TypeScript - setInterval() with common types for web browser and Node.js

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let handle: NodeJS.Timer | number | null = null;

const scheduleInterval = (callback: () => void, delay: number): void => {
    if (handle) {
        clearInterval(handle);
    }
    handle = setInterval(callback, delay);
};

scheduleInterval((): void => { /* ... */ }, 1000);