提升javascript事件或从XY坐标获取对象-raisejavascripteventsorgetanobjectfromXYcoords

There's no way to raise a mousemove and have it fill in the resulting target element properties, no.

没有办法提高鼠标移动并让它填充结果目标元素属性,没有。

There is a way to get an element from arbitrary co-ordinates, but you won't like it much. It involves walking over each page element and calculating its dimensions (from offsetLeft/Top/Parent) and which elements overlay which other elements (from calculated styles ‘position’ and ‘z-index’)... essentially, re-implementing part of the browser's own layout engine in script. And if you have elements with ‘overflow’ scroll/auto you have even more calculation to do.

有一种方法可以从任意坐标中获取一个元素,但你不会喜欢它。它涉及遍历每个页面元素并计算其尺寸(来自offsetLeft / Top / Parent)以及哪些元素覆盖哪些其他元素(来自计算出的样式'position'和'z-index')...基本上,重新实现部分浏览器自己的脚本布局引擎。如果你有'溢出'滚动/自动的元素你还有更多的计算要做。

If you have a limited case (eg. you can only drop the div somewhere amongst a set of other statically-positioned divs) it can be manageable, but the general case is quite hard and in no way fun. (Maybe someone somewhere has packaged such a feature up into a library or framework plugin, but I've not met one yet.)

如果你有一个有限的案例(例如,你只能把div放在一组其他静态定位的div中)它可以是可管理的,但一般情况是相当困难的,并没有任何乐趣。 (也许有人在某个地方将这样的功能打包到库或框架插件中,但我还没有遇到过。)

If you can find another way to make your drag'n'drop behave nicely that doesn't require you to do this, then do that!

如果你能找到另一种方法让你的拖拽行为很好,而不需要你这样做,那就去做吧!

Not directly answering your question, but have you tried using a Javascript library such as jQuery UI? It provides good drag/drop support & you can do the sorts of things your talking about... eg. you can make certain elements of your page draggable & others droppable & then handle the events when the user drags an element around. It provides a tolerance on the dropables that includes 'touch' (as well as 'fit', 'intersect', 'pointer'), so then you could handle the 'over' event of your dropable targets & you'd get an event handler that fires when the corner of your div is over a given element. This event handler gives you a reference to the element being dragged as well as the element its being dragged over. (a bit backwards to how you asked the question, but should be usable in solving the same problems).

没有直接回答你的问题,但你尝试过使用jQuery UI等Javascript库吗?它提供了良好的拖放支持,你可以做你所谈论的各种事情......例如。您可以使页面的某些元素可拖动,其他元素可以拖放,然后在用户拖动元素时处理事件。它为dropables提供了一个容差,包括'touch'(以及'fit','intersect','pointer'),这样你就可以处理可丢弃目标的'over'事件并且你会得到一个事件当div的一个角落在给定元素上时触发的处理程序。此事件处理程序为您提供对被拖动元素以及被拖动元素的引用。 (有点倒退到你问的问题,但应该可用于解决相同的问题)。

Hope that's of some help...

希望有一些帮助......

To get an object from it's coordinates, there's document.elementFromPoint(x,y). Quirksmode's compatibility table shows that it's available on most recent browsers.

要从它的坐标获取对象,有document.elementFromPoint(x,y)。 Quirksmode的兼容性表显示它在最新的浏览器中可用。