Javascript 如何在 jQuery 中获取浏览器滚动位置?
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How do I get the browser scroll position in jQuery?
提问by Carlos
I have a web document with scroll. I want to get the value, in pixels, of the current scroll position. When I run the below function it returns the value zero. How can I do this?
我有一个带滚动的网络文档。我想获取当前滚动位置的值(以像素为单位)。当我运行下面的函数时,它返回零值。我怎样才能做到这一点?
<script type="text/javascript" src="js/jquery-1.7.2.js"></script>
<script type="text/javascript" src="js/jquery.mousewheel.min.js"></script>
<script type="text/javascript">
$(function (){
$('#Eframe').on("mousewheel", function() {
alert(document.body.scrollDown)
}
})
</script>
回答by
Since it appears you are using jQuery, here is a jQuery solution.
由于看起来您正在使用 jQuery,这里是一个 jQuery 解决方案。
$(function() {
$('#Eframe').on("mousewheel", function() {
alert($(document).scrollTop());
});
});
Not much to explain here. If you want, here is the jQuery documentation.
这里不多解释。如果需要,这里是jQuery 文档。
回答by Daniel Tonon
It's better to use $(window).scroll()
rather than $('#Eframe').on("mousewheel")
最好使用$(window).scroll()
而不是$('#Eframe').on("mousewheel")
$('#Eframe').on("mousewheel")
will not trigger if people manually scroll using up and down arrows on the scroll bar or grabbing and dragging the scroll bar itself.
$('#Eframe').on("mousewheel")
如果人们使用滚动条上的向上和向下箭头手动滚动或抓取并拖动滚动条本身,则不会触发。
$(window).scroll(function(){
var scrollPos = $(document).scrollTop();
console.log(scrollPos);
});
If #Eframe
is an element with overflow:scroll
on it and you want it's scroll position. I think this should work (I haven't tested it though).
如果#Eframe
是一个元素,overflow:scroll
并且你想要它的滚动位置。我认为这应该有效(不过我还没有测试过)。
$('#Eframe').scroll(function(){
var scrollPos = $('#Eframe').scrollTop();
console.log(scrollPos);
});
回答by Amos
Pure javascript can do!
纯javascript可以做到!
var scrollTop = window.pageYOffset || document.documentElement.scrollTop;