How to access nested array in JSON array using javascript or jQuery?

drago
March 23, 2023
249 views
0 votes
2 Answers

I have a nested array which looks like the example code below.

I need to access a nested array within my JSON array.

But the issue is that I always get undefined!

var json = {
    "status": "OK",
    "tickets": {
        "open_tickets": [{
            "id": "2",
            "assets": [{
                "id": 2446,
                "age": 4,
    
            }]
        }, {
            "id": "3",
            "assets": [{
                "id": 244564646,
                "age": 28,
            }]

        }]
    }
};

for(i=0;i<json.tickets.open_tickets.length;i++){

var id = json.tickets.open_tickets[i].id;
var age = json.tickets.open_tickets[i].assets.age;

$('.holder').append('<p>'+id+' '+age+'</p>')
 

}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="holder">



</div>

The age variable is always undefined and I cant figure out why this is happening.

what am I doing wrong?

Answers

try this out:

for (var i = 0; i < json.tickets.open_tickets.length; i++) {
    var ticket = json.tickets.open_tickets[i];
    var id = ticket.id;
    var assets = ticket.assets;
    for (var j = 0; j < assets.length; j++) {
        var age = assets[j].age;
        $('.holder').append('<p>' + id + ' ' + age + '</p>');
    }
}

You can simplify this with a for Each loop to loop through json.tickets.open_tickets and access the assets array with [0].

let holder = document.querySelector(".holder");
var json = {
  "status": "OK",
  "tickets": {
    "open_tickets": [{
      "id": "2",
      "assets": [{
        "id": 2446,
        "age": 4,

      }]
    }, {
      "id": "3",
      "assets": [{
        "id": 244564646,
        "age": 28,
      }]

    }]
  }
};

json.tickets.open_tickets.forEach((e) => {
  holder.innerHTML += '<p>' + e.id + ' ' + e.assets[0].age + '</p>'
});

<div class="holder">



</div>

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