Bind a function to escape keypress

jquery.esc.js.coffee

# $.esc
# Binds the given callback function to the keyup
# event for the "Escape" key
# Example usage:
#   $.esc(function(event) {
#     alert("Escape key pressed!");
#   });
# Compatible with jQuery or Zepto
$.esc = (callback) ->
  $(document).on 'keyup', (event) ->
    callback?(event) if event.keyCode is 27

Example use:

$.esc(function(event) {
  alert("Escape key pressed!");
});