If the progress bar is describing the loading progress of a particular region of a page, you should use aria-describedby to point to the progress bar, and set the aria-busy attribute to true on that region until it has finished loading.


Name Type Default Description
classes object   Override or extend the styles applied to the component. See CSS API below for more details.
color enum: 'primary' |
'primary' The color of the component. It supports those theme colors that make sense for this component.
value number   The value of the progress indicator for the determinate and buffer variants. Value between 0 and 100.
valueBuffer number   The value for the buffer variant. Value between 0 and 100.
variant enum: 'determinate' |
 'indeterminate' |
 'buffer' |
'indeterminate' The variant of progress indicator. Use indeterminate or query when there is no progress value.

Any other properties supplied will be spread to the root element (native element).


You can override all the class names injected by Material-UI thanks to the classes property. This property accepts the following keys:

  • root
  • colorPrimary
  • colorSecondary
  • buffer
  • query
  • dashed
  • dashedColorPrimary
  • dashedColorSecondary
  • bar
  • barColorPrimary
  • barColorSecondary
  • bar1Indeterminate
  • bar2Indeterminate
  • bar1Determinate
  • bar1Buffer
  • bar2Buffer

Have a look at overriding with classes section and the implementation of the component for more detail.

If using the overrides key of the theme as documented here, you need to use the following style sheet name: MuiLinearProgress.