Javascript/jquery, get all divs location at (x,y). Forwarding touches? [duplicate]

问题

Possible Duplicate:
How to get a list of all elements that resides at the clicked point?

I know I can get the element with the highest z-index by using document.elementFromPoint(x,y).

The problem is I need to get every div that contains the touch event's location.

How can I propagate touches to elements underneath?

I have seen some hacky solutions that show/hide elements while re-generating the event, or pointer-events style with css, however I cannot use these and they may cause flickering...

The following diagram illustrates what I need to do:

If the purple, green, and blue boxes represent the div elements, and the red dot is the touch location, I need a function that would return "div3, div2, div1".

回答1:

No flickering with this code:

$("body").click(function(e){
    var x = e.pageX, y = e.pageY;
    var res = [];

    var ele = document.elementFromPoint(x,y);
    while(ele && ele.tagName != "BODY" && ele.tagName != "HTML"){
        res.push(ele);
        ele.style.display = "none";
        ele = document.elementFromPoint(x,y);
    }

    for(var i = 0; i < res.length; i++){
        res[i].style.display = "";
    }
    console.log(res);
});

回答2:

What about doing:

 $(document).click(function(e) { 
    var pageX = e.pageX;
    var pageY = e.pageY;
    $('*').each(function(index) {
        var offset = $(this).offset();
        var left = offset.left;
        var right = offset.right;
        var width = $(this).width();
        var height = $(this).height();
        if(pageX > left && pageX < left + width) {
             if(pageY > top && pageY < top + height) {
                  //Handle the div
             }
        }
    });
});

来源：https://stackoverflow.com/questions/12847775/javascript-jquery-get-all-divs-location-at-x-y-forwarding-touches

标签

javascript

jquery

click

touch

event-propagation