gistfile1.js

Module("MYAPP.modules.MyModule", function (MyModule) {
  
  MyModule.fn.initialize = function (el) {
    this.element = $(el);
    this.select = this.element.find("[data-foo-select]");
  }
  
});

var mymodule = new MYAPP.modules.MyModule($("#mymodule"));

gistfile2.html

<div id="mymodule">
  <select data-foo-select>
    <option></option>
  </select>
</div>