jQuery UI Droppable scope用法及代码示例

jQuery UI 由 GUI 小部件、视觉效果和使用 jQuery JavaScript 库实现的主题组成。 jQuery UI 非常适合为网页构建 UI 接口。它可用于构建高度交互的 Web 应用程序，或者可用于轻松添加小部件。

在本文中，我们将学习 jQuery UI Droppable 范围选项。范围选项用于对可拖动和可放置项目集进行分组。可拖动和可放置的项目应具有相同的范围值。

用法：这范围选项项目需要一个string值并且是已初始化如下：

$("#dropFirst").droppable({
    scope: "first",
});

获取范围选项：

var scopeOpt = $("#dropFirst").droppable("option", "scope");

设置范围选项：

$("#dropFirst").droppable("option", "scope", "first");

CDN 链接：将以下 CDN 用于 jQuery UI 项目。

<link rel=”stylesheet” href=”https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.css” />
<script src=”https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js”></script>
<script src=”https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js”></script>

示例：在下面的例子中，我们有两个可拖动和两个可掉落项目。这范围被设定为第一的和第二分别。

HTML


<!DOCTYPE html> 
<html lang="en"> 
  
<head> 
    <meta charset="UTF-8" /> 
    <meta http-equiv="X-UA-Compatible" 
          content="IE=edge" /> 
    <meta name="viewport" 
          content="width=device-width, initial-scale=1.0" /> 
    <link rel="stylesheet" 
          href= 
"https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.css" /> 
    <script src= 
"https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js"> 
    </script> 
    <script src= 
"https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js"> 
    </script> 
    <style type="text/css"> 
    .square_draggable { 
        width: 50px; 
        height: 50px; 
        border: 1px solid black; 
        margin: 5px; 
        text-align: center; 
        line-height: 50px; 
        background-color: lightblue; 
        cursor: pointer; 
        border-radius: 10px; 
    } 
  
    .square_droppable { 
        width: 100px; 
        height: 100px; 
        border: 1px dotted gray; 
        margin: 5px; 
        text-align: center; 
        line-height: 100px; 
        background-color: lightgray; 
    } 
  
    .container { 
        background-color: darkgreen; 
        width: 500px; 
        height:300px; 
        margin: auto; 
    } 
    </style> 
</head> 
  
<body> 
    <div data-role="page" id="gfgpage"> 
        <h1 style="color: green;"> 
            GeeksforGeeks 
        </h1> 
        <div data-role="main" class="ui-content"> 
            <h3>jQuery UI Droppable scope option</h3> 
            <div id="gfg_container" 
                 class="container"> 
                <div id="dragFirst" 
                     class="square_draggable"> 
                        Item 1</div> 
                <div style="float:left"> 
                    <div id="dragSecond" 
                         class="square_draggable"> 
                         Item 2</div> 
                </div> 
                <div style="float:left;margin-left:50px;"> 
                    <div id="dropFirst" 
                         class="square_droppable"> 
                         Scope : first</div> 
                </div> 
                <div style="float:left;margin-left:50px;"> 
                    <div id="dropSecond" 
                         class="square_droppable"> 
                         Scope : second</div> 
                </div> 
            </div> 
        </div> 
    </div> 
    <script> 
    $(function() { 
        $("#dragFirst").draggable({ 
            scope: "first", 
            containment: "#gfg_container" 
        }); 
  
        $("#dragSecond").draggable({ 
            scope: "second", 
            containment: "#gfg_container" 
        }); 
  
        $("#dropFirst").droppable({ 
            scope: "first", 
            drop: function(event, ui) { 
                $(this).css("background-color", "lightgreen") 
            }, 
            over: function(event, ui) { 
                $(this).css("background-color", "green") 
            }, 
            out: function(event, ui) { 
                $(this).css("background-color", "lightgray") 
            } 
        }); 
  
        $("#dropSecond").droppable({ 
            scope: "second", 
            drop: function(event, ui) { 
                $(this).css("background-color", "lightgreen") 
            }, 
            over: function(event, ui) { 
                $(this).css("background-color", "green") 
            }, 
            out: function(event, ui) { 
                $(this).css("background-color", "lightgray") 
            } 
        }); 
  
    }); 
    </script> 
</body> 
  
</html>

输出

jQuery UI 可放置范围选项

参考：https://api.jqueryui.com/droppable/#option-scope

相关用法

注：本文由纯净天空筛选整理自RajeevSarkar大神的英文原创作品 jQuery UI Droppable scope Option。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。