HTML5拖放和复制？

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));
}

HTML5拖放和复制？

解决方法

猜你在找的HTML5相关文章