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Checkbox implements click event to trigger content change of span element

一个新手Original: 2017-09-29 10:07:071825browse

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>checkbox</title>
    <script src="jquery.js"></script>
</head>
<body>
<p>我想去<span id="spanId">_____</span></p>
<form action="#" id="form">
    <input type="checkbox" name="city" value="南京">南京    
    <input type="checkbox" name="city" value="北京">北京    
    <input type="checkbox" name="city" value="纽约">纽约</form>
<script>
        $(function () {
            $("input[name=city]").click(function () {                
            var arr = [];
                $("input[name=city]").each(function () {                    
                if(this.checked){
                        arr.push(this.value);
                    }else{                        
                    var index = arr.indexOf(this.value);                        
                    if(index != -1){
                            arr[index] = "";
                        }
                    }
                });
                $("#spanId").text(arr.join(","));
            })
        });</script>
</body>
</html>

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Checkbox implements click event to trigger content change of span element

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