如何检测浏览器窗口是否滚动到底部?

我需要检测用户是否滚动到页面底部。如果它们在页面的底部，当我在底部添加新内容时，我会自动将它们滚动到新的底部。如果他们不在底部，他们正在阅读页面上更高的先前内容，所以我不想自动滚动他们，因为他们想呆在那里。

我如何检测用户是否滚动到页面的底部，或者他们是否在页面上滚动得更高?

当前回答

这是

window.onscroll = function() {

    // @var int totalPageHeight
    var totalPageHeight = document.body.scrollHeight; 

    // @var int scrollPoint
    var scrollPoint = window.scrollY + window.innerHeight;

    // check if we hit the bottom of the page
    if(scrollPoint >= totalPageHeight)
    {
        console.log("at the bottom");
    }
}

如果您正在寻找支持旧浏览器(IE9)的替换窗口。使用window.pageYOffset进行滚动

2017-10-12 20:36:14

其他回答

window.onscroll = function(ev) {
    if ((window.innerHeight + window.scrollY) >= document.body.offsetHeight) {
        // you're at the bottom of the page
    }
};

看到演示

2012-02-25 00:03:27

所有主要浏览器支持的更新代码(包括IE10和IE11)

window.onscroll = function(ev) {
    if ((window.innerHeight + window.pageYOffset) >= document.body.offsetHeight) {
        alert("you're at the bottom of the page");
    }
};

目前公认答案的问题在于这个窗口。scrollY在IE中不可用。

以下是mdn关于scrollY的引用:

为了跨浏览器兼容，请使用window。pageYOffset代替window.scrollY。

还有一个工作片段:

window.onscroll = function(ev) { if ((window.innerHeight + window.pageYOffset ) >= document.body.offsetHeight) { alert("you're at the bottom of the page"); } };

mac注意事项

根据@Raphaël的评论，由于一个小偏移，mac出现了一个问题。更新后的条件如下:

(window.innerHeight + window.pageYOffset) >= document.body.offsetHeight - 2

我没有机会进一步测试，如果有人能评论这个具体问题，那就太好了。

2016-11-02 00:55:33

如上所述，代码可能无法在所有设备和浏览器上运行。下面是经过测试的工作代码，将兼容所有主要设备(iPhone, Android, PC)在所有浏览器(Chrome, IE, Edge, Firefox和Safari)。

window.onscroll = function(ev) { var pageHeight = Math.max(document.body.scrollHeight, document.body.offsetHeight, document.documentElement.clientHeight, document.documentElement.scrollHeight, document.documentElement.offsetHeight ); if ((window.innerHeight + window.scrollY) >= pageHeight) { console.log("You are at the bottom of the page."); } }; <html> <body> <div style="width:100%; height:1500px"> Keep scrolling the page till end... </div> </body> </html>

2022-01-26 07:56:22

如果你喜欢jquery

$(window).scroll(function() {
  if($(window).scrollTop() + $(window).height() >= $(document).height()) {
    // doSomethingHere();
  }
});

2018-10-19 17:15:17

我一直在寻找答案，但还没有找到确切的答案。这是一个纯javascript解决方案，与最新的Firefox, IE和Chrome在这个答案的时间:

// document.body.scrollTop alone should do the job but that actually works only in case of Chrome.
// With IE and Firefox it also works sometimes (seemingly with very simple pages where you have
// only a <pre> or something like that) but I don't know when. This hack seems to work always.
var scrollTop = (document.documentElement && document.documentElement.scrollTop) || document.body.scrollTop;

// Grodriguez's fix for scrollHeight:
// accounting for cases where html/body are set to height:100%
var scrollHeight = (document.documentElement && document.documentElement.scrollHeight) || document.body.scrollHeight;

// >= is needed because if the horizontal scrollbar is visible then window.innerHeight includes
// it and in that case the left side of the equation is somewhat greater.
var scrolledToBottom = (scrollTop + window.innerHeight) >= scrollHeight;

// As a bonus: how to scroll to the bottom programmatically by keeping the horizontal scrollpos:
// Since window.innerHeight includes the height of the horizontal scrollbar when it is visible
// the correct vertical scrollTop would be
// scrollHeight-window.innerHeight+sizeof(horizontal_scrollbar)
// Since we don't know the visibility/size of the horizontal scrollbar
// we scroll to scrollHeight that exceeds the value of the
// desired scrollTop but it seems to scroll to the bottom with all browsers
// without problems even when the horizontal scrollbar is visible.
var scrollLeft = (document.documentElement && document.documentElement.scrollLeft) || document.body.scrollLeft;
window.scrollTo(scrollLeft, scrollHeight);

2014-03-14 01:38:53

如何检测浏览器窗口是否滚动到底部?

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