Send JS errors to Slack

alerts_controller.rb

class AlertsController < ApplicationController
  include SlackHelper
  def create
    message = params[:message] || ''
    slack_post_alert message
    render nothing: true and return
  end
end

module SlackHelper
  require 'slack/post'
  def slack_post_alert(message)
    return unless Rails.env.production?
    Slack::Post.configure(
      subdomain: 'YOUR_SLACK_DOMAIN',
      token: 'SLACK_INTEGRATION_TOKEN',
      username: 'Oh noes!'
    )
    Thread.new {
      Slack::Post.post message, '#sitealerts'
    }
  end
end

slack-post gem: https://github.com/CozyCo/slack-post