如何在 Javascript 中將 JSON 字符串值轉換為小寫？

Question

我有一些 JSON 數據，其中包含字符串和 int 值的混合。 如何將所有字符串值轉換為小寫？

例如：

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

所需的 output：

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

Answer 1

您可以使用JSON.stringify() ， JSON.parse() ， typeof

 var data = { id: 0, name: "SAMPLe", forms: { formId: 0, id: 0, text: "Sample Text" } }; var res = JSON.parse(JSON.stringify(data, function(a, b) { return typeof b === "string"? b.toLowerCase(): b })); console.log(res)

Answer 2

您需要通過 object 遞歸：

https://jsbin.com/lugokek/1/edit?js,console

var x = { id: 0, name: "SAMPLe", forms: { formId: 0, id: 0, text: "Sample Text" }};

function lower(obj) {
  for (var prop in obj) {
  if (typeof obj[prop] === 'string') {
    obj[prop] = obj[prop].toLowerCase();
  }
  if (typeof obj[prop] === 'object') {
    lower(obj[prop]);
    }
  }
  return obj;
}


console.log(lower(x));

Answer 3

需要遍歷object。

 function lowerStrings(obj) { for (let attr in obj) { if (typeof obj[attr] === 'string') { obj[attr] = obj[attr].toLowerCase(); } else if (typeof obj[attr] === 'object') { lowerStrings(obj[attr]); } } } var obj = { id: 0, name: "SAMPLe", forms: { formId: 0, id: 0, text: "Sample Text" } }; lowerStrings(obj); console.log(obj);

Answer 4

就我而言，我只想將屬性轉換為小寫，值（如密碼、數字...等）保持不變。

我的 ajax 回調結果集是：

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

我希望它是：

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

這是我的工作代碼：

我使用 mazillar 瀏覽器本機 api fetch() 而不是舊的 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(){}

Answer 5

使用json-case-convertor convertor https://www.npmjs.com/package/json-case-convertor

const jcc = require('json-case-convertor');
jcc.sentenceCaseValues(jsonData)