# frozen_string_literal: true
module ActionCable
module Helpers
module ActionCableHelper
# Returns an "action-cable-url" meta tag with the value of the URL specified in your
# configuration. Ensure this is above your JavaScript tag:
#
#
# <%= action_cable_meta_tag %>
# <%= javascript_include_tag 'application', 'data-turbolinks-track' => 'reload' %>
#
#
# This is then used by Action Cable to determine the URL of your WebSocket server.
# Your CoffeeScript can then connect to the server without needing to specify the
# URL directly:
#
# #= require cable
# @App = {}
# App.cable = Cable.createConsumer()
#
# Make sure to specify the correct server location in each of your environment
# config files:
#
# config.action_cable.mount_path = "/cable123"
# <%= action_cable_meta_tag %> would render:
# =>
#
# config.action_cable.url = "ws://actioncable.com"
# <%= action_cable_meta_tag %> would render:
# =>
#
def action_cable_meta_tag
tag "meta", name: "action-cable-url", content: (
ActionCable.server.config.url ||
ActionCable.server.config.mount_path ||
raise("No Action Cable URL configured -- please configure this at config.action_cable.url")
)
end
end
end
end