mousedown. propagation on siblings event.targets

问题

I have 2 sibling-nodes with 'position absolute' which both handle mousedown event. How can I trigger the handler of 'div 1' when I am clicking on the transparent area of the 'div 2' (on the pic.)

回答1:

If the overlapping elements are dynamic, I don't believe it is possible to accomplish this using regular event bubbling since the two overlapping elements in question are "siblings".

I had the same problem and I was able to solve it with more of a hitTest scenerio where I test if the user's mouse position is within the same area.

function _isMouseOverMe(obj){
    var t = obj.offset().top;
    var o = obj.offset().left;
    var w = obj.width();
    var h = obj.height();
    if (e.pageX >= o+1 && e.pageX <= o+w){
        if (e.pageY >= t+1 && e.pageY <= t+h){
            return true;
        }
    }
    return false
}

回答2:

You'll want to use 3 event handlers, one for div1, one for div2, and one for contentArea. The contentArea handler should stop propagation so that the div2 handler is not called. The div2 handler should call the div1 handler:

function div1Click (e)
{
    // do something
}
function div2Click (e)
{
    div1Click.call(div1, e);
}
function contentAreaClick (e)
{
    e = e || window.event;
    if (e.stopPropagation) e.stopPropagation();
    e.cancelBubble = true;
    // do something
}
div1.onclick = div1Click;
div2.onclick = div2Click;
contentArea.onclick = contentAreaClick;

来源：https://stackoverflow.com/questions/7811073/mousedown-propagation-on-siblings-event-targets