Each module should export a set of global symbols. Simply omit the ‘var’ keyword in front of them, and they won’t obfuscated.

Hope this helps,
Julien

I’m building a website framework using js-compressors, and have come accross a problem that I can not find an answer for anywhere else. It seems like you are close to the guru in this area and thus I turn my hope for an answer to you.

The goal of the framework is to allow modules to be loaded on the fly, either in the background after the initial load has been done, or when the user requests an action/functionality that has not yet been used. When compressing I hide all unnecessary names by enclosing the total script in an anonymous function. This however obfuscates the names in the base js and the modules in different environments and thus they cannot use eachother. My question is thus if it is possible with the current compressors to set a starting obfuscation table of name=>obfuscated_name when compressing a new file and thus compress it like it was compressed in that environment? Using this approach compressed modules could be run inside the compressed environment by using eval.

Best regards
Kezzel

You should use JSLint. The YUI Compressor is in no way a replacement for JSLint.

http://www.jslint.com/

Regards

Can’t you just have a function to generate the identifiers for you? Something like (in JavaScript, because I don’t do enough Java to be confortable):

var idengen = function () {
if (typeof (idengen.list) === ‘undefined’) {
idengen.init();
}
var count = 0;
var next = this.gen();
while (count

Then if you find an undefined global variable, then just call idengen.seen(globalvar);.

Now that I think about it, it would be helpful to track all undifined global variables and then return them optionally with a command line param.

Ciao!

Since all local variables are going to be renamed to a 1 (or 2, or 3) letter symbol, it tries to spot undeclared globals that are less then 3 letters in length (which is the case for “viv”) to avoid naming conflicts, and shows a warning. It does not care about undeclared globals that are 4 letters long or more (which is the case for “YAHOO”)

I am planning to make some improvements in that area.

Regards

/*extern YAHOO, viv */
/*jslint undef: false, nomen: true, evil: false, undef: true, browser:
true, white: true */

(function () {
viv.example = function () {
};

viv.example();

YAHOO.example = function () {
};

YAHOO.example();
})();

Then execute yuicompressor like so and notice the WARNING.

$ bin/yuicompressor –charset utf-8 –warn test.js

[WARNING] Found an undeclared symbol: viv
(function (){viv —> .

This is strange. It didn’t complain about YAHOO, but complained about
viv. It’s almost as if someone added YAHOO to an exception list… ^_^

It should either complain about both or neither.

Alternatively, it could honor jslint’s extern declaration, which I’d
like even better.

Ciao!

pack:tag 2.4 has been released. It supports the YUI Compressor and the CSS Compressor. Check the website at:
http://sf.net/projects/packtag

Great compressors, keep up the good work.

Keep watching this blog. You will get your answer in an upcoming article to be published within the next 2 weeks.