javascript - Cannot read results from nodejs request result -

i make request towards fb graph api through node js' request:

 request({         url: 'https://graph.facebook.com/v2.6/' + userid + '?fields=first_name,last_name&access_token=' + token,         method: 'get',      }, function (error, response, body) {         console.log(error);         }).on('response', function (response) {         response.on('data', function (data) {             console.log('user data ' + data); // logs user data {                                               //  "first_name": "marcus",                                               //  "last_name": "green" }              var userdata = {                 firstname: data['first_name'],                 lastname: data['last_name']             };              console.log(userdata.firstname) // logs undefined         })     }); 

same happens when assign data.first_name or data.last_name

if first call console.log('user data ' + data); returns:

"user data{"first_name":"a","last_name":"b"}"

and not:

"user data[object object]"

it means, data object string, not object. if want use object , access it's fields, first parse using:

var parseddata = json.parse(data); console.log(parseddata.first_name); // logs first_name