# App Bar

- Page: https://jiguang132.com/resources/material-ui/docs/app-bar
- Resource: Material UI (https://jiguang132.com/resources/material-ui.md)
- All guides: https://jiguang132.com/resources/material-ui/docs.md

Provide the current screen's top-level navigation and actions.

This guide covers Material UI Core with the default Emotion engine; extensions and additional demos are explicitly classified.

## Use case and business boundary

Navigation destinations and responsive menu state belong to the host; a demo search does not implement search services.

## Native composition and scope

`AppBar`, `Toolbar`, `Menu`

Preserve native Material UI composition and types; do not substitute JGuang UI/Base UI/Radix APIs. Example entries are not extra components.

## Native installation and initialization

```bash
npm install @mui/material@9.4.0 @emotion/react@11.14.0 @emotion/styled@11.14.1
```

Use native npm and Emotion, not an invented JGuang UI Registry URL. Place examples inside native ThemeProvider; choose CssBaseline or ScopedCssBaseline for the project. Inspect React, existing providers, lockfile and SSR first. Never overwrite files or conceal peer conflicts. This batch verified React 19.2.8; React 18 and below require matching react-is. See the included bilingual setup guide.

## Practical native parameters

These selected parameters are not a flattened universal API. Preserve the native declaring owner, slot structure, nullable values and generics.

| Owner.prop | Practical role | Declaration source |
| --- | --- | --- |
| `AppBar.position` | Native AppBar CSS positioning policy. | `AppBar` |
| `AppBar.color` | Owning component's native semantic/custom color, not another system's palette enum. | `AppBar` |
| `Toolbar.variant` | Owning native presentation enum; never substitute a universal variant prop. | `Toolbar` |

## Runnable native examples

Machine keys select example entries, not universal variant props. Native demo JSX/data stay unchanged; JGuang-authored acceptance fixtures are explicitly labelled.

- Basic App bar · `ButtonAppBar` · upstream native demo
- App bar with menu · `MenuAppBar` · upstream native demo
- App bar with responsive menu · `ResponsiveAppBar` · upstream native demo
- App bar with search field · `SearchAppBar` · upstream native demo
- Responsive App bar with Drawer · `DrawerAppBar` · upstream native demo
- App bar with a primary search field · `PrimarySearchAppBar` · upstream native demo
- Dense (desktop only) · `DenseAppBar` · upstream native demo
- Prominent · `ProminentAppBar` · upstream native demo
- Bottom App bar · `BottomAppBar` · upstream native demo
- Hide App bar · `HideAppBar` · upstream native demo
- Elevate App bar · `ElevateAppBar` · upstream native demo
- Back to top · `BackToTop` · upstream native demo
- Enable color on dark · `EnableColorOnDarkAppBar` · upstream native demo

## Actual usage example

Unmodified pinned native demo; copy its required local helper files together.

```tsx
import AppBar from '@mui/material/AppBar';
import Box from '@mui/material/Box';
import Toolbar from '@mui/material/Toolbar';
import Typography from '@mui/material/Typography';
import Button from '@mui/material/Button';
import IconButton from '@mui/material/IconButton';
import MenuIcon from '@mui/icons-material/Menu';

export default function ButtonAppBar() {
  return (
    <Box sx={{ flexGrow: 1 }}>
      <AppBar position="static">
        <Toolbar>
          <IconButton
            size="large"
            edge="start"
            color="inherit"
            aria-label="menu"
            sx={{ mr: 2 }}
          >
            <MenuIcon />
          </IconButton>
          <Typography variant="h6" component="div" sx={{ flexGrow: 1 }}>
            News
          </Typography>
          <Button color="inherit">Login</Button>
        </Toolbar>
      </AppBar>
    </Box>
  );
}

```

## Example dependency boundaries

`@mui/material/AppBar`, `@mui/material/Box`, `@mui/material/Toolbar`, `@mui/material/Typography`, `@mui/material/Button`, `@mui/material/IconButton`, `@mui/icons-material/Menu`, `react`, `@mui/icons-material/AccountCircle`, `@mui/material/Switch`, `@mui/material/FormControlLabel`, `@mui/material/FormGroup`, `@mui/material/MenuItem`, `@mui/material/Menu`, `@mui/material/Container`, `@mui/material/Avatar`, `@mui/material/Tooltip`, `@mui/icons-material/Adb`, `@mui/material/styles`, `@mui/material/InputBase`, `@mui/icons-material/Search`, `@mui/material/CssBaseline`, `@mui/material/Divider`, `@mui/material/Drawer`, `@mui/material/List`, `@mui/material/ListItem`, `@mui/material/ListItemButton`, `@mui/material/ListItemText`, `@mui/material/Badge`, `@mui/icons-material/Mail`, `@mui/icons-material/Notifications`, `@mui/icons-material/MoreVert`, `@mui/material/Paper`, `@mui/material/Fab`, `@mui/material/ListItemAvatar`, `@mui/material/ListSubheader`, `@mui/icons-material/Add`, `@mui/material/useScrollTrigger`, `@mui/material/Slide`, `@mui/icons-material/KeyboardArrowUp`, `@mui/material/Fade`, `@mui/material/Stack`

Direct Icons/System/Utils example imports require their matching 9.4.0 packages. Relative data/helpers are part of the example closure, not extra components. Remote images and simulated operations do not supply a backend.

## Pinned upstream API metadata reference

These tables retain the upstream metadata, not a newly inferred generic type system. Conditional generics, inherited props and callback details are defined by the source declarations below. Theme defaults may override metadata defaults.

### AppBar

```tsx
import AppBar from '@mui/material/AppBar';
import { AppBar } from '@mui/material';
```

Native inheritance: `Paper`. Parent/DOM props are not fabricated as additional own props.

| Prop | Required | Upstream metadata type / constraint | Metadata default |
| --- | --- | --- | --- |
| `children` | no | `node` | — |
| `classes` | no | `object` | — |
| `color` | no | `'default' \| 'inherit' \| 'primary' \| 'secondary' \| 'transparent' \| 'error' \| 'info' \| 'success' \| 'warning' \| string` | `'primary'` |
| `elevation` | no | `number` | `4` |
| `enableColorOnDark` | no | `bool` | `false` |
| `position` | no | `'absolute' \| 'fixed' \| 'relative' \| 'static' \| 'sticky'` | `'fixed'` |
| `square` | no | `bool` | `true` |
| `sx` | no | `Array<func \| object \| bool> \| func \| object` | — |



### Toolbar

```tsx
import Toolbar from '@mui/material/Toolbar';
import { Toolbar } from '@mui/material';
```

| Prop | Required | Upstream metadata type / constraint | Metadata default |
| --- | --- | --- | --- |
| `children` | no | `node` | — |
| `classes` | no | `object` | — |
| `component` | no | `elementType` | — |
| `disableGutters` | no | `bool` | `false` |
| `sx` | no | `Array<func \| object \| bool> \| func \| object` | — |
| `variant` | no | `'dense' \| 'regular' \| string` | `'regular'` |



### Menu

```tsx
import Menu from '@mui/material/Menu';
import { Menu } from '@mui/material';
```

Native inheritance: `Popover`. Parent/DOM props are not fabricated as additional own props.

| Prop | Required | Upstream metadata type / constraint | Metadata default |
| --- | --- | --- | --- |
| `open` | yes | `bool` | — |
| `anchorEl` | no | `HTML element \| func` | — |
| `autoFocus` | no | `bool` | `true` |
| `children` | no | `node` | — |
| `classes` | no | `object` | — |
| `disableAutoFocusItem` | no | `bool` | `false` |
| `onClose` | no | `func` | — |
| `PopoverClasses` | no | `object` | — |
| `slotProps` | no | `{ backdrop?: func \| object, list?: func \| object, paper?: func \| object, root?: func \| object, transition?: func \| object }` | `{}` |
| `slots` | no | `{ backdrop?: elementType, list?: elementType, paper?: elementType, root?: elementType, transition?: elementType }` | `{}` |
| `sx` | no | `Array<func \| object \| bool> \| func \| object` | — |
| `transitionDuration` | no | `'auto' \| number \| { appear?: number, enter?: number, exit?: number }` | `'auto'` |
| `variant` | no | `'menu' \| 'selectedMenu'` | `'selectedMenu'` |


## Native source declarations

Declarations/imports are extracted from pinned source without flattening unions or external inheritance. Original English comments/types are source reference, not a claim of translated upstream prose. Shared types stay in their native packages.

### vendor/src/AppBar/AppBar.d.ts

```ts
import * as React from 'react';

import { SxProps } from '@mui/system';

import { OverridableStringUnion } from '@mui/types';

import { OverridableComponent, OverrideProps } from '../OverridableComponent';

import { PropTypes, Theme } from '../styles';

import { AppBarClasses } from './appBarClasses';

import { ExtendPaperTypeMap } from '../Paper/Paper';

export interface AppBarPropsColorOverrides {}

export interface AppBarOwnProps {
  /**
   * Override or extend the styles applied to the component.
   */
  classes?: Partial<AppBarClasses> | undefined;
  /**
   * The color of the component.
   * It supports both default and custom theme colors, which can be added as shown in the
   * [palette customization guide](https://mui.com/material-ui/customization/palette/#custom-colors).
   * @default 'primary'
   */
  color?:
    | OverridableStringUnion<
        PropTypes.Color | 'transparent' | 'error' | 'info' | 'success' | 'warning',
        AppBarPropsColorOverrides
      >
    | undefined;
  /**
   * Shadow depth, corresponds to `dp` in the spec.
   * It accepts values between 0 and 24 inclusive.
   * @default 4
   */
  elevation?: number | undefined;
  /**
   * If true, the `color` prop is applied in dark mode.
   * @default false
   */
  enableColorOnDark?: boolean | undefined;
  /**
   * The positioning type. The behavior of the different options is described
   * [in the MDN web docs](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties/position).
   * Note: `sticky` is not universally supported and will fall back to `static` when unavailable.
   * @default 'fixed'
   */
  position?: 'fixed' | 'absolute' | 'sticky' | 'static' | 'relative' | undefined;
  /**
   * If `false`, rounded corners are enabled.
   * @default true
   */
  square?: boolean | undefined;
  /**
   * The system prop that allows defining system overrides as well as additional CSS styles.
   */
  sx?: SxProps<Theme> | undefined;
}

export type AppBarTypeMap<
  AdditionalProps = {},
  RootComponent extends React.ElementType = 'header',
> = ExtendPaperTypeMap<
  {
    props: AdditionalProps & AppBarOwnProps;
    defaultComponent: RootComponent;
  },
  'position' | 'color' | 'classes' | 'elevation' | 'square'
>;

declare const AppBar: OverridableComponent<AppBarTypeMap>;

export type AppBarProps<
  RootComponent extends React.ElementType = AppBarTypeMap['defaultComponent'],
  AdditionalProps = {},
> = OverrideProps<AppBarTypeMap<AdditionalProps, RootComponent>, RootComponent> & {
  component?: React.ElementType | undefined;
};
```

### vendor/src/Toolbar/Toolbar.d.ts

```ts
import * as React from 'react';

import { SxProps } from '@mui/system';

import { OverridableStringUnion } from '@mui/types';

import { Theme } from '../styles';

import { OverridableComponent, OverrideProps } from '../OverridableComponent';

import { ToolbarClasses } from './toolbarClasses';

export interface ToolbarPropsVariantOverrides {}

export interface ToolbarOwnProps {
  /**
   * The Toolbar children, usually a mixture of `IconButton`, `Button` and `Typography`.
   * The Toolbar is a flex container, allowing flex item properties to be used to lay out the children.
   */
  children?: React.ReactNode;
  /**
   * Override or extend the styles applied to the component.
   */
  classes?: Partial<ToolbarClasses> | undefined;
  /**
   * If `true`, disables gutter padding.
   * @default false
   */
  disableGutters?: boolean | undefined;
  /**
   * The variant to use.
   * @default 'regular'
   */
  variant?: OverridableStringUnion<'regular' | 'dense', ToolbarPropsVariantOverrides> | undefined;
  /**
   * The system prop that allows defining system overrides as well as additional CSS styles.
   */
  sx?: SxProps<Theme> | undefined;
}

export interface ToolbarTypeMap<
  AdditionalProps = {},
  RootComponent extends React.ElementType = 'div',
> {
  props: AdditionalProps & ToolbarOwnProps;
  defaultComponent: RootComponent;
}

declare const Toolbar: OverridableComponent<ToolbarTypeMap>;

export type ToolbarProps<
  RootComponent extends React.ElementType = ToolbarTypeMap['defaultComponent'],
  AdditionalProps = {},
> = OverrideProps<ToolbarTypeMap<AdditionalProps, RootComponent>, RootComponent> & {
  component?: React.ElementType | undefined;
};
```

### vendor/src/Menu/Menu.d.ts

```ts
import * as React from 'react';

import { SxProps } from '@mui/system';

import { Theme } from '../styles';

import { InternalStandardProps as StandardProps } from '../internal';

import { PaperProps } from '../Paper';

import { PopoverProps } from '../Popover';

import { MenuListProps } from '../MenuList';

import { ModalProps } from '../Modal';

import { BackdropProps } from '../Backdrop';

import { TransitionProps } from '../transitions/types';

import { MenuClasses } from './menuClasses';

import { CreateSlotsAndSlotProps, SlotComponentProps, SlotProps } from '../utils/types';

export interface MenuRootSlotPropsOverrides {}

export interface MenuPaperSlotPropsOverrides {}

export interface MenuTransitionSlotPropsOverrides {}

export interface MenuListSlotPropsOverrides {}

export interface MenuBackdropSlotPropsOverrides {}

export interface MenuSlots {
  /**
   * The component used for the popper.
   * @default Modal
   */
  root: React.ElementType;
  /**
   * The component used for the paper.
   * @default PopoverPaper
   */
  paper: React.ElementType;
  /**
   * The component used for the list.
   * @default MenuList
   */
  list: React.ElementType;
  /**
   * The component used for the transition slot.
   * @default Grow
   */
  transition: React.ElementType;
  /**
   * The component used for the backdrop slot.
   * @default Backdrop
   */
  backdrop: React.ElementType;
}

export type MenuSlotsAndSlotProps = CreateSlotsAndSlotProps<
  MenuSlots,
  {
    /**
     * Props forwarded to the root slot.
     * By default, the available props are based on the [Popover](https://mui.com/material-ui/api/popover/#props) component.
     */
    root: SlotProps<React.ElementType<ModalProps>, MenuRootSlotPropsOverrides, MenuOwnerState>;
    /**
     * Props forwarded to the paper slot.
     * By default, the available props are based on the [Paper](https://mui.com/material-ui/api/paper/#props) component.
     */
    paper: SlotProps<React.ElementType<PaperProps>, MenuPaperSlotPropsOverrides, MenuOwnerState>;
    /**
     * Props forwarded to the list slot.
     * By default, the available props are based on the [MenuList](https://mui.com/material-ui/api/menu-list/#props) component.
     */
    list: SlotProps<React.ElementType<MenuListProps>, MenuListSlotPropsOverrides, MenuOwnerState>;
    /**
     * Props forwarded to the transition slot.
     * By default, the available props are based on the [Grow](https://mui.com/material-ui/api/grow/#props) component.
     */
    transition: SlotComponentProps<
      // use SlotComponentProps because transition slot does not support `component` and `sx` prop
      React.ElementType<TransitionProps>,
      TransitionProps & MenuTransitionSlotPropsOverrides,
      MenuOwnerState
    >;
    /**
     * Props forwarded to the backdrop slot.
     * By default, the available props are based on the [Backdrop](https://mui.com/material-ui/api/backdrop/#props) component.
     */
    backdrop: SlotProps<
      React.ElementType<BackdropProps>,
      MenuBackdropSlotPropsOverrides,
      MenuOwnerState
    >;
  }
>;

export interface MenuProps
  extends StandardProps<Omit<PopoverProps, 'slots' | 'slotProps'>>, MenuSlotsAndSlotProps {
  /**
   * An HTML element, or a function that returns one.
   * It's used to set the position of the menu.
   */
  anchorEl?: PopoverProps['anchorEl'] | undefined;
  /**
   * If `true` (Default) will focus the `[role="menu"]` if no focusable child is found. Disabled
   * children are not focusable. If you set this prop to `false` focus will be placed
   * on the parent modal container. This has severe accessibility implications
   * and should only be considered if you manage focus otherwise.
   * @default true
   */
  autoFocus?: boolean | undefined;
  /**
   * Menu contents, normally `MenuItem`s.
   */
  children?: React.ReactNode;
  /**
   * Override or extend the styles applied to the component.
   */
  classes?: Partial<MenuClasses> | undefined;
  /**
   * When opening the menu will not focus the active item but the `[role="menu"]`
   * unless `autoFocus` is also set to `false`. Not using the default means not
   * following WAI-ARIA authoring practices. Please be considerate about possible
   * accessibility implications.
   * @default false
   */
  disableAutoFocusItem?: boolean | undefined;
  /**
   * Callback fired when the component requests to be closed.
   *
   * @param {object} event The event source of the callback.
   * @param {string} reason Can be: `"escapeKeyDown"`, `"backdropClick"`, `"tabKeyDown"`.
   */
  onClose?: PopoverProps['onClose'] | undefined;
  /**
   * If `true`, the component is shown.
   */
  open: boolean;
  /**
   * `classes` prop applied to the [`Popover`](https://mui.com/material-ui/api/popover/) element.
   */
  PopoverClasses?: PopoverProps['classes'] | undefined;
  /**
   * The system prop that allows defining system overrides as well as additional CSS styles.
   */
  sx?: SxProps<Theme> | undefined;
  /**
   * The length of the transition in `ms`, or 'auto'
   * @default 'auto'
   */
  transitionDuration?: TransitionProps['timeout'] | 'auto' | undefined;
  /**
   * The variant to use. Use `menu` to prevent selected items from impacting the initial focus.
   * @default 'selectedMenu'
   */
  variant?: 'menu' | 'selectedMenu' | undefined;
}

export interface MenuOwnerState extends Omit<MenuProps, 'slots' | 'slotProps'> {}

export declare const MenuPaper: React.FC<PaperProps>;

export default function Menu(props: MenuProps): React.JSX.Element;
```

## Post-install acceptance

Run strict types, production build and real interactions. Check keyboard labels/focus, disabled/error/read-only semantics where natively supported, both themes, narrow screens and reduced motion. Verify callbacks against the real host data; do not declare installation complete from copying a prompt. Initialization fixtures also require server HTML and warning-free hydration.

## Source and license

https://github.com/mui/material-ui/tree/809a7717b4c050ba3f69b75300689f07c050a16e

MIT · @mui/material@9.4.0. Vendor originals and license are preserved. Full original upstream prose remains in vendor/docs and is not represented as fully translated.

---

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