How to check if JavaScript object is JSON
- by Wei Hao
I have a nested JSON object that I need to loop through, and the value of each key could be a String, JSON array or another JSON object. Depending on the type of object, I need to carry out different operations. Is there any way I can check the type of the object to see if it is a String, JSON object or JSON array?
I tried using typeof and instanceof but both didn't seem to work, as typeof will return an object for both JSON object and array, and instanceof gives an error when I do obj instanceof JSON.
To be more specific, after parsing the JSON into a JS object, is there any way I can check if it is a normal string, or an object with keys and values (from a JSON object), or an array (from a JSON array)?
For example:
JSON
var data = {"hi":
{"hello":
["hi1","hi2"]
},
"hey":"words"
}
JavaScript
var jsonObj = JSON.parse(data);
var level1 = jsonObj.hi;
var text = jsonObj.hey;
var arr = level1.hello;
//how to check if level1 was formerly a JSON object?
//how to check if arr was formerly a JSON array?
//how to check if text is a string?
