javascript: function call to itself

Question

I suppose the following code:

jQuery("#mybutton").click(function(){

    //do something

});

How could I recall to this function "anonymous"?, I can not put a name to this function:

var xfun = function(){

    //do something

}

jQuery("#mybutton").click(xfun);

I can do something like this:

var working = false;
jQuery("#mybutton").click(function(){

  if (working){
    var _this = this;
    _this._eventType = e.type;
    setTimeout(function() { jQuery(_this).trigger(_this._eventType); }, 200);
    return false;
  }
  //do something

});

what I need is something like this:

var working = false;
jQuery("#mybutton").click(function(){

  if (working){
    setTimeout( this_function, 200);
    return false;
  }
  //do something

});

thanks.

EDIT:

Solution:

jQuery("#mybutton").click(function(){
  if (working){
    var fn = arguments.callee;
    var _this = this;
    setTimeout(function(){fn.call(_this);}, 200);
    return false;
  }
  //do something    
});

@Oscar: the question is "how do I re-run an anonymous function from inside the anonymous function?" — Crescent Fresh, Nov 24 '09 at 18:00

score 20 · Accepted Answer · answered Nov 24 '09 at 17:58

20

You can indeed name your anonymous function:

jQuery("#mybutton").click(function doWork(){
  if (working){
    setTimeout(doWork, 200);
    return false;
  }
  //do something    
});

You can also use arguments.callee:

jQuery("#mybutton").click(function(){
  if (working){
    setTimeout(arguments.callee, 200);
    return false;
  }
  //do something    
});

I'd go with the former.

answered Nov 24 '09 at 17:58

Crescent Fresh

115,249
25
154
140

3

@andres: np. Tis an important question considering the deprecation of `arguments.callee`: https://developer.mozilla.org/En/Core_JavaScript_1.5_Reference/Functions_and_function_scope/arguments/callee – Crescent Fresh Nov 24 '09 at 18:07
3

Only `Function.arguments.callee` is deprecated (the whole of `Function.arguments` is a terrible idea); `arguments.callee` is still OK. Whilst I too would probably go with the named function expression, note there is a bug in IE where the name is visible not only inside the function as expected, but also in the parent scope, as if you'd written a function statement. So make sure you don't use the name `doWork` in the surrounding function (or global). – bobince Nov 24 '09 at 18:39
with the modification that I show in question (edition), I could solve the problem that had the context of the function. thank @Crescent Fresh – andres descalzo Nov 25 '09 at 11:40
worth noting, a named function is no longer anonymous. it's just a closure. – buley Jul 04 '12 at 21:57

score 1 · Answer 2 · edited Feb 19 '14 at 12:14

1

Can you explain why you can't name the function? You can use arguments.callee to get a reference to the current function, but that is deprecated and I'm not sure how much support it has among current browsers.

edited Feb 19 '14 at 12:14

MMM

7,221
2
24
42

answered Nov 24 '09 at 18:06

jthg

2,790
3
29
32

javascript: function call to itself

2 Answers2

Linked