javascript - Coffescript compile constructor with wrong argument name -

i'm trying use first time coffeescript angularjs.

i want define new service dependence service $http

here i'm expecting:

var myservice = function($http) {     this.$http = $http; };  myservice.prototype.call = function(url, data) {   this.$http(url, data); };  myapp.service("webservice", myservice) 

this normal way register service shown in angularjs documentation.

after reading article working coffeescript , angularjs, have tried this:

myapp.service "webservice", class     constructor : (@$http) ->     call : (url, data) -> @$http url, data 

but result of compilation give javascript:

myapp.service("webservice", (function() {     function _class(_at_$http) {         this.$http = _at_$http;     }      _class.prototype.call = function(url, data) {         return this.$http(url, data);     };      return _class;  })()); 

the problem coffeescript compiler shouldn't replace @$http _at_$http. in case should output javascript:

myapp.service("webservice", (function() {     function _class($http) {         this.$http = $http;     }      _class.prototype.call = function(url, data) {         return this.$http(url, data);     };      return _class;  })()); 

you can view online compiler on coffeescript website give expected result, don't understand why mine not working well.

and need because of angular injection engine not recognize _at_$http because expect $http parameter name.

you need upgrade coffeescript 1.9.1 or higher:

• internal compiler variable names no longer start underscores. makes generated javascript bit prettier, , fixes issue broken , ungodly way angularjs "parses" function arguments.

if can't upgrade hook instance variable hand:

constructor : ($http) -> @$http = $http 

everything works fine @ coffeescript.org because they're running latest version.