js scroll 位置

let scrollTop = window.pageYOffset || document.documentElement.scrollTop;
let scrollLeft = window.pageXOffset || document.documentElement.scrollLeft;

window.scrollTo(x, y); // x是水平位置，y是垂直位置

window.addEventListener('scroll', function() {
    let scrollTop = window.pageYOffset || document.documentElement.scrollTop;
    console.log('当前滚动位置:', scrollTop);
});

function smoothScrollTo(targetPosition, duration) {
    let startPosition = window.pageYOffset;
    let distance = targetPosition - startPosition;
    let startTime = null;

    function animation(currentTime) {
        if (startTime === null) startTime = currentTime;
        let timeElapsed = currentTime - startTime;
        let run = ease(timeElapsed, startPosition, distance, duration);
        window.scrollTo(0, run);
        if (timeElapsed < duration) requestAnimationFrame(animation);
    }

    function ease(t, b, c, d) {
        t /= d / 2;
        if (t < 1) return c / 2 * t * t + b;
        t--;
        return -c / 2 * (t * (t - 2) - 1) + b;
    }

    requestAnimationFrame(animation);
}

// 使用示例
smoothScrollTo(500, 1000); // 平滑滚动到500px位置，持续时间为1000毫秒

function debounce(func, wait) {
    let timeout;
    return function(...args) {
        clearTimeout(timeout);
        timeout = setTimeout(() => func.apply(this, args), wait);
    };
}

window.addEventListener('scroll', debounce(function() {
    // 处理滚动事件
}, 100));