@revenuecat/purchases-ui-js/dist/components/countdown/shared-ticker.js

Web components for Paywalls. Powered by RevenueCat

import { readable } from "svelte/store";
/**
 * Wall-clock now (epoch ms) shared by every countdown so they tick in lockstep.
 * The interval runs only while at least one countdown is subscribed: Svelte's
 * `readable` starts on the first subscriber and stops on the last.
 */
export const sharedNow = readable(Date.now(), (set) => {
    set(Date.now());
    // Align the first tick to the whole second, then tick every second.
    let interval;
    const boundaryTimeout = setTimeout(() => {
        set(Date.now());
        interval = setInterval(() => set(Date.now()), 1000);
    }, 1000 - (Date.now() % 1000));
    return () => {
        clearTimeout(boundaryTimeout);
        if (interval !== undefined)
            clearInterval(interval);
    };
});