这里有一个技术，它不依赖于jquery，并使用本机DOM匹配API。它使用厂商前缀支持回到IE9的浏览器。详情请参阅caniuse.com上的matchesselector。

首先创建matchesSelector函数，如下所示:

var matchesSelector = (function(ElementPrototype) {
var fn = ElementPrototype.matches ||
          ElementPrototype.webkitMatchesSelector ||
          ElementPrototype.mozMatchesSelector ||
          ElementPrototype.msMatchesSelector;

return function(element, selector) {
  return fn.call(element, selector);
};

})(Element.prototype);

然后，检测悬停:

var mouseIsOver = matchesSelector(element, ':hover');

只是供未来的发现者参考。

我做了一个jQuery插件，可以做到这一点和更多。在我的插件中，要获得当前光标悬停的所有元素，只需执行以下操作:

$.cursor("isHover"); // will return jQ object of all elements the cursor is 
                     // currently over & doesn't require timer

正如我提到的，它还有很多其他用途，您可以在这里找到的jsFiddle中看到

You can test with jQuery if any child div has a certain class. Then by applying that class when you mouse over and out out a certain div, you can test whether your mouse is over it, even when you mouse over a different element on the page Much less code this way. I used this because I had spaces between divs in a pop-up, and I only wanted to close the pop up when I moved off of the pop up, not when I was moving my mouse over the spaces in the pop up. So I called a mouseover function on the content div (which the pop up was over), but it would only trigger the close function when I moused-over the content div, AND was outside the pop up!

$(".pop-up").mouseover(function(e)
    {
    $(this).addClass("over");
    });

$(".pop-up").mouseout(function(e)
    {
    $(this).removeClass("over");
    });


$("#mainContent").mouseover(function(e){
            if (!$(".expanded").hasClass("over")) {
            Drupal.dhtmlMenu.toggleMenu($(".expanded"));
        }
    });

上面Arthur Goldsmith的回答很流行也很有用:如果你在IE中将鼠标从一个元素移动到另一个元素(至少在IE 9之前)，如果新元素的背景是透明的(默认情况下是透明的)，你可能会遇到一些麻烦。我的解决办法是给新元素一个透明的背景图像。

我不能使用上面的任何建议。 为什么我更喜欢我的解决方案? 此方法检查鼠标是否在您所选择的任何时间停留在元素上。 Mouseenter和:hover很酷，但是Mouseenter只在你移动鼠标时触发，而不是当元素在鼠标下移动时触发。 :盘旋很可爱，但是…即

所以我这样做:

没有1。每次鼠标移动时，存储鼠标x, y位置， 没有2。检查鼠标是否在任何匹配查询的元素上…比如触发mouseenter事件

// define mouse x, y variables so they are traced all the time
var mx = 0; //  mouse X position
var my = 0; //  mouse Y position

// update mouse x, y coordinates every time user moves the mouse
$(document).mousemove(function(e){
    mx = e.pageX;
    my = e.pageY;
});

// check is mouse is over an element at any time You need (wrap it in function if You need to)
$("#my_element").each(function(){
    boxX = $(this).offset().left;
    boxY = $(this).offset().top;
    boxW = $(this).innerWidth();
    boxH = $(this).innerHeight();
    if ((boxX <= mx) &&
        (boxX + 1000 >= mx) &&
        (boxY <= my) &&
        (boxY + boxH >= my))
    {
        // mouse is over it so you can for example trigger a mouseenter event
        $(this).trigger("mouseenter");
    }
});

这将是最简单的方法!

  function(oi) 
  {
   if(!$(oi).is(':hover')){$(oi).fadeOut(100);}
  }