gbmoretti/application.html.erb

## application.html.erb
<!--  layouts/application.html.erb -->
<!DOCTYPE html>
<html>
  <head>
    <%= stylesheet_link_tag  "application" %>
  </head>
  <body data-controller="<%= controller_name %>" data-view="<%= action_name %>">

      <%= yield %>


    <!-- Scripts Js -->
    <%= javascript_include_tag "application" %>

  </body>
</html>

## index.js
// app/assets/javascript/application/app/posts/index.js
window.defineAction('posts','index',function() {
  console.log('estou em posts#index');
});

## init.js
window.defineAction = function(controller,view,fn) {
  window[controller] = window[controller] || {};
  if(window[controller][view] !== undefined) {
    new Error(controller+'#'+view + ' function already defined.');
  }else {
    window[controller][view] = fn;
  }

};

window.onload = function() {
  //get controller and action from body data-attribute
  var body = window.document.getElementsByTagName('body')[0];
  var controller = body.dataset.controller;
  var action = body.dataset.view;

  if(window[controller][action] !== undefined) {
    window[controller][action]();
  }
};
	<!-- layouts/application.html.erb -->
	<!DOCTYPE html>
	<html>
	<head>
	<%= stylesheet_link_tag "application" %>
	</head>
	<body data-controller="<%= controller_name %>" data-view="<%= action_name %>">

	<%= yield %>


	<!-- Scripts Js -->
	<%= javascript_include_tag "application" %>

	</body>
	</html>
	// app/assets/javascript/application/app/posts/index.js
	window.defineAction('posts','index',function() {
	console.log('estou em posts#index');
	});
	window.defineAction = function(controller,view,fn) {
	window[controller] = window[controller] \|\| {};
	if(window[controller][view] !== undefined) {
	new Error(controller+'#'+view + ' function already defined.');
	}else {
	window[controller][view] = fn;
	}

	};

	window.onload = function() {
	//get controller and action from body data-attribute
	var body = window.document.getElementsByTagName('body')[0];
	var controller = body.dataset.controller;
	var action = body.dataset.view;

	if(window[controller][action] !== undefined) {
	window[controller][action]();
	}
	};