You can use a style similar to string interpolation. See example below.
javascript:
var config = {
custom: "#{my_value ? 'truthy' : 'falsy'}",
current_user: #{raw current_user.to_json}
};
** Update below **
If you want more advanced configuration I would recommend to create a class, for example
class ClientConfig
attr_accessor :foo, :bar
# .. code
def to_json
{ foo: foo, bar: bar }.to_json
end
end
# in view file
javascript:
var config = ClientConfig.new.to_json
Else you also have the opportunity to create a ruby partial I’ve created an example below who may not be so beautiful but I works.
# template_path/_config.html.ruby
def configuration
{ foo: "Hello", bar: "World" }
end
def july_special
{ june_key: "It's June" }
end
def month_name
Date.today.strftime("%B")
end
config = month_name == 'July' ? configuration.merge(july_special) : configuration
content_tag :script, config.to_json.html_safe
# viewfile
= render 'template_path/config'
So my point is that there are multiple ways of doing this and you should try to find the way the one that suits you and your application the most. In my case, I would use my first example (before the update) if I just need one or two values else I would go for the class ClientConfig
.