fetch is not a function

Hello, I’m using fetch from npm packages and when i run the code, it says fetch is not a function. Here is my code

var fetch = require('whatwg-fetch'),
    baseUrl = 'http://localhost:3000';

var service = {
    get: function(url) {
        return fetch(baseUrl + url)
        .then(function(response) {
            return response.json();
        });
    }
};

console.log(service.get('todo')); 

//where todo is a route in my server which returns todos in json checked it with curl it's fine.

module.exports = service;

The error i’m getting is

node src/data.js                                                                                                                                            
/Path/to/fetch/src/Data.js:15
console.log(fetch('http://localhost:3000/todo'));
            ^

TypeError: fetch is not a function
    at Object.<anonymous> (/Path/to/fetch/src/Data.js:15:13)
    at Module._compile (module.js:413:34)
    at Object.Module._extensions..js (module.js:422:10)
    at Module.load (module.js:357:32)
    at Function.Module._load (module.js:314:12)
    at Function.Module.runMain (module.js:447:10)
    at startup (node.js:139:18)
    at node.js:999:3

Please help.

[nfriedly]

This bit me too, I think it might be reasonable to make it an export, in addition to creating the global to aid browserify-style usage.

[es6Test]

+1 for exports