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jquery method to determine whether the scroll bar has reached the bottom or top

高洛峰
高洛峰Original
2017-01-11 09:58:161102browse

$(document).height()  //是获取整个页面的高度
$(window).height()  //是获取当前也就是浏览器所能看到的页面的那部分的高度。这个大小在你缩放浏览器窗口大小时会改变,与document是不一样的
To get the top, you only need to get the top when scrollTop()==0;

To get the bottom, you only need to get scrollTop()>=$(document).height()-$(window). height() You can know that it has scrolled to the bottom;

$(document).scrollTop() 获取垂直滚动的距离  即当前滚动的地方的窗口顶端到整个页面顶端的距离;
$(document).scrollLeft() 这是获取水平滚动条的距离;

Example:

$(document).scroll(function(){
    $("#lb").text($(document).scrollTop());
})
<span id="lb" style="top:100px;left:100px;position:fixed;"></span><!--一个固定的span标记 滚动时-->
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