Flashy provides helper methods to render flash messages in Rails views. Besides, it provides a javascript library to create flash messages in the browser

Flashy comes with Bootstrap classes for easy integration with Boostrap alerts

Add to your Gemfile

gem 'flashy'

Besides, you need to require the javascript in your app/assets/application.js

//= require flashy

Just render the flash partial with

<%= flashy %>

Create new flash errors from client using:

Flashy.message('error', 'This is the error explanation');