jQWidgets jqxDragDrop dropTargetEnter事件

jQWidgets是一个JavaScript框架，用于为PC和移动设备制作基于Web的应用程序。它是一个非常强大的、优化的、与平台无关的、并被广泛支持的框架。jqxDragDrop用来表示一个jQuery的拖放小部件，用于使任何DOM元素可拖动。它可以与许多部件结合使用，如jqxTree、jqxGrid、jqxListBox等。

DropTargetEnter事件是在项目第一次在下降目标上时触发的。

语法:

$('#jqxDragDrop').on('dropTargetEnter ', function () {
  // Code here.
});

链接的文件：从链接中下载jQWidgets。在HTML文件中，找到下载文件夹中的脚本文件。

<link rel=”stylesheet” href=”jqwidgets/styles/jqx.base.css” type=”text/css” />
<script type=”text/javascript” src=”scripts/jquery-1.11.1.min.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqx-all.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxcore.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxdragdrop.js”></script>

例子：下面的例子说明了jqxDragDrop dropTargetEnter事件在jQWidgets中。

<!DOCTYPE html>
<html lang="en">
  
<head>
    <link rel="stylesheet" 
          href="jqwidgets/styles/jqx.base.css"
          type="text/css" />
    <script type="text/javascript"
            src="scripts/jquery-1.11.1.min.js">
    </script>
    <script type="text/javascript"
            src="jqwidgets/jqx-all.js">
    </script>
    <script type="text/javascript"
            src="jqwidgets/jqxcore.js">
    </script>
    <script type="text/javascript"
            src="jqwidgets/jqxdragdrop.js">
    </script>
</head>
  
<body class='default'>
    <center>
        <h1 style="color:green;">
            GeeksforGeeks
        </h1>
  
        <h3>jQWidgets jqxDragDrop dropTargetEnter event</h3>
  
        <div id="dragID" 
             style="width:120px;
                    height:120px;
                    border:1px solid black;
                    background-color:green;">
  
            <div style="display:flex;
                        justify-content:center;
                        align-items:center;
                        height:100%;">
                Drag me
            </div>
        </div>
  
        <div id="dropID"  
             class="dropTarget" 
             style="width:150px; 
                    height:150px; 
                    background:blue; 
                    margin-top:50px;
                    border:1px solid black;">
            <div style="display:flex;
                        justify-content:center;
                        align-items:center;
                        height:100%;">
                Drop here
            </div>
        </div>
    </center>
  
    <script type="text/javascript">
         $(document).ready(function() {$ ("#dragID").jqxDragDrop({
                dropTarget: "#dropID"
            });
  
             $('#dragID').on('dropTargetEnter', function (event) {$ ("#dropID").css({background: "red"});
            });
        });
    </script>
</body>
</html>

输出:

jQWidgets jqxDragDrop dropTargetEnter事件