By using the breakpoints attribute of the theme, you can utilize the same breakpoints used for the Grid and Hidden components directly in your component.
API
theme.breakpoints.up(key) => media query
Arguments
key (String | Number): A breakpoint key (xs, sm, etc.) or a screen width number in pixels.
Returns
media query: A media query string ready to be used with JSS.
Examples
const styles = theme => ({
root: {
backgroundColor: 'blue',
[theme.breakpoints.up('md')]: {
backgroundColor: 'red',
},
},
});
For more information check this out