Call function via string?

Question

I have a string variable js_inject and I am looking for a way to call the js_inject() function via the string. Is there any way to do this other than the example below? I am really looking to do this without conditionals.

var myString = 'js_inject';

moderator(stringVar){
  if(stringVar == 'js_inject'){
   js_inject();
  }
}

moderator(myString);

Have you try eval(myString)? Where my myString = 'js_inject()'. It might be simplistic, but that should work. — David Laberge
– David Laberge, Commented Sep 12, 2011 at 23:00
Except eval is evil. A script kiddy could very well alter this javascript code and kill his own browser... — GolezTrol
– GolezTrol, Commented Sep 12, 2011 at 23:03
@GolezTrol A script kiddy could very well alter this javascript code and kill his own browser ... looks like a strong argument in favor of eval — KooiInc
– KooiInc, Commented Sep 12, 2011 at 23:07
Always great to see this question. Again. And again. 496961, 359788, 912596, 1451145, 1144297, .... :-) — Ray Toal
– Ray Toal, Commented Sep 12, 2011 at 23:08
possible duplicate of How do I call a JavaScript function name using a string? — KooiInc
– KooiInc, Commented Sep 12, 2011 at 23:40

SLaks · Accepted Answer · 2011-09-12 22:58:57Z

2

If it's a global function, you can write window[stringVar]().

answered Sep 12, 2011 at 22:58

SLaks

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GolezTrol · Accepted Answer · 2011-09-12 22:59:03Z

2

A function you declare in the global scope becomes part of the window object, so you should be able to call this:

window['js_inject']();

answered Sep 12, 2011 at 22:59

GolezTrol

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