Just a tiny helper function to get the query string out of an object (one level deep)

to_query_string.js

// note: this does not work for nested objects
var toQueryString = function(obj) {
  return Object.keys(obj).map(function(key) {
    return key + '=' + obj[key];
  }).join('&');
};

toQueryString({}); // returns ''
toQueryString({foo: 'bar'}); // returns 'foo=bar'
toQueryString({billable: true, locked: false}); // returns 'billable=true&locked=false'

This doesn't handle when a query string doesn't have a value, it should then return null.

See: https://github.com/sindresorhus/query-string