react-test/docs/data/material/components/skeleton/SkeletonTypography.js

import Typography from '@mui/material/Typography';
import PropTypes from 'prop-types';
import Skeleton from '@mui/material/Skeleton';
import Grid from '@mui/material/Grid';

const variants = ['h1', 'h3', 'body1', 'caption'];

function TypographyDemo(props) {
  const { loading = false } = props;

  return (
    <div>
      {variants.map((variant) => (
        <Typography component="div" key={variant} variant={variant}>
          {loading ? <Skeleton /> : variant}
        </Typography>
      ))}
    </div>
  );
}

TypographyDemo.propTypes = {
  loading: PropTypes.bool,
};

export default function SkeletonTypography() {
  return (
    <Grid container spacing={8}>
      <Grid size="grow">
        <TypographyDemo loading />
      </Grid>
      <Grid size="grow">
        <TypographyDemo />
      </Grid>
    </Grid>
  );
}