disable-animations-on-low-battery.js

if (navigator.getBattery) {
    navigator.getBattery().then((battery) => {
        if (battery && battery.level < 0.2) {
            let disableAnimations = document.createElement('style');
            disableAnimations.type = 'text/css';
            disableAnimations.innerHTML = `
                * {
                    transition-property: none !important;
                    animation: none !important;
                }
            `;
            document.querySelector('head').appendChild(disableAnimations);
        }
    });
}