极客教程jQuery UI的Droppable scope选项
jQuery UI由GUI小工具、视觉效果和使用jQuery JavaScript库实现的主题组成。jQuery UI对于构建网页的UI界面非常有用。它可以用来建立高度互动的网络应用程序，也可以用来轻松地添加小工具。
在这篇文章中，我们将学习jQuery UI Droppable范围选项。范围选项是用来对可拖动和可下降的项目进行分组。一个可拖动和可下拉的项目应该有相同的范围值。
语法 :scope选项项需要一个字符串值，并被初始化，如下所示。
$("#dropFirst").droppable({
scope: "first",
});
- 获得scope选项。
var scopeOpt = $("#dropFirst").droppable("option", "scope");
- 设置scope选项。
$("#dropFirst").droppable("option", "scope", "first");
CDN链接。在jQuery UI项目中使用以下CDNs。
<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>
例子。在下面的例子中，我们有两个可拖动的和两个可放下的项目。scope被分别设置为第一和第二。
<!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的Droppable scope选项