Node.js event on json file change -

i'm beginner in node.js , i'm having trouble watch change of json file.

i'm using json file external url (let's http://www.example.com/data.json) , want check each second if json file changed , changed.

i have managed work think there better ways this.

var json;  /** * get_json() json file , callback it's content */ function get_json(callback){     request({         url: url,         json: true     }, function (error, response, body){         if (!error && response.statuscode == 200)             callback(body);     }); }  /** * there first initiate json variable compare */ get_json(function(data){     json = data; });   /** * loop compare stored json , new 1 each second */ setinterval(function(){     get_json(function(data){         (var prop in data)         {             if (data[prop].title != json[prop].title)             {                 //do stuff data[prop]             }         }         json = data;     }); }, 1000); 

and json :

{"book":{"title":"hello"},"movie":{"title":"world"}} 

i learned events , streams i'd use tried far didn't worked.

thanks !