Fab API

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

Component demos

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

Floating Action Button

Import

import Fab from '@mui/material/Fab';
// or
import { Fab } from '@mui/material';

Learn about the difference by reading this guide on minimizing bundle size.

Props

Props of the ButtonBase component are also available.

Name	Type	Default	Description
children	node		The content of the component.
classes	object		Override or extend the styles applied to the component. See CSS API below for more details.
color	'default' \| 'error' \| 'info' \| 'inherit' \| 'primary' \| 'secondary' \| 'success' \| 'warning' \| string	'default'	The color of the component. It supports both default and custom theme colors, which can be added as shown in the palette customization guide.
component	elementType		The component used for the root node. Either a string to use a HTML element or a component.
disabled	bool	false	If `true`, the component is disabled.
disableFocusRipple	bool	false	If `true`, the keyboard focus ripple is disabled.
disableRipple	bool		If `true`, the ripple effect is disabled.
href	string		The URL to link to when the button is clicked. If defined, an `a` element will be used as the root node.
size	'small' \| 'medium' \| 'large' \| string	'large'	The size of the component. `small` is equivalent to the dense button styling.
sx	Array<func \| 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.
variant	'circular' \| 'extended' \| string	'circular'	The variant to use.

The ref is forwarded to the root element.

Inheritance

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

Theme default props

You can use MuiFab to change the default props of this component with the theme.

CSS classes

These class names are useful for styling with CSS. They are applied to the component's slots when specific states are triggered.

Class name	Rule name	Description
.Mui-disabled		State class applied to the root element if `disabled={true}`.
.Mui-focusVisible		State class applied to the ButtonBase root element if the button is keyboard focused.
.MuiFab-circular	circular	Styles applied to the root element if `variant="circular"`.
.MuiFab-colorInherit	colorInherit	Styles applied to the root element if `color="inherit"`.
.MuiFab-extended	extended	Styles applied to the root element if `variant="extended"`.
.MuiFab-primary	primary	Styles applied to the root element if `color="primary"`.
.MuiFab-root	root	Styles applied to the root element.
.MuiFab-secondary	secondary	Styles applied to the root element if `color="secondary"`.
.MuiFab-sizeMedium	sizeMedium	Styles applied to the root element if `size="medium"``.
.MuiFab-sizeSmall	sizeSmall	Styles applied to the root element if `size="small"``.

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

With a global class name.
With a rule name as part of the component's styleOverrides property in a custom theme.