Question

var json = {
    "workbookInformation": {
        "version": "9.1",
        "source-platform": "win"
    },
    "datasources1": {
        ...
    },
    "datasources2": {
        ...
    }
}

我需要在workbookInformation下添加新密钥对

var json={
    "workbookInformation": {
         "version": "9.1",
         "source-platform": "win",
         "new_key":"new_value"
    },
    "datasources1": {
        ...
    },
    "datasources2": {
        ...
    }
}

json['new_key'] = 'new_value';添加新密钥，但我想在“workbookInformation”

下添加

Answer 1

有两种方法可以将新的键值对添加到JS中的Json对象

var jsObj = {
    "workbookInformation": {
        "version": "9.1",
        "source-platform": "win"
    },
    "datasources1": {

    },
    "datasources2": {

    }
}

1.使用点（。）

添加新属性

jsObj.workbookInformation.NewPropertyName ="Value of New Property";

2.添加新属性，指定索引，如数组。

jsObj["workbookInformation"]["NewPropertyName"] ="Value of New Property";

最后

 json = JSON.stringify(jsObj);
 console.log(json)

Answer 2

您的对象只是一个JavaScript对象，而不是JSON。您可以使用brackets notation或点符号

json["workbookInformation"]["new_key"] = "new_value";

＆＃13;

var json={
    "workbookInformation": {
     "version": "9.1",
    "source-platform": "win"
    }
    
    }

json.workbookInformation.new_key = 'new_value';
console.log(json);

＆＃13;

Answer 3

如果要为json对象的每个键添加新的键和值，然后可以使用以下代码，则可以使用其他答案的代码 -

Object.keys(json).map(
  function(object){
    json[object]["newKey"]='newValue'
});

Answer 4

这应该有效：

json.workbookInformation.new_key = 'new_value';

Answer 5

json.workbookInformation.key = value;

Answer 6

 const Districts=[
  {
    "District": "Gorkha",
    "Headquarters": "Gorkha",
    "Area": "3,610",
    "Population": "271,061"
  },
  {
    "District": "Lamjung",
    "Headquarters": "Besisahar",
    "Area": "1,692",
    "Population": "167,724"
  }
]
Districts.map(i=>i.Country="Nepal")
console.log(Districts)

如果您具有JSON数组对象而不是简单的JSON。

const Districts= [
  {
    "District": "Gorkha",
    "Headquarters": "Gorkha",
    "Area": "3,610",
    "Population": "271,061"
  },
  {
    "District": "Lamjung",
    "Headquarters": "Besisahar",
    "Area": "1,692",
    "Population": "167,724"
  }
]

然后您可以映射它以添加新密钥。

Districts.map(i=>i.Country="Nepal");

如何使用JavaScript在现有JSON对象中添加新的键值对？

6 个答案: