what is the first part of a json file entry called code example

Example 1: javascript object notation

{
  "first_name": "Taylor",
  "last_name": "Hawkes",
  "age": 31,
  "address": {
    "street": "954 Kazaam Lane",
    "city": "Boulder",
    "state": "CO",
    "postalCode": "80303"
  },
  "emails": [
    {
      "type": "main",
      "number": "[email protected]"
    },
    {
      "type": "secondary",
      "number": "[email protected]"
    }
  ]
}

Example 2: json object

var myObj, x;
myObj = {"name":"John", "age":30, "car":null};
x = myObj.name;
document.getElementById("demo").innerHTML = x;