js触屏滚轮加速

let startY = 0;
let endY = 0;
let startTime = 0;
let endTime = 0;

// 监听触摸开始事件
document.addEventListener('touchstart', (e) => {
    startY = e.touches[0].pageY;
    startTime = new Date().getTime();
});

// 监听触摸结束事件
document.addEventListener('touchend', (e) => {
    endY = e.changedTouches[0].pageY;
    endTime = new Date().getTime();
    handleScrollAcceleration();
});

function handleScrollAcceleration() {
    const distance = endY - startY;
    const time = endTime - startTime;
    const speed = Math.abs(distance / time); // 计算速度

    // 根据速度调整滚动距离
    const scrollDistance = speed * 10; // 这里的10是一个系数，可以根据需要调整
    window.scrollBy({
        top: distance > 0 ? -scrollDistance : scrollDistance,
        left: 0,
        behavior: 'smooth'
    });
}