From nested JSON data, get the parent node when a 'value' (not key) is provided.

parse_json_get_parent_of_value.js

var jsondata = {
    'name': {
		'fname': 'Jack',
		'lname': [
                    {'familyName': 'Sparrow'},
                    {'surname': 'Captain'},
                    {'tags':[
                        {'test': 'mocha'},
                        'program', 
                        {'level': 'five',}
                    ]}
                ]
	}
};

var result = get_parent_node(jsondata, 'five');
console.log(result);

function get_parent_node(dataObject, searchKey) {
    var parentRef = dataObject;
    var parent = null;
    
    this.get_parent = function (dataObject, searchKey) {
        for (i in dataObject) {
            if (dataObject[i] == searchKey) {
                parent = parentRef;
            } else if (typeof dataObject[i] == 'object') {
                 parentRef = dataObject;
    			 this.get_parent(dataObject[i], searchKey);
    		}
    	}
    }
    
    this.get_parent(dataObject, searchKey);

    return parent;
}