todomvc-update.js

State.on('todo:update', function( todo, text ){
	// Setting the status to updating we can show
	// a deleting message in the component.
	var updated = todo.pivot().ui.set({ status: 'updating' });

	// Emulate a server call
	setTimeout( function(){
		var todo = State.get().todos.find( updated );

		// We need to pivot in the node to modify multiple children.
		// Pivoting will make children changes return the updated
		// todo instead the updated child.
		todo.pivot()
			.model.set({ title: text })
			
			// We remove the loading message now
			// when the todo has been updated.
			.ui.set({ status: 'ready' })
		;
	}, lag);
});