opal-phoenix 
Opal wrapper for Phoenix Framework javascript library.
usage
Server side
config.ru, Rakefile, Rails, Sinatra, etc.
require 'opal-phoenix'Gemfile
gem 'opal-phoenix'Browser side
require 'phoenix'
# setup socket
socket = Phoenix::Socket.new('ws://localhost:4000/ws', params: {some: 'param'})
socket.on_error do
$console.log 'socket error!'
end
socket.on_close do
$console.log 'socket closed!'
end
# connect to socket
socket.connect
# setup channel
channel = socket.channel('lobby', other: 'param')
channel.on_error do
$console.log 'channel error!'
end
channel.on_close do
$console.log 'channel closed!'
end
channel.on 'msg' do |payload|
$console.log "payload: #{payload}"
end
# join channel
channel
.join
.receive('ok') { $console.log 'ok' }
.receive('failed') { $console.log 'failed' }
# push a message
channel
.push("msg", {a: :b})
.receive('ok') { $console.log 'ok' }
.receive('failed') { $console.log 'failed' }