Is there a tool to remove unused methods in javascript?

Question

I\'ve got a collection of javascript files from a 3rd party, and I\'d like to remove all the unused methods to get size down to a more reasonable level.

Does anyone

Answer 1

Unless the library author kept track of dependencies and provided a way to download the minimal code [e.g. MooTools Core download], it will be hard to to identify 'unused' functions.

The problem is that JS is a dynamic language and there are several ways to call a function.

E.g. you may have a method like

function test() 
{
   //
}

You can call it like

   test();

   var i = 10;
   var hello = i > 1 ? 'test' : 'xyz';

   window[hello]();