import Box from '@mui/material/Box'; import Grid from '@mui/material/Grid'; export default function HalfBorderedGrid() { const colWidth = { xs: 12, sm: 6, md: 4, lg: 3 }; return ( ({ '--Grid-borderWidth': '1px', borderTop: 'var(--Grid-borderWidth) solid', borderColor: 'divider', '& > div': { borderRight: 'var(--Grid-borderWidth) solid', borderBottom: 'var(--Grid-borderWidth) solid', borderColor: 'divider', ...Object.keys(colWidth).reduce( (result, key) => ({ ...result, [`&:nth-of-type(${12 / colWidth[key]}n)`]: { [theme.breakpoints.only(key)]: { borderRight: 'none', }, }, }), {}, ), }, })} > {[...Array(6)].map((_, index) => ( ))} ); }