由于document.elementFromPoint
返回最顶端的元素,因此您需要暂时将您的可拖动元素设置为display:none
或pointer-events:none
以查找其下方的元素。我在下面创建了一个要点,它返回给定点上所有元素的列表。
尝试
var elementsArray = KoreSampl.atPoint(x,y,yourTableElement);
或
var elementsArray = KoreSampl.fromEvent(dropEvent, yourTableElement);
然后
for(var i=0; i<elementsArray.length; i++) {
//loop through elementsArray until you find the td you're interested in
}
使用下面的要点:https://gist.github.com/2166393
;(function(){
//test for ie: turn on conditional comments
var jscript/*@[email protected][email protected]*/;
var styleProp = (jscript) ? "display" : "pointerEvents";
var KoreSampl = function() {};
KoreSampl.prototype.fromEvent = function(e, lastElement) {
e = e || window.event; //IE for window.event
return this.atPoint(e.clientX, e.clientY, lastElement);
};
KoreSampl.prototype.atPoint = function(clientX, clientY, lastElement) {
//support for child iframes
var d = (lastElement) ? lastElement.ownerDocument : document;
//the last element in the list
lastElement = lastElement || d.getElementsByTagName("html")[0];
var element = d.elementFromPoint(clientX, clientY);
if(element === lastElement || element.nodeName === "HTML") {
return [element];
} else {
var style= element.style[styleProp];
element.style[styleProp]="none"; //let us peak at the next layer
var result = [element].concat(this.atPoint(clientX,clientY,lastElement));
element.style[styleProp]= style; //restore
return result;
}
};
window["KoreSampl"] = new KoreSampl();
})();
我能够用z-index切换而不是样式切换来做同样的事情。 – matt 2014-03-29 00:00:32