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API reference docs for the React Fab component. Learn about the props, CSS, and other APIs of this exported module.


For examples and details on the usage of this React component, visit the component demo pages:


import Fab from '@mui/material/Fab';
// or
import { Fab } from '@mui/material';
You can learn about the difference by reading this guide on minimizing bundle size.

Component name

The name MuiFab can be used when providing default props or style overrides in the theme.


Props of the ButtonBase component are also available.

The content of the component.
Override or extend the styles applied to the component. See CSS API below for more details.
| 'error'
| 'info'
| 'inherit'
| 'primary'
| 'secondary'
| 'success'
| 'warning'
| string
The color of the component. It supports both default and custom theme colors, which can be added as shown in the palette customization guide.
The component used for the root node. Either a string to use a HTML element or a component.
If true, the component is disabled.
If true, the keyboard focus ripple is disabled.
If true, the ripple effect is disabled.
The URL to link to when the button is clicked. If defined, an a element will be used as the root node.
| 'medium'
| 'large'
| string
The size of the component. small is equivalent to the dense button styling.
| object
| bool>
| func
| object
The system prop that allows defining system overrides as well as additional CSS styles. See the `sx` page for more details.
| 'extended'
| string
The variant to use.

The ref is forwarded to the root element.


While not explicitly documented above, the props of the ButtonBase component are also available on Fab. You can take advantage of this to target nested components.


Rule nameGlobal classDescription
root.MuiFab-rootStyles applied to the root element.
primary.MuiFab-primaryStyles applied to the root element if color="primary".
secondary.MuiFab-secondaryStyles applied to the root element if color="secondary".
extended.MuiFab-extendedStyles applied to the root element if variant="extended".
circular.MuiFab-circularStyles applied to the root element if variant="circular".
focusVisible.Mui-focusVisibleState class applied to the ButtonBase root element if the button is keyboard focused.
disabled.Mui-disabledState class applied to the root element if disabled={true}.
colorInherit.MuiFab-colorInheritStyles applied to the root element if color="inherit".
sizeSmall.MuiFab-sizeSmallStyles applied to the root element if size="small"`.
sizeMedium.MuiFab-sizeMediumStyles applied to the root element if size="medium"`.

You can override the style of the component using one of these customization options: