The growlyflash gem turns boring ActionDispatch::Flash messages in your Rails app to asynchronous Growl-like notifications with Bootstrap Alert markup.

With XHR requests it places flash hash to the X-Messages HTTP header or inline in javascript.

Based on rewritten in coffeescript Bootstrap Growl plugin and inspired by Bootstrap Flash Messages

Update from versions below 0.5.0

Warning! Current version breaks integration from older releases, so, if you want to update, you should check installation and customization steps again.


Add this line to your application's Gemfile:

gem 'growlyflash'

Require one of the following Growlyflash javascripts depending on your Bootstrap version in app/assets/javascripts/application.js:

For Bootstrap 3

//= require growlyflash

For Bootstrap 2

//= require growlyflash.bs2

Import Growlyflash style in app/assets/stylesheets/application.css.scss after importing Bootstrap styles:

@import "growlyflash";

To use text flash messages as growl notifications with XHR request, add use_growlyflash to your controllers (usually application_controller.rb). This is a shorthand for append_after_action :flash_to_header, if: "request.xhr?" and takes callback parameters like only, except, if or unless:

use_growlyflash # except: %i[actions without growlyflash]

# Also there is another shorthand, to skip callbacks:
# skip_growlyflash only: %i[actions without growlyflash]

To make notifications also available with non-XHR requests, insert the following line into your layout template inside <head> tag before any other javascript:

<%= growlyflash_static_notices %>

If you want your website to be compliant with Content-Security-Policy, and especially avoid script-src: 'unsafe-inline', you can use another helper to render an html tag with data attributes instead of injecting javascript code into your page:

<%= growlyflash_tag %>


If you want to change default options, you can override them somewhere in your coffee/js:

Growlyflash.defaults = $.extend on, Growlyflash.defaults,
  align:   'right'  # horizontal aligning (left, right or center)
  delay:   4000     # auto-dismiss timeout (0 to disable auto-dismiss)
  dismiss: yes      # allow to show close button
  spacing: 10       # spacing between alerts
  target:  'body'   # selector to target element where to place alerts
  title:   no       # switch for adding a title
  type:    null     # bootstrap alert class by default
  class:   ['alert', 'growlyflash', 'fade']

Also you can override few style variables before the @import directive (or just manually override styles (look at _growlyflash.scss):

$growlyflash-top:     20px !default;
$growlyflash-side:    20px !default;
$growlyflash-width:   auto !default;
$growlyflash-zindex:  9999 !default;

@import "growlyflash";

Insert the following if you want to close alert boxes by clicking on themselves. Also it doesn't steel focus from toggled elements like dropdowns and works fine with touch devices, so I advise to use it:

jQuery ->
  $(document).on "touchstart.alert click.alert", ".growlyflash", (e) ->
    ($ @).alert 'close'


  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create new Pull Request