use-focus.tsx

import React from 'react';
import {Box, Text, render, useFocus} from '../../src/index.js';

function Focus() {
	return (
		<Box flexDirection="column" padding={1}>
			<Box marginBottom={1}>
				<Text>
					Press Tab to focus next element, Shift+Tab to focus previous element,
					Esc to reset focus.
				</Text>
			</Box>
			<Item label="First" />
			<Item label="Second" />
			<Item label="Third" />
		</Box>
	);
}

function Item({label}: {readonly label: string}) {
	const {isFocused} = useFocus();
	return (
		<Text>
			{label} {isFocused ? <Text color="green">(focused)</Text> : null}
		</Text>
	);
}

render(<Focus />);