how to get json objects attribute using javascript

Question

Beginner at JSON and javascript. I need a help to get return subAttributeOne from a list of object. I don't want it's value but the string subAttributeOne.

Following is example of list,

var list = 

[

   {

   attribute1: "value",

   attribute2:[{subAttributeOne:"value",subAttributeTwo:"value"},{}]

   },

   //other objects

   {..}

]

I have tried following,

list[0].attribute2[1].subAttributeOne

it returns

value

but the result I need is

subAttributeOne

Answer 1

If you want keys from an object you can use object.keys that will bring back all the keys, but to define its position, in your case you can use like below:

Object.keys(list[0].attribute2[1])[0]

But the [0] doesn't work like an index because properties order in objects is not guarantee in JavaScript. To learn more about this I recommand you to read about : Does JavaScript Guarantee Object Property Order?

In this link you will find the definition of an Object from ECMAScript Third Edition:

4.3.3 Object

An object is a member of the type Object. It is an unordered collection of properties each of which contains a primitive value, object, or function. A function stored in a property of an object is called a method

how to get json objects attribute using javascript

Sign up