在coffeescript中使用$（this）

Question

just a quick one. How is it possible to use jQuery $(this) in Coffeescript :

$ 'input'
 .on 'click', (e) ->
  alert 'test' if $ 'this'
   .is(':checked')

can't get it to work.

Answer 1

$('input').on('click', 
  (e) ->
   if $(this).is(':checked')
     alert('test')
)

':checked' not :checked

use paranthesis - it will save your time. Trust me.