React-admin - Create sub menu - reactjs

Question

How to create sub menu in react-admin, because in admin-on-rest i can use prop menuItems in MenuItem Component.
Does react-admin have same props for this case?
I try create my own component, but with prop primary in ListItemText for give list name my app always show error Uncaught TypeError: Cannot read property '#global'
Thank you

Answer 1

As previously explained by the maintainers/developers of react-admin, this feature is not offered by react-admin.
If you want a sub-menu, you should create a custom menu, following the instructions given in the official react-admin documentation and implement the Material-UI's nested-list logic.
This is a simple example of what your sub-menu could look like, according to the links I provided:
<List component="nav" >
<ListItem button onClick={this.handleClick}>
<ListItemIcon>
<InboxIcon />
</ListItemIcon>
<ListItemText inset primary="YOUR-SECTION-TITLE" />
{this.state.open ? <ExpandLess /> : <ExpandMore />}
</ListItem>
<Collapse in={this.state.open} timeout="auto" unmountOnExit>
<List component="div" disablePadding>
<MenuItemLink to="/your-api-endpoint-1" primaryText="API-ENDPOINT-1" onClick={this.props.onMenuClick} />
<MenuItemLink to="/your-api-endpoint-2" primaryText="API-ENDPOINT-2" onClick={this.props.onMenuClick} />
<MenuItemLink to="/your-api-endpoint-3" primaryText="API-ENDPOINT-3" onClick={this.props.onMenuClick} />
</List>
</Collapse>
</List>

Answer 2

Simple submenu component compatible with React Admin v4 https://marmelab.com/react-admin/Menu.html
import * as React from 'react';
import { useState } from 'react';
import PropTypes from 'prop-types';
import ExpandMoreIcon from '#mui/icons-material/ExpandMore';
import { List, ListItem, ListItemText, Collapse } from '#mui/material';
import { useTranslate, useSidebarState } from 'react-admin';
export const SubMenu = (props: SubMenuProps) => {
const { isDropdownOpen = false, primaryText, leftIcon, children, ...rest } = props;
const translate = useTranslate();
const [open] = useSidebarState();
const [isOpen, setIsOpen] = useState(isDropdownOpen);
const handleToggle = () => {
setIsOpen(!isOpen);
};
return (
<React.Fragment>
<ListItem
dense
button
onClick={handleToggle}
sx={{
paddingLeft: '1rem',
color: 'rgba(0, 0, 0, 0.54)',
}}
>
{isOpen ? <ExpandMoreIcon /> : leftIcon}
<ListItemText
inset
disableTypography
primary={translate(primaryText)}
sx={{
paddingLeft: 2,
fontSize: '1rem',
color: 'rgba(0, 0, 0, 0.6)',
}}
/>
</ListItem>
<Collapse in={isOpen} timeout="auto" unmountOnExit>
<List
component="div"
disablePadding
sx={open ? {
paddingLeft: '25px',
transition: 'padding-left 195ms cubic-bezier(0.4, 0, 0.6, 1) 0ms',
} : {
paddingLeft: 0,
transition: 'padding-left 195ms cubic-bezier(0.4, 0, 0.6, 1) 0ms',
}}
>
{children}
</List>
</Collapse>
</React.Fragment>
)
}
export type SubMenuProps = {
children?: React.ReactNode;
isDropdownOpen?: boolean;
leftIcon?: React.ReactElement;
primaryText?: string;
};
export default SubMenu;
Usage:
import * as React from 'react';
import { Menu } from 'react-admin';
import BookIcon from '#mui/icons-material/Book';
import PeopleIcon from '#mui/icons-material/People';
import LabelIcon from '#mui/icons-material/Label';
import SubMenu from './SubMenu';
export const MainMenu = () => (
<Menu>
<Menu.DashboardItem />
<SubMenu primaryText="CMS" leftIcon={<BookIcon />}>
<Menu.Item to="/admin/pages" primaryText="Pages" leftIcon={<BookIcon />}/>
<Menu.Item to="/admin/articles" primaryText="Articles" leftIcon={<PeopleIcon />}/>
</SubMenu>
<Menu.Item to="/custom-route" primaryText="Miscellaneous" leftIcon={<LabelIcon />}/>
</Menu>
);