how to pass dynamic key to json object

Question

I need result like the following json object:

testObj = [{
  test1: "cat",
  category: "Animal"
}, {
  test2: "parrot",
  category: "Bird"
}, {
  test3: "Dog",
  category: "Animal"
}]

Answer 1

Create an object than push to your testObj array. Like this

obj = { test1: "cat",category: "Animal"};
testObj.push(obj);

This will create you required dynamic JSON array.