@ledgerhq/live-common/lib-es/hooks/useTimer.js

Common ground for the Ledger Live apps

import { useState, useEffect } from "react";
export const useTimer = (seconds) => {
    const [time, setTime] = useState(seconds);
    useEffect(() => {
        const startTime = Date.now();
        const int = setInterval(() => {
            const t = Math.ceil(seconds - (Date.now() - startTime) / 1000);
            if (t <= 0) {
                clearInterval(int);
                setTime(0);
            }
            else {
                setTime(t);
            }
        }, 100);
        return () => {
            if (int)
                clearInterval(int);
        };
    }, [seconds]);
    return time;
};
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