jquery 获取滚动距离

$(document).ready(function() {
    $(window).scroll(function() {
        var scrollTop = $(window).scrollTop();
        console.log("垂直滚动距离: " + scrollTop);
        
        // 示例：当滚动超过 100px 时显示回到顶部按钮
        if (scrollTop > 100) {
            $('#back-to-top').fadeIn();
        } else {
            $('#back-to-top').fadeOut();
        }
    });
});

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

$(window).scroll(debounce(function() {
    var scrollTop = $(window).scrollTop();
    console.log("垂直滚动距离: " + scrollTop);
}, 100));