Example of how to organize JavaScript code for small-scale websites.

main.js

(function($, window, document) {
  var SomeSiteComponent = {
    init: function() {
      if ($('.some-class').length > 0) {
        SomeSiteComponent.setup();
      }
    },
    setup: function() {
      $(document).on('click', '.some-class .some-other-class', SomeSiteComponent.clickHandler);
    },
    clickHandler: function(event) {
      event.preventDefault();
      SomeSiteComponent.actionForClick($(this));
    }
    actionForClick: function($el) {
      // Do something with the element that was clicked on
    }
  };
  $(SomeSiteComponent.init);
})(jQuery, window, document);