Triggering mousemove on the mouse's current position

javascript

Solution

You actually can create a `mousemove` event object to pass in, using something like this:

window.onload = function () {
    document.getElementById("test").onmousemove = function(e) { console.log(e); };
    document.getElementById("test").onclick = function(e) { 
        var e = document.createEvent('MouseEvents'); 
        e.initMouseEvent('mousemove',true,true,document.defaultView,<detail>,<screenX>,<screenY>,<mouseX>,<mouseY>,false,false,false,false,<button>,null);
        this.onmousemove(e); 
    };
};

Of course, here I'm firing it on a click, but you can do it on whatever event you want, such as when your div becomes visible, check to see if the mouse is within it. You just need to make sure your parameters are right, and you need to track the mouse position on your own. Also, there's some differences in IE, I think. Here's my source: http://chamnapchhorn.blogspot.com/2008/06/artificial-mouse-events-in-javascript.html. He added a little extra code to account for it.

Here's a fiddle to play around with. http://jsfiddle.net/grimertop90/LxT7V/1/

Problem

Suppose we have a `<div>` with a `mousemove` handler bound to it. If the mouse pointer enters and moves around this `div`, the event is triggered. However, I am dealing with a rich web application where `<div>`s move around the screen, appear and disappear... So it may happen that a `<div>` appears under the mouse pointer. In this case, `mousemove` is not triggered. However, I need it to be. (Note that replacing `mousemove` with `mouseover` does not change this behavior.) Specifically, the `<div>` has to be highlighted and I deem it as a UI flaw to require the user to do a slight mouse move in order to trigger the highlighting. Is it possible to trigger the `mousemove` event programatically? And I do not mean ``` document.getElementById('mydiv').onmousemove(); ``` because `onmousemove` is parametrised by the `event` object, which I do not have. Is it possible to make browser behave as if `onmousemove` was triggered on the current mouse's position (although in fact the mouse didn't move)?

Original source