ajax no jquery browserify

gistfile1.js

var fetch = http.request({
  host: "stackoverflow.com",
  port: 80,
  path: "/",
  method: "GET",
  withCredentials: false // this is the important part
}, function(res) {
    var result = ""
    res.on('data', function(chunk) {
        result += chunk;
    });
    res.on('end', function() {
        console.log("response.................");
        console.log(result);
    });
});

fetch.setHeader('Ping', 'Pong')
fetch.end()