Rocket.Chat/client/admin/PageSkeleton.js

import { Box, Button, ButtonGroup, Skeleton } from '@rocket.chat/fuselage';
import React from 'react';

import Page from '../components/basic/Page';

function PageSkeleton() {
	return <Page>
		<Page.Header title={<Skeleton width='x320' maxWidth='full' />}>
			<ButtonGroup>
				<Button
					children={<Skeleton width='x80' />}
					disabled
					primary
				/>
			</ButtonGroup>
		</Page.Header>

		<Page.Content>
			<Box marginBlock='none' marginInline='auto' width='full' maxWidth='x580'>
				<Box is='p' color='hint' fontScale='p1'>
					<Skeleton />
					<Skeleton />
					<Skeleton width='75%' />
				</Box>
			</Box>
		</Page.Content>
	</Page>;
}

export default PageSkeleton;