JavaScript

const base = [
      {id: 1,name: 'A1'},     {id: 11,name: 'A11'},
      {id: 12,name: 'A2'},    {id: 111,name: 'A111'},
      {id: 112,name: 'A112'}, {id: 121,name: 'A121'},
      {id: 122,name: 'A122'},
      {id: 2,name: 'A2'},{id: 3,name: 'A3'},{id: 4,name: 'A4'}
];

const tree = [
  {id: 1, parent:0, level: 'L1'}, 
      {id: 11, parent:1, level: 'L2'},
          {id: 111, parent:11, level: 'L3'}, 
          {id: 112, parent:11, level: 'L3'},
      {id: 12, parent:1, level: 'L2'}, 
          {id: 121, parent:12, level: 'L3'},
          {id: 122, parent:12, level: 'L3'},
]

i have two object one is base another one is tree. if i pass the 'id=11' it has to remove the [id:11]'s level 'L2' and its top level 'L1' id from the base object and result the remaining values. the below result am expecting

const result = [
      {id: 111,name: 'A111'},
      {id: 112,name: 'A112'}, {id: 121,name: 'A121'},
      {id: 122,name: 'A122'},
      {id: 2,name: 'A2'},{id: 3,name: 'A3'},{id: 4,name: 'A4'}
];

how to achieve this?

if(!!navigator.userAgent.match(/Trident.*rv\:11\./))
{
 window.location.href = "https://google.de";
 window.location.reload();
}

var dataJSON = {
  "Name": "Group1",
  "Description": "Test Desc",
  "Countries": [
    { 
      "Id": "188b985",
      "Name": "USA",
      "states": [
        { 
          "state": "California",
          "stateNumber": 1,
          "neighbouringStates": [ "Oregon", "Neveda" ]
        }, {
          "state": "North Carolina",
          "stateNumber": 9,
          "neighbouringStates": [ "Virginia", "Georgia" ]
        } 
      ]
    }, {
      "Id": "218b985",
      "Name": "Canada",
      "states": [
        { 
          "state": "Alberta",
          "stateNumber": 21,
          "neighbouringStates": [ "British Columbia", "British Columbia" ]
        }, {
          "state": "Ontario",
          "stateNumber": 92,
          "neighbouringStates": [ "Manitoba", "Quebec" ]
        }
      ]
    }
  ] 
};

var excludeKeys = ["Id", "stateNumber"];

Looking for help with

making a copy of the dataJSON By eliminating the keys from excludeKeys collection.
iterate recursively/loop through dataJSON to a single object with all the nested keys and values.
After flatten, the keys should be something like this

{ 
  "Name": "Group1",
  "Description": "Test Desc",
  "Countries1/Id": "188b985",
  "Countries1/Name": "USA"
  "Countries1/states1/state": "California",
  "Countries1/states1/stateNumber": 1,
  "Countries1/states1/neighbouringStates": [ "Oregon", "Neveda" ],
  "Countries1/states2/state": "North Carolina",
  "Countries1/states2/stateNumber": 9,
  "Countries1/states2/neighbouringStates": [ "Virginia", "Georgia" ],
  "Countries2/Id": "218b985",
  "Countries2/Name": "Canada",
  "Countries2/states1/state": "Alberta",
  "Countries2/states1/stateNumber": 21,
  "Countries2/states1/neighbouringStates": [ "British Columbia", "British Columbia" ],
  "Countries2/states2/state": "Ontario",
  "Countries2/states2/stateNumber": 92,
  "Countries2/states2/neighbouringStates": [ "Manitoba", "Quebec" ]
};

document.getElementById("email").value = email;

document.getElementById("calender_number").selectedIndex = value.toString();
document.getElementByValue("calender_number").selectedIndex = value.toString();
$('#calender_number').val(value.toString());

$('#calender_number').val(value.toString());