I do something similar to, but simpler than gon. I have the following in my ApplicationController.
def javascript_variables(variables)
@javascript_variables ||= {}
@javascript_variables.merge!(variables)
end
Within a controller action I can then do something like
def some_action
javascript_variables(user: current_user)
end
In my ApplicationHelper I have something like this
def javascript_variables(variables = nil)
@javascript_variables ||= {}
@javascript_variables.merge!(variables) and return if !variables.nil?
output = ''
padding = @javascript_variables.keys.group_by(&:size).max.first
@javascript_variables.each do |variable, value|
output << "#{variable.to_s.ljust(padding)} = #{value.to_json},\n "
end
raw "var " + output.strip.html_safe.gsub(/\,\Z/m, ';')
end
and finally in my layout's <head> I have
<script>
<%= javascript_variables %>
</script>
This gives me something like this (from a real example in my application)
<script>
var pageModule = "site/index",
isCustomer = false,
utype = "normal",
isAnonymous = true,
keyboardShortcuts = false,
pubnub = null,
requestToken = "3zj974w074ftria3j";
</script>
