require.js support sourcemap

bootstrap.js

requirejs.config({
  // source map
  generateSourceMaps : true,
  preserveLicenseComments : false,
  optimize : "uglify2",
  baseUrl: 'js',
  paths: {
    zepto: "lib/zepto",
    underscore: "lib/lodash",
    backbone: "lib/backbone"
  },
  shim: {
    backbone: {
      deps: ["underscore", "zepto"],
      exports: "Backbone"
    },
    zepto: {
      exports: "Zepto"
    }
  }
});

define(['zepto', 'app'], function($, App) {
  $(function() {
    new App();
  });
});