Load JSON file

index.js

module.exports = function(path, cb) { 
  var xhr = new XMLHttpRequest();
  xhr.overrideMimeType("application/json");
  xhr.open('GET', path, true);
  xhr.onreadystatechange = function() { xhr.readyState === 4 && xhr.status === 200 && cb(JSON.parse(xhr.responseText)); };
  xhr.send(null);  
};

package.json

{
  "name": "load_json_file",
  "version": "0.1.3"
}

Use npm to import this gist:
npm i gist:579a0b064728abee63cc01f8ad1f49ff --save