How to access variable sent from Rails 4 controller in JavaScript? -

i have @coords variable:

#maps controller   def index      @coords = map.all    end

inside index.html.erb, have:

<%= content_tag 'div', id: 'coords', data: @coords.to_json %>    <% end %>   

how content_tag looks after rendering html page:

[{"id":1,"vibration_level":456,"lat":"71.45543","lon":"53.43424","time_sent":"1994-05-20t00:00:00.000z","created_at":"2015-06-13t06:53:30.789z","updated_at":"2015-06-13t06:53:30.789z"} ]

how can access javascript file.

you should consider using gon gem. gem sending data rails javascript.

you can smth this:

#map controller     def index   @coords = map.all   gon.coords = @coords.to_json end 

and can acces variable in js: gon.coords