(() => {
    if (window.top !== window) {
        return;
    }

    const constrainScroll = () => {
        if (document.documentElement) {
            document.documentElement.style.overscrollBehaviorY = 'none';
        }
        if (document.body) {
            document.body.style.overscrollBehaviorY = 'none';
        }
    };
    constrainScroll();
    document.addEventListener('DOMContentLoaded', constrainScroll, {
        once: true,
    });
})();