Closuer compiler enum example.

gistfile1.js

// ==ClosureCompiler==
// @compilation_level ADVANCED_OPTIMIZATIONS
// @output_file_name default.js
// ==/ClosureCompiler==

  /**
   * @enum {number}
   */
  MyNamespace.MyEnum = {
    FOO: 1,
    BAR: 2,
    BAZ: 3
  }

  /**
   * @type {MyNamespace.MyEnum}
   */
  window.foo = MyNamespace.MyEnum.FOO;