我已经看到HTML5拖放的一些工作代码，但有任何人拖拽和复制的例子？我想将一个元素拖到一个drop元素上，但只将元素复制到这个位置。
解决方法
我将坚持这里显示的例子：
http://www.w3schools.com/html/html5_draganddrop.asp
假设我们有这个文件：
<!DOCTYPE HTML>
<html>
<head>
<script>
<!-- script comes in the text below -->
</script>
</head>
<body>
<div id="div1" ondrop="drop(event)"
ondragover="allowDrop(event)"></div>
<img id="drag1" src="img_logo.gif" draggable="true"
ondragstart="drag(event)" width="336" height="69">
</body>
</html>
正常阻力&下降
正常拖放具有分配给相应元素的功能：
function allowDrop(ev) {
/* The default handling is to not allow dropping elements. */
/* Here we allow it by preventing the default behavIoUr. */
ev.preventDefault();
}
function drag(ev) {
/* Here is specified what should be dragged. */
/* This data will be dropped at the place where the mouse button is released */
/* Here,we want to drag the element itself,so we set it's ID. */
ev.dataTransfer.setData("text/html",ev.target.id);
}
function drop(ev) {
/* The default handling is not to process a drop action and hand it to the next
higher html element in your DOM. */
/* Here,we prevent the default behavIoUr in order to process the event within
this handler and to stop further propagation of the event. */
ev.preventDefault();
/* In the drag event,we set the *variable* (it is not a variable name but a
format,please check the reference!) "text/html",now we read it out */
var data=ev.dataTransfer.getData("text/html");
/* As we put the ID of the source element into this variable,we can now use
this ID to manipulate the dragged element as we wish. */
/* Let's just move it through the DOM and append it here */
ev.target.appendChild(document.getElementById(data));
}
拖拽复制
而你必须改变drop函数，以便它复制DOM元素而不是移动它。
/* other functions stay the same */
function drop(ev) {
ev.preventDefault();
var data=ev.dataTransfer.getData("text/html");
/* If you use DOM manipulation functions,their default behavIoUr it not to
copy but to alter and move elements. By appending a ".cloneNode(true)",you will not move the original element,but create a copy. */
var nodeCopy = document.getElementById(data).cloneNode(true);
nodeCopy.id = "newId"; /* We cannot use the same ID */
ev.target.appendChild(nodeCopy);
}
试试这个页面：http://www.w3schools.com/html/tryit.asp?filename=tryhtml5_draganddrop
然后将.cloneNode(true)附加到getElementById(data)。
在Copy&之间切换糊
您甚至可以在文件管理器中执行操作：Ctrl-Key从移动到复制切换：
function drop(ev) {
ev.preventDefault();
var data=ev.dataTransfer.getData("text/html");
/* Within a Mouse event you can even check the status of some Keyboard-Buttons
such as CTRL,ALT,SHIFT. */
if (ev.ctrlKey)
{
var nodeCopy = document.getElementById(data).cloneNode(true);
nodeCopy.id = "newId"; /* We cannot use the same ID */
ev.target.appendChild(nodeCopy);
}
else
ev.target.appendChild(document.getElementById(data));
}
