fontweight bold in typography material ui code example

Example 1: typography material ui bold

<Box fontWeight="fontWeightLight">…
<Box fontWeight="fontWeightRegular">…
<Box fontWeight="fontWeightMedium">…
<Box fontWeight={500}>…
<Box fontWeight="fontWeightBold">…

Example 2: change font of all material ui typography

const theme = createMuiTheme({
  typography: {
    fontFamily: 'Raleway, Arial',
  },
  overrides: {
    MuiCssBaseline: {
      '@global': {
        '@font-face': [raleway],
      },
    },
  },
});

// ...
return (
  <ThemeProvider theme={theme}>
    <CssBaseline />
    {children}
  </ThemeProvider>
);