How to get the value of one specific JSON key

Question

I've searched for the answer to this question, in many places. However, the only thing I can find is how to get the values of all of a certain key in a JSON file. I would like to know if there is a way to get the value of one specific key. I have a JSON file set up like so:

{
"Category": [{
    "Subcategory": {
        "Item1": {
            "key1": "value1",
            "key2": "value2",
            "key3": "value3",
            "key4": "value4",
            "key5": "value5",
            "key6": "value6"
        },
        "Item2": {
            "key1": "value1",
            "key2": "value2",
            "key3": "value3",
            "key4": "value4",
            "key5": "value5",
            "key6": "value6"
            }
        }    
    }]
}

I would like to know a method using JQuery/Javascript to get, for example, the value of Key1 in Item1(value1).

@GerardoFurtado Would this work in the context of a script in a separate file using console.log(Category[0].Subcategory.Item1.key1? — Zuve, Jul 31 '16 at 08:53
Example: `var body = JSON.parse(file_contents); val = body.Category[0].Subcategory.Item1.key1;` — casraf, Jul 31 '16 at 08:54
Load the JSON, `JSON.parse` the text content to an object, then read the properties you want. — Leo, Jul 31 '16 at 08:55
@Zuve, a variable in the global scope is accessible to all scripts that were loaded after it's declaration. — Gerardo Furtado, Jul 31 '16 at 08:57

score 0 · Answer 1 · answered Jul 31 '16 at 08:52

0

You can simply do:

Category[0].Subcategory.Item1.key1

answered Jul 31 '16 at 08:52

Rahul Arora

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score 0 · Accepted Answer · answered Jul 31 '16 at 08:55

Like other comments and answers, you can easily get the value for a specific hard-coded key like this:

Category[0].Subcategory.Item1.key1

But if you have dynamic keys, you can do like this:

var categories = {
    "Category": [{
        "Subcategory": {
            "Item1": {
                "key1": "value1",
                "key2": "value2",
                "key3": "value3",
                "key4": "value4",
                "key5": "value5",
                "key6": "value6"
            },
            "Item2": {
                "key1": "value1",
                "key2": "value2",
                "key3": "value3",
                "key4": "value4",
                "key5": "value5",
                "key6": "value6"
            }
        }
    }]
};

var itemKeyName = "Item1";
var keyName = "key1";

console.log(categories.category[0].Subcategory[itemKeyName][keyName];

How would I use the console.log from another file. Would it be something like console.log('path/filename.json'.category[0].SubCategory.Item1.Key1); — Zuve, Jul 31 '16 at 08:58
"How would I use the console.log from another file" - does not work that way. In javascript, you cannot require another file. Although you can load it over XHR request, parse it and then log the contents to the console. — Jerguš Lejko, Jul 31 '16 at 09:01

How to get the value of one specific JSON key

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