Function useNow

packages/gitbook/src/components/hooks/useNow.ts:10–24

(refreshInterval: number = 30 * 60 * 1000)

 * @returns The current timestamp in milliseconds
 */
export function useNow(refreshInterval: number = 30 * 60 * 1000): number {
    const [now, setNow] = React.useState<number>(Date.now());

    React.useEffect(() => {
        const interval = setInterval(() => {
            setNow(Date.now());
        }, refreshInterval);

        return () => {
            clearInterval(interval);
        };
    }, [refreshInterval]);

    return now;
}