unexpected token at '(node:7103) DeprecationWarning: 'root' is deprecated, use 'global' '

I am working on a ruby on rails project and when I have add some coffee-script in haml view file then it gives error. I am wondering from last day why this happening

784: unexpected token at '(node:7486) [DEP0016] DeprecationWarning: 'root' is deprecated, use 'global'

coffee-script code

:coffeescript
  $ ->
    $('#chaperone').click (event) ->
      console.log('testing')

If i have remove this code from haml view file then it works fine but what is wrong with this code?? how can i fix it??