获取JSON密钥的文本值

Question

I have this json data, stored in a jquery variable " jsondata ":

var jsondata = {
  "Name": {
    "Jaken": {},
    "Test": {},
    "Hello": {}
  },
  "Date": {
    "Today": {},
    "Tomorrow": {},
    "Wednesday": {}
  },
  "Description": {
    "Me": {},
    "Tester": {},
    "World": {}
  },
    "Another": {
      "Test": {},
      "Test2": {}
  }
};

I'm trying to find out how to get the word "Test" as a string.

I've tried alert(jsondata.Another[1]); , but that is, understandably, undefined . I've tried alert(value.jsondata.Another[1]); (Not sure why I thought this would work, but it was worth a shot I guess.

Is there any documentation that shows how to find the key name of json data in jquery as a string?

Answer 1

No need to use jQuery . Use Object.keys

 var jsondata = { "Name": { "Jaken": {}, "Test": {}, "Hello": {} }, "Date": { "Today": {}, "Tomorrow": {}, "Wednesday": {} }, "Description": { "Me": {}, "Tester": {}, "World": {} }, "Another": { "Test": {}, "Test2": {} } }; console.log(Object.keys(jsondata.Another)[0]); 

Answer 2

您可以使用Object.keys来获取对象的键作为数组：

Object.keys(jsondata.Another)[0];

Answer 3

This actually isn't JSON , it's an object . The variable you are looking for needs to be accessed by the key, not 1 :

alert(jsondata.Another.Test2);

As a side note...if you wanted to manipulate JSON, you would use JSON.parse() .