Placeholder component for router outlet while loading or not working

[zestack]

We needs a placeholder for router outlet:

import { Routes, Route, Outlet } from 'react-router-dom'
const App = () => {
    <Routes>
        <Route path="/*" element={<Outlet placeholder={<ThePlaceholderComponent />} />}>
            {/* child route */}
        </Route>
    <Routes/>
}

so want add placeholder properties to Outlet component.