react-examples/professional_javascript_for_web/ch20/JSONStringifyExample02.htm at master · zhangjunhd/react-examples · GitHub

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<!DOCTYPE html>
<html>
<head>
    <title>JSON Stringify Example</title>
</head>
<body>
    <p>This example serializes an object and passes in a filter function.</p>
    <script type="text/javascript">
        var book = {
                        title: "Professional JavaScript",
                        authors: [
                            "Nicholas C. Zakas"
                        ],
                        edition: 3,
                        year: 2011
                   };

        var jsonText = JSON.stringify(book, function(key, value){
            switch(key){
                case "authors":
                    return value.join(",")

                case "year":
                    return 5000;

                case "edition":
                    return undefined;

                default:
                    return value;
            }
        });
        alert(jsonText);

    </script>
</body>
</html>