HTML ondragend事件用法及代码示例

当可拖动元素完成拖动时，将发生HTML DOM ondragend事件。

在拖放操作的不同阶段中使用并发生了一些事件：

ondragstart:开始拖动元素时发生。
ondrag:在元素拖动时发生。
ondragend:元素拖动完成时发生。

ondragenter:当拖动的元素进入放置目标时发生。
ondragover:当拖动的元素在放置目标上方时发生。
ondragleave:当拖动的元素从放置目标离开时发生。
ondrop:当拖动的元素放置在放置目标上时发生。

用法:
在HTML中：

<element ondragend="myScript">

在JavaScript中：

object.ondragend = function(){myScript};

在JavaScript中，使用addEventListener()方法：

object.addEventListener("dragend", myScript);

例：使用HTML

<!DOCTYPE HTML> 
<html> 
  
<head> 
    <title> 
        HTML DOM ondrop Event 
    </title> 
    <style> 
        .droptarget { 
            float:center; 
            width:300px; 
            height:50px; 
            margin:20px; 
            padding:5px; 
            border:6px solid green; 
        } 
    </style> 
</head> 
  
<body> 
    <center> 
        <h1 style="color:green"> 
        GeeksforGeeks 
    </h1> 
        <h2>HTML DOM ondrop Event</h2> 
  
        <div class="droptarget" 
             ondrop="Eledrop(event)" 
             ondragover="EleallowDrop(event)"> 
            
            <p ondragstart="EledragStart(event)" 
               ondragend="EledragEnd(event)" 
               draggable="true" 
               id="dragtarget"> 
              Draggable element 
          </p> 
        </div> 
  
        <div class="droptarget" 
             ondrop="Eledrop(event)"
             ondragover="EleallowDrop(event)"> 
      </div> 
  
        <p id="demo"></p> 
  
        <script> 
            function EledragStart(event) { 
                event.dataTransfer.setData("Text", event.target.id); 
                document.getElementById( 
                  "demo").innerHTML = "Dragging Started"; 
            } 
  
            function EledragEnd(event) { 
                document.getElementById( 
                  "demo").innerHTML = "Dragging Finished"; 
            } 
  
            function EleallowDrop(event) { 
                event.preventDefault(); 
            } 
  
            function Eledrop(event) { 
                event.preventDefault(); 
                var data = event.dataTransfer.getData("Text"); 
                event.target.appendChild(document.getElementById(data)); 
            } 
        </script> 
  </center> 
</body> 
  
</html>

输出

例：使用JavaScript

<!DOCTYPE HTML> 
<html> 
  
<head> 
    <title> 
        HTML DOM ondrop Event 
    </title> 
    <style> 
        .droptarget { 
            float:center; 
            width:300px; 
            height:50px; 
            margin:20px; 
            padding:5px; 
            border:6px solid green; 
        } 
    </style> 
</head> 
  
<body> 
    <center> 
        <h1 style="color:green"> 
        GeeksforGeeks 
    </h1> 
        <h2>HTML DOM ondrop Event</h2> 
  
        <div class="droptarget"> 
            <p draggable="true"
               id="dragtarget"> 
              Draggable Element 
          </p> 
        </div> 
  
        <div class="droptarget"></div> 
  
        <p id="demo"></p> 
  
        <script> 
            // Events fired on the drag target  
            document.ondragstart = function(event) { 
                event.dataTransfer.setData("Text", event.target.id); 
                document.getElementById( 
                  "demo").innerHTML = "Dragging Started"; 
            }; 
  
            document.ondragend = function(event) { 
                document.getElementById( 
                  "demo").innerHTML = "Dragging Finished"; 
            }; 
  
            // Events fired on the drop target  
            document.ondragover = function(event) { 
                event.preventDefault(); 
            }; 
  
            document.ondrop = function(event) { 
                event.preventDefault(); 
                if (event.target.className == "droptarget") { 
                    var data = event.dataTransfer.getData("Text"); 
                    event.target.appendChild(document.getElementById(data)); 
                } 
            }; 
        </script> 
    </center> 
</body> 
  
</html>

输出

例：

<!DOCTYPE HTML> 
<html> 
  
<head> 
    <title> 
        HTML DOM ondrop Event 
    </title> 
    <style> 
        .droptarget { 
            float:center; 
            width:300px; 
            height:50px; 
            margin:20px; 
            padding:5px; 
            border:6px solid green; 
        } 
    </style> 
</head> 
  
<body> 
    <center> 
        <h1 style="color:green"> 
        GeeksforGeeks 
    </h1> 
        <h2>HTML DOM ondrop Event</h2> 
        <div class="droptarget"> 
            <p draggable="true"
               id="dragtarget"> 
              Draggable element 
          </p> 
        </div> 
  
        <div class="droptarget"></div> 
  
        <p id="demo"></p> 
  
        <script> 
            // Events fired on the drag target  
            document.addEventListener("dragstart", function(event) { 
                event.dataTransfer.setData("Text", event.target.id); 
                document.getElementById( 
                  "demo").innerHTML = "Dragging Started"; 
            }); 
  
            document.addEventListener("dragend", function(event) { 
                document.getElementById( 
                  "demo").innerHTML = "Dragging Finished"; 
            }); 
  
            // Events fired on the drop target  
            document.addEventListener("dragover", function(event) { 
                event.preventDefault(); 
            }); 
  
            document.addEventListener("drop", function(event) { 
                event.preventDefault(); 
                if (event.target.className == "droptarget") { 
                    var data = event.dataTransfer.getData("Text"); 
                    event.target.appendChild(document.getElementById(data)); 
                } 
            }); 
        </script> 
    </center> 
</body> 
  
</html>

输出

支持的浏览器：下面列出了HTML DOM ondragend Event支持的浏览器：

谷歌浏览器
IE浏览器
Firefox
苹果Safari
Opera

相关用法

注：本文由纯净天空筛选整理自Vijay Sirra大神的英文原创作品 HTML | DOM ondragend Event。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。