init project

docs/data/material/components/button-group/LoadingButtonGroup.tsx

@@ -0,0 +1,15 @@
+import ButtonGroup from '@mui/material/ButtonGroup';
+import Button from '@mui/material/Button';
+import SaveIcon from '@mui/icons-material/Save';
+
+export default function LoadingButtonGroup() {
+  return (
+    <ButtonGroup variant="outlined" aria-label="Loading button group">
+      <Button>Submit</Button>
+      <Button>Fetch data</Button>
+      <Button loading loadingPosition="start" startIcon={<SaveIcon />}>
+        Save
+      </Button>
+    </ButtonGroup>
+  );
+}