js操作json添加元素和数据的方法

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function addServerUrlToJson() {

    var json_tem = [{"name":"a","value":1}];

    var arr  =

     {

         "name" : "aaa",

         "value" : "bbb"

     };

     json_tem.push(arr);

     document.write(JSON.stringify(json_tem));

}

结果：[{"name":"a","value":1},{"name":"aaa","value":"bbb"}]

function addServerUrlToJson() {

    var url_path_down = "http://10.10.3.221/";

    var json_tem = {"name":"a","value":1};

    json_tem["url_path_down"] = url_path_down;

    document.write(JSON.stringify(json_tem));

}

结果：{"name":"a","value":1,"url_path_down":"http://10.10.3.221/"}