现在，我在jsfiddle上使用这个有效的解决方案 由robertc为此stackoverflow问题创建：HTML5: dragover(), drop(): how get current x,y coordinates?
这是目前的代码:(信用到robertc）
function drag_start(event) {
var style = window.getComputedStyle(event.target, null);
event.dataTransfer.setData("text",
(parseInt(style.getPropertyValue("left"),10) - event.clientX) + ',' + (parseInt(style.getPropertyValue("top"),10) - event.clientY));
}
function drag_over(event) {
event.preventDefault();
return false;
}
function drop(event) {
var offset = event.dataTransfer.getData("text").split(',');
var dm = document.getElementById('dragme');
dm.style.left = (event.clientX + parseInt(offset[0],10)) + 'px';
dm.style.top = (event.clientY + parseInt(offset[1],10)) + 'px';
event.preventDefault();
return false;
}
var dm = document.getElementById('dragme');
dm.addEventListener('dragstart',drag_start,false);
document.body.addEventListener('dragover',drag_over,false);
document.body.addEventListener('drop',drop,false); aside {
position: absolute;
left: 0;
top: 0; /* set these so Chrome doesn't return 'auto' from getComputedStyle */
width: 200px;
background: rgba(255,255,255,0.66);
border: 2px solid rgba(0,0,0,0.5);
border-radius: 4px; padding: 8px;
}<aside draggable="true" id="dragme">
This is an aside, drag me.
</aside>
<p>I never am really satisfied that I understand anything; because, understand it well as I may, my comprehension can only be an infinitesimal fraction of all I want to understand about the many connections and relations which occur to me, how the matter in question was first thought of or arrived at, etc., etc.</p>
<p>In almost every computation a great variety of arrangements for the succession of the processes is possible, and various considerations must influence the selections amongst them for the purposes of a calculating engine. One essential object is to choose that arrangement which shall tend to reduce to a minimum the time necessary for completing the calculation.</p>
<p>Many persons who are not conversant with mathematical studies imagine that because the business of [Babbage’s Analytical Engine] is to give its results in numerical notation, the nature of its processes must consequently be arithmetical and numerical, rather than algebraical and analytical. This is an error. The engine can arrange and combine its numerical quantities exactly as if they were letters or any other general symbols; and in fact it might bring out its results in algebraical notation, were provisions made accordingly.</p>
<p>The Analytical Engine has no pretensions whatever to originate anything. It can do whatever we know how to order it to perform. It can follow analysis, but it has no power of anticipating any analytical revelations or truths. Its province is to assist us in making available what we are already acquainted with.</p>
它非常适用于唯一ID的单个元素。但是，我正在尝试使它适用于同一个类的多个元素（单独拖动）。我尝试了很多次但是没有用，我也找不到解决方案。
我想知道是否有任何HTML / Javascript专家可以帮助解决这个问题？谢谢！
答案 0 :(得分：0)
我对您的问题的理解是，您希望能够在页面上拥有多个可拖动对象。
对用户@Ingvi的信用，回答位于here。来自位于here的用户的原始PEN。
function drag_start(event) {
var style = window.getComputedStyle(event.target, null);
event.dataTransfer.setData("text/plain", (parseInt(style.getPropertyValue("left"), 10) - event.clientX) + ',' + (parseInt(style.getPropertyValue("top"), 10) - event.clientY) + ',' + event.target.getAttribute('data-item'));
}
function drag_over(event) {
event.preventDefault();
return false;
}
function drop(event) {
var offset = event.dataTransfer.getData("text/plain").split(',');
var dm = document.getElementsByClassName('dragme');
dm[parseInt(offset[2])].style.left = (event.clientX + parseInt(offset[0], 10)) + 'px';
dm[parseInt(offset[2])].style.top = (event.clientY + parseInt(offset[1], 10)) + 'px';
event.preventDefault();
return false;
}
var dm = document.getElementsByClassName('dragme');
for (var i = 0; i < dm.length; i++) {
dm[i].addEventListener('dragstart', drag_start, false);
document.body.addEventListener('dragover', drag_over, false);
document.body.addEventListener('drop', drop, false);
}aside {
position: absolute;
left: 0;
top: 0;
/* set these so Chrome doesn't return 'auto' from getComputedStyle */
width: 200px;
background: rgba(255, 255, 255, 0.66);
border: 2px solid rgba(0, 0, 0, 0.5);
border-radius: 4px;
padding: 8px;
}<aside draggable="true" class="dragme" data-item="0">One</aside>
<aside draggable="true" class="dragme second" data-item="1">Two</aside>
<p>I never am really satisfied that I understand anything; because, understand it well as I may, my comprehension can only be an infinitesimal fraction of all I want to understand about the many connections and relations which occur to me, how the matter
in question was first thought of or arrived at, etc., etc.</p>
<p>In almost every computation a great variety of arrangements for the succession of the processes is possible, and various considerations must influence the selections amongst them for the purposes of a calculating engine. One essential object is to choose
that arrangement which shall tend to reduce to a minimum the time necessary for completing the calculation.</p>
<p>Many persons who are not conversant with mathematical studies imagine that because the business of [Babbage’s Analytical Engine] is to give its results in numerical notation, the nature of its processes must consequently be arithmetical and numerical,
rather than algebraical and analytical. This is an error. The engine can arrange and combine its numerical quantities exactly as if they were letters or any other general symbols; and in fact it might bring out its results in algebraical notation, were
provisions made accordingly.</p>
<p>The Analytical Engine has no pretensions whatever to originate anything. It can do whatever we know how to order it to perform. It can follow analysis, but it has no power of anticipating any analytical revelations or truths. Its province is to assist
us in making available what we are already acquainted with.</p>