jquery 下翻一屏

// 点击按钮时向下滚动一屏
$("#scrollButton").click(function() {
    var screenHeight = $(window).height();
    $(window).scrollTop($(window).scrollTop() + screenHeight);
});

$("#scrollButton").click(function() {
    var screenHeight = $(window).height();
    $('html, body').animate({
        scrollTop: $(window).scrollTop() + screenHeight
    }, 800); // 800毫秒的动画时长
});

$("#scrollButton").click(function() {
    var screenHeight = $(window).height();
    var documentHeight = $(document).height();
    var currentScroll = $(window).scrollTop();

    if (currentScroll + screenHeight < documentHeight) {
        $('html, body').animate({
            scrollTop: currentScroll + screenHeight
        }, 800);
    }
});