javascript - Alternative to arguments.callee -

i have eventlistener listens entire document , records keystrokes, want remove listener when conditions met.

the following snippet of code:

document.addeventlistener('keyup', function(e) {     var letter_entered = string.fromcharcode(e.keycode).tolowercase();     player.makeguess(letter_entered);      if(player.win_status === true || player.lose_status === true) {         document.removeeventlistener('keyup', arguments.callee, false);     } }); 

this works, according mozilla developer docs method has been deprecated.

i'm aware can name function, is there alternative allow me continue using unnamed function?

use following process:

• create variable
• assign anonymous function variable
• invoke variable reference
• the anonymous function references using variable name

use such:

   var foo = function(e)     {     "use strict";     console.log(e);     document.removeeventlistener('keyup', foo, false);     }  document.addeventlistener('keyup', foo); 

you can solve problem using y combinator:

function y(f) {     return function () {         return f.bind(null, y(f)).apply(this, arguments);     }; } 

now can rewrite code follows:

document.addeventlistener("keyup", y(function (callee, e) {     player.makeguess(string.fromcharcode(e.keycode).tolowercase());     if (player.win_status || player.lose_status) document         .removeeventlistener("keyup", callee); })); 

that's folks.