Comments on: Calling JavaScript function from String

By: Spanich

Spanich — Tue, 13 Mar 2012 09:23:13 +0000

I was expecting fn to be executed under window object, so that context for the function will be window, but not the current object.
So, I need not a “call”, but “apply” method like in the following post:
http://odetocode.com/blogs/scott/archive/2007/07/05/function-apply-and-function-call-in-javascript.aspx

By: Monkey

Monkey — Tue, 14 Feb 2012 13:57:12 +0000

Also, it is not well interpreted in a “jQuery object” environnement:

var myjQueryObject = function()
{
 function oglop(arg)
 {
   alert(arg);
 }

 function init()
 {
   window['oglop']('gwok gwok!');
 }

 return {init: init, oglop: oglop};
}();

This won’t work until you create the function outside the myjQueryObject class.

By: Viral Patel

Viral Patel — Mon, 23 Jan 2012 18:46:23 +0000

Jerome, My bad I must agree I din’t know about this method. Thank you so much for getting this to my attention. I’ll update the tutorial right away and add this option as preferred solution.

By: jerome

jerome — Mon, 23 Jan 2012 17:28:16 +0000

Correct me if I’m wrong, but this could also be a good solution, provided the only hint you’ve got on the function to execute is its name :
http://stackoverflow.com/questions/912596/how-to-turn-a-string-into-a-javascript-function-call

I tried this with success :
window[functionName](param);

screw eval !!

By: Viral Patel

Viral Patel — Tue, 10 Jan 2012 16:40:43 +0000

@Ssam – I agree with you. Using eval is not advisable. But in the given situation eval is only option, where one would like to call a function at runtime using just a name.

By: ssam

ssam — Tue, 10 Jan 2012 16:03:44 +0000

eval is bad, this is the worst way of executing a function.

By: jey

jey — Wed, 14 Dec 2011 05:52:57 +0000

javascript eval() function

name0,name1,name3 are javascript variables.
jline0,jline1,jline2 are javascript arrays

str=”{name : name0,data : jline0},{name : name1,data : jline1},{name : name2,data : jline2 }”;
var ff=eval(str);

document.ready(
.
.

series :[ff]
.
.
});

I can’t pass ff value in series parameter. Please anyone help me. .

By: jonas

jonas — Tue, 04 Oct 2011 09:33:01 +0000

Great!! Been looking desperately for this functionality!!!

By: teal

teal — Mon, 26 Sep 2011 10:26:59 +0000

You should understand that using of ‘eval’ is not good enough practice. Happily all js functions are stored in huge ‘window’ object (if you use js inside browser, of course).
So you can get direct pointer to your function by calling
window['here_is_your_function_name_in_string'];
Or you can even test if this function exists:
window.hasOwnProperty(‘here_is_your_function_name_in_string’);

Ok, complete sample is:
var s = “my_function”;
if (window.hasOwnProperty(s)) window[s](params);

By: anna

anna — Mon, 26 Sep 2011 07:57:07 +0000

thx=) help me a lot