JavaScript: Print full path of netsted object

Question

is there anyway in JavaScript to print complete path of a nested object attribute. For example assume I have a below object

var items = [ {
  2019 : {
   December: {
      Groceries : {
        KitchenNeeds : {
         [
          "Milk",
          "cheese"
          ]
        }
      }
    }
  }
}];

To access Milk, I can access as items[0].2019.December.Groceries.KitchenNeeds[0] But is there any way, if I choose "Milk" it should print all the tree path thats needs to be travelled to get "Milk".

Does this answer your question? stackoverflow.com/a/8790711/4449191 — jared
– jared, Commented Dec 16, 2019 at 10:00
@Shashank, I have a big list of JSON object like above. So Everytime when I want to read some value, Its kind of getting hard as it is too much nested. — Raja G
– Raja G, Commented Dec 16, 2019 at 10:01
As jared mentioned refer this solution stackoverflow.com/questions/8790607/… but add additional condition for type Array and additional logic to find index of key in the array. — Shashank
– Shashank, Commented Dec 16, 2019 at 10:02

Nina Scholz · Accepted Answer · 2019-12-16 10:15:11Z

1

You could check the if the nested getting the pathe returns a truthy value and return an array with the actual key and the path of the nested value.

function getPath(object, target) {
    var path;
    if (object && typeof object === 'object') {
        Object.entries(object).some(([k, v]) => {
            if (v === target) return path = [k];
            var temp = getPath(v, target);
            if (temp) return path = [k, ...temp];
        });        
    }
    return path;
}

var items = [{ 2019: { December: { Groceries: { KitchenNeeds: ["Milk", "cheese"] } } } }];

console.log(getPath(items, 'Milk'));

answered Dec 16, 2019 at 10:15

Nina Scholz

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