init project

docs/data/system/typography/LineHeight.js

@@ -0,0 +1,11 @@
+import Typography from '@mui/material/Typography';
+import Box from '@mui/material/Box';
+
+export default function LineHeight() {
+  return (
+    <Typography component="div">
+      <Box sx={{ lineHeight: 'normal', m: 1 }}>Normal height.</Box>
+      <Box sx={{ lineHeight: 2, m: 1 }}>line-height: 2</Box>
+    </Typography>
+  );
+}