Implementation of jquery easyui multi-select drop-down box

Modify the demo instance provided by the official, which is originally a single choice, let her program multiple choices, and complete all the functions of checking and unchecking.

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Basic Combo - jQuery EasyUI Demo</title>
    <link rel="stylesheet" type="text/css" href="../../themes/default/easyui.css">
    <link rel="stylesheet" type="text/css" href="../../themes/icon.css">
    <link rel="stylesheet" type="text/css" href="../demo.css">
    <script type="text/javascript" src="../../jquery.min.js"></script>
    <script type="text/javascript" src="../../jquery.easyui.min.js"></script>
</head>
<body>
    <h2>Basic Combo</h2>
    <p>Click the right arrow button to show drop down panel that can be filled with any content.</p>
    <div style="margin:20px 0"></div>
    <select id="cc" style="width:150px"></select>
    <div id="sp">
        <div style="color:#99BBE8;background:#fafafa;padding:5px;">Select a language</div>
        <div style="padding:10px">
            <input type="checkbox" name="lang" value="01"><span>Java</span><br/>
            <input type="checkbox" name="lang" value="02"><span>C#</span><br/>
            <input type="checkbox" name="lang" value="03"><span>Ruby</span><br/>
            <input type="checkbox" name="lang" value="04"><span>Basic</span><br/>
            <input type="checkbox" name="lang" value="05"><span>Fortran</span>
        </div>
    </div>
    <script type="text/javascript">
    
        $(function(){
            var s=",";//设定分隔付
            $('#cc').combo({
                required:true,//是否验证
                editable:true,//是否可编辑
                multiple:true//可否支持多选
            });
            $('#sp').appendTo($('#cc').combo('panel'));
            $('#sp input').click(function(){
                var v = $(this).next('span').text();
                if("," == s){//第一次勾选时起作用
                    s = $(this).next('span').text();
                }else if(-1 < s.indexOf(v)){//当去掉勾选时起作用
                    var n = s.indexOf(v);
                    var m = s.indexOf(v)+v.length;
                    if(0 == s.indexOf(v)){//取消第一个点击的勾选
                        s = s.substring(n+v.length+1,s.length);
                    }else if(0 < s.indexOf(v) && ((s.indexOf(v) + v.length) < s.length)){//取消非第一个和最后一个的勾选
                        s = s.substring(0,n) + s.substring(n + v.length+1,s.length);
                    }else{//取消最后一个的勾选
                        s = s.substring(0,n-1);
                    }
　　　　　　　　　　　　　　if(null == s || "" == s){
　　　　　　　　　　　　　　　　//回调自己
　　　　　　　　　　　　　　}
                }else{
                    s = s + "," + $(this).next('span').text();//将勾选各值拼接
                }
                $('#cc').combo('setValue', s).combo('setText', s).combo('showPanel');//将值赋值给文本框并在文本里显示出来
            });
        });
    </script>
</body>
</html>

https://www.cnblogs.com/lanjianqing/p/4596026.html

Implementation of jquery easyui multi-select drop-down box

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