App Bar

The App Bar displays information and actions relating to the current screen.

The top App Bar provides content and actions related to the current screen. It's used for branding, screen titles, navigation, and actions.

It can transform into a contextual action bar or be used as a navbar.

Basic App Bar

App Bar with menu

App Bar with responsive menu

App Bar with search field

A side searchbar.

App Bar with a primary search field

A primary searchbar.

Dense (desktop only)

Prominent

A prominent app bar.

Bottom App Bar

Fixed placement

When you render the app bar position fixed, the dimension of the element doesn't impact the rest of the page. This can cause some part of your content to be invisible, behind the app bar. Here are 3 possible solutions:

1. You can use position="sticky" instead of fixed. ⚠️ sticky is not supported by IE11.
2. You can render a second <Toolbar /> component:

function App() {
  return (
    <React.Fragment>
      <AppBar position="fixed">
        <Toolbar>{/* content */}</Toolbar>
      </AppBar>
      <Toolbar />
    </React.Fragment>
  );
}

3. You can use theme.mixins.toolbar CSS:

const Offset = styled('div')(({ theme }) => theme.mixins.toolbar);

function App() {
  return (
    <React.Fragment>
      <AppBar position="fixed">
        <Toolbar>{/* content */}</Toolbar>
      </AppBar>
      <Offset />
    </React.Fragment>
  );
}

Scrolling

You can use the useScrollTrigger() hook to respond to user scroll actions.

Hide App Bar

The app bar hides on scroll down to leave more space for reading.

Elevate App Bar

The app bar elevates on scroll to communicate that the user is not at the top of the page.

Back to top

A floating action buttons appears on scroll to make it easy to get back to the top of the page.

useScrollTrigger([options]) => trigger

Arguments

1. options (object [optional]):

   • options.disableHysteresis (bool [optional]): Defaults to false. Disable the hysteresis. Ignore the scroll direction when determining the trigger value.
   • options.target (Node [optional]): Defaults to window.
   • options.threshold (number [optional]): Defaults to 100. Change the trigger value when the vertical scroll strictly crosses this threshold (exclusive).

Returns

trigger: Does the scroll position match the criteria?

Examples

import useScrollTrigger from '@mui/material/useScrollTrigger';

function HideOnScroll(props) {
  const trigger = useScrollTrigger();
  return (
    <Slide in={!trigger}>
      <div>Hello</div>
    </Slide>
  );
}

Enable color on dark

Following the Material Design guidelines, the color prop has no effect on the appearance of the app bar in dark mode. You can override this behavior by setting the enableColorOnDark prop to true.

API

• <AppBar />
• <Menu />
• <Toolbar />