如何在Javascript中将JSON字符串值转换为小写？

我有一些JSON数据，其中包含字符串和int值的混合。如何将所有字符串值转换为小写

例如：

{ id: 0, name: "SAMPLe", forms: { formId: 0, id: 0, text: "Sample Text" }}

期望输出：

{ id: 0, name: "sample", forms: { formId: 0, id: 0, text: "sample text" }}

---

您需要在对象中递归：

---

您需要遍历对象

函数lowerStringsobj{ 对于obj中的let attr{ 如果对象的类型[attr]=“string”{ obj[attr]=obj[attr].toLowerCase； }否则，如果对象的类型[attr]=“对象”{ lowerStringsobj[attr]； } } } var obj={ id:0， 名称：样本， 表单：{formId:0，id:0，text:Sample text} }; lowerStringsobj； console.logobj 您可以使用JSON.stringify、JSON.parse和typeof

风险值数据={ id:0， 名称：样本， 表格：{ formId:0， id:0， 文本：示例文本 } }; var res=JSON.parseJSON.stringifydata，functa，b{ 返回类型b==字符串？b.toLowerCase:b };

---

logres在我的例子中，我只想将属性转换为小写，密码、数字等值保持不变

我的ajax回调结果集是：

result = [{FULL_NAME:xxx}, {}, {}....... {}]

我希望它是：

 result = [{full_name:xxx}, {}, {}....... {}]

这是我的工作代码：

我使用Mazilla浏览器原生api获取，而不是旧的ajax或jquery$get等

//   **********  must use self = this ************** 
                // this reference vue-app.  must pass it to self, then pass into callback function (success call back)
                var self = this;  


                fetch(getUser_url).then(function (response) {
                                return response.json();
                        }).then(function (result) {




                                 //------------------------ properties to lowercase ----------------------
                                 // result is upper case, must convert all properties to lowercase, 
                                 // however, the value like password or number MUST remain no change. 

                                 // result = [{}, {}, {}....... {}]
                                    var result_lower_properties= [];

                                    var arrayLength = result.length;

                                    for (var i = 0; i < arrayLength; i++) {

                                        var obj = result[i];
                                        var obj_lower_properties = {};

                                        for (var prop in obj) {

                                                          //console.log(prop.toLowerCase())
                                                          //console.log(obj[prop])

                                                          obj_lower_properties[prop.toLowerCase()] = obj[prop]
                                        }// for

                                        result_lower_properties.push(obj_lower_properties)

                                    }// for

                                  //----------  ENd -------------- properties to lowercase ----------------------





                                 // must use self.user,  do not use this.user, 
                                 // because here, this's scope is just the function (result).   
                                 // we need this reference to vue-app, 
                                 self.user = result_lower_properties;  // [{}, {}, {}]  




    }); // fetch(){}

---

这一个有错误，不工作！你必须修复这个错误。

//   **********  must use self = this ************** 
                // this reference vue-app.  must pass it to self, then pass into callback function (success call back)
                var self = this;  


                fetch(getUser_url).then(function (response) {
                                return response.json();
                        }).then(function (result) {




                                 //------------------------ properties to lowercase ----------------------
                                 // result is upper case, must convert all properties to lowercase, 
                                 // however, the value like password or number MUST remain no change. 

                                 // result = [{}, {}, {}....... {}]
                                    var result_lower_properties= [];

                                    var arrayLength = result.length;

                                    for (var i = 0; i < arrayLength; i++) {

                                        var obj = result[i];
                                        var obj_lower_properties = {};

                                        for (var prop in obj) {

                                                          //console.log(prop.toLowerCase())
                                                          //console.log(obj[prop])

                                                          obj_lower_properties[prop.toLowerCase()] = obj[prop]
                                        }// for

                                        result_lower_properties.push(obj_lower_properties)

                                    }// for

                                  //----------  ENd -------------- properties to lowercase ----------------------





                                 // must use self.user,  do not use this.user, 
                                 // because here, this's scope is just the function (result).   
                                 // we need this reference to vue-app, 
                                 self.user = result_lower_properties;  // [{}, {}, {}]  




    }); // fetch(){}