.MenuAction>
</Stack.Toolbar.Menu>
<Stack.Toolbar.MenuAction icon="info.circle">
About categories
</Stack.Toolbar.MenuAction>
</Stack.Toolbar.Menu>
<Stack.Toolbar.MenuAction icon="person.circle">
Show Contact Photos
</Stack.Toolbar.MenuAction>
</Stack.Toolbar.Menu>
</Stack.Toolbar>
{/* Bottom toolbar */}
<Stack.Toolbar placement="bottom">
<Stack.Toolbar.Button
icon="line.3.horizontal.decrease"
selected={isFilterOpen}
onPress={() => setIsFilterOpen((prev) => !prev)}
/>
<Stack.Toolbar.View hidden={!isFilterOpen}>
<View style={{ width: 70, height: 32, justifyContent: "center" }}>
<Text style={{ fontSize: 12, fontWeight: 700 }}>Filter by</Text>
<Text
style={{
fontSize: 12,
fontWeight: 700,
color: Color.ios.systemBlue,
}}
>
Unread
</Text>
</View>
</Stack.Toolbar.View>
<Stack.Toolbar.Spacer />
<Stack.Toolbar.SearchBarSlot />
<Stack.Toolbar.Button
icon="square.and.pencil"
onPress={() => {}}
separateBackground
/>
</Stack.Toolbar>
</>
);
}
```
## Placement
- `"left"` - Header left
- `"right"` - Header right
- `"bottom"` (default) - Bottom toolbar
## Components
### Button
- Icon button: `<Stack.Toolbar.Button icon="star.fill" onPress={() => {}} />`
- Text button: `<Stack.Toolbar.Button onPress={() => {}}>Done</Stack.Toolbar.Button>`
**Props:** `icon`, `image`, `onPress`, `disabled`, `hidden`, `variant` (`"plain"` | `"done"` | `"prominent"`), `tintColor`
### Menu
Dropdown menu for grouping actions.
```tsx
<Stack.Toolbar.Menu icon="ellipsis">
<Stack.Toolbar.Menu inline>
<Stack.Toolbar.MenuAction>Sort by Recently Added</Stack.Toolbar.MenuAction>
<Stack.Toolbar.MenuAction isOn>
Sort by Date Captured
</Stack.Toolbar.MenuAction>
</Stack.Toolbar.Menu>
<Stack.Toolbar.Menu title="Filter">
<Stack.Toolbar.Menu inline>
<Stack.Toolbar.MenuAction isOn icon="square.grid.2x2">
All Items
</Stack.Toolbar.MenuAction>
</Stack.Toolbar.Menu>
<Stack.Toolbar.MenuAction icon="heart">Favorites</Stack.Toolbar.MenuAction>
<Stack.Toolbar.MenuAction icon="photo">Photos</Stack.Toolbar.MenuAction>
<Stack.Toolbar.MenuAction icon="video">Videos</Stack.Toolbar.MenuAction>
</Stack.Toolbar.Menu>
</Stack.Toolbar.Menu>
```
**Menu Props:** All Button props plus `title`, `inline`, `palette`, `elementSize` (`"small"` | `"medium"` | `"large"`)
**MenuAction Props:** `icon`, `onPress`, `isOn`, `destructive`, `disabled`, `subtitle`
When creating a palette with dividers, use `inline` combined with `elementSize="small"`. `palette` will not apply dividers on iOS 26.
### Spacer
```tsx
<Stack.Toolbar.Spacer /> // Bottom toolbar - flexible
<Stack.Toolbar.Spacer width={16} /> // Header - requires explicit width
```
### View
Embed custom React Native components. When adding a custom view make sure that there is only a single child with **explicit width and height**.
```tsx
<Stack.Toolbar.View>
<View style={{ width: 70, height: 32, justifyContent: "center" }}>
<Text style={{ fontSize: 12, fontWeight: 700 }}>Filter by</Text>
</View>
</Stack.Toolbar.View>
```
You can pass custom components to views as well:
```tsx
function CustomFilterView() {
return (
<View style={{ width: 70, height: 32, justifyContent: "center" }}>
<Text style={{ fontSize: 12, fontWeight: 700 }}>Filter by</Text>
</View>
);
}
...
<Stack.Toolbar.View>
<CustomFilterView />
</Stack.Toolbar.View>
```
## Recommendations
- When creating more complex headers, extract them to a single component
```tsx
export default function Page() {
return (
<>
<ScrollView>{/* Screen content */}</ScrollView>
<InboxHeader />
</>
);
}
function InboxHeader() {
return (
<>
<Stack.Screen.Title>Inbox</Stack.Screen.Title>
<Stack.SearchBar placeholder="Search" onChangeText={() => {}} />
<Stack.Toolbar placement="right">{/* Toolbar buttons */}</Stack.Toolbar>
</>
);
}
```
- When using `Stack.Toolbar`, make sure that all `Stack.Toolbar.*` components are wrapped inside `Stack.Toolbar` component.
This will **not work**:
```tsx
function Buttons() {
return (
<>
<Stack.Toolbar.Button icon="star.fill" onPress={() => {}} />
<Stack.Toolbar.Button onPress={() => {}}>Done</Stack.Toolbar.Button>
</>
);
}
function Page() {
return (
<>
<ScrollView>{/* Screen content */}</ScrollView>
<Stack.Toolbar placement="right">
<Buttons /> {/* ❌ This will NOT work */}
</Stack.Toolbar>
</>
);
}
```
This will work:
```tsx
function ToolbarWithButtons() {
return (
<Stack.Toolbar>
<Stack.Toolbar.Button icon="star.fill" onPress={() => {}} />
<Stack.Toolbar.Button onPress={() => {}}>Done</Stack.Toolbar.Button>
</Stack.Toolbar>
);
}
function Page() {
return (
<>
<ScrollView>{/* Screen content */}</ScrollView>
<ToolbarWithButtons /> {/* ✅ This will work */}
</>
);
}
```
## Limitations
- iOS only
- `placement="bottom"` can only be used inside screen components (not in layout files)
- `Stack.Toolbar.Badge` only works with `placement="left"` or `"right"`
- Header Spacers require explicit `width`
## Reference
Docs https://docs.expo.dev/versions/unversioned/sdk/router - read to see the full API.