JSON AMD Loader

json.js

define("json", function(require, exports) {
  "use strict";

  // Cache used to map configuration options between load and write.
  var buildMap = {};

  load: function(name, req, load, config) {
    var xhr = new XMLHttpRequest();

    xhr.onreadystatechange = function() {
      if (xhr.readyState === 4) {
        if (config.isBuild) { 
          return load();
        }  

        load(buildMap[name] = JSON.parse(xhr.responseText));
      }
    };

    xhr.open("GET", req.toUrl(name), true);
    xhr.send(null);
  },

  write: function(pluginName, moduleName, write) {
    var stringified = JSON.stringify(buildMap[moduleName]);
    write(["define('", pluginName, "!", moduleName, "', ", stringified]);
  }
});