实例代码“Ctrl+/”提示“F11/ESC”全屏 返回 格式化 恢复 运行
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<!doctype html>
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<html lang="en">
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<head>
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  <meta charset="utf-8">
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  <title>jQuery UI 放置（Droppable） - 还原 draggable 的位置</title>
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  <link rel="stylesheet" href="//apps.bdimg.com/libs/jqueryui/1.10.4/css/jquery-ui.min.css">
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  <script src="//apps.bdimg.com/libs/jquery/1.10.2/jquery.min.js"></script>
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  <script src="//apps.bdimg.com/libs/jqueryui/1.10.4/jquery-ui.min.js"></script>
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  <link rel="stylesheet" href="jqueryui/style.css">
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  <style>
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  #draggable, #draggable2 { width: 100px; height: 100px; padding: 0.5em; float: left; margin: 10px 10px 10px 0; }
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  #droppable { width: 150px; height: 150px; padding: 0.5em; float: left; margin: 10px; }
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  </style>
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  <script>
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  $(function() {
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    $( "#draggable" ).draggable({ revert: "valid" });
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    $( "#draggable2" ).draggable({ revert: "invalid" });
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    $( "#droppable" ).droppable({
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      activeClass: "ui-state-default",
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      hoverClass: "ui-state-hover",
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      drop: function( event, ui ) {