Server Errors

You can find details by enabling FirePHP logging:

1. Install/enable FirePHP.
2. Open Firebug's console
3. Set $min_errorLogger = true; in min/config.php
4. Reload the Minify URL

Hopefully you'll see the error appear:

Minify: Something bad happened!

Javascript/CSS Problems

When Javascript errors occur, or URIs in CSS files are incorrectly rewritten, enable "debug mode" to ease debugging combined files:

1. Set $min_allowDebugFlag = 'true' in min/config.php
2. Append &debug to the Minify URI. E.g. /min/?f=script1.js,script2.js&debug (or use the bookmarklet provided by /min/builder/)

In "debug mode":

• comments are inserted into the output showing you line numbers in the original file(s)
• no minification is performed
• In CSS, URI rewriting is performed
• In CSS, a leading comment shows how URIs were rewritten.

Example: a combination of two Javascript files in debug mode

/* firstFile.js */

/* 1  */ (function () {
/* 2  */ 	if (window.foo) {
...
/* 11 */ })();

;
/* secondFile.js */

/* 1   */ var Foo = window.Foo || {};
/* 2   */
...

Example: Top of CSS output in debug mode

docRoot    : M:\home\foo\www
currentDir : M:\home\foo\www\css

file-relative URI  : typography.css
path prepended     : M:\home\foo\www\css\typography.css
docroot stripped   : \css\typography.css
traversals removed : /css/typography.css

file-relative URI  : ../images/bg.jpg
path prepended     : M:\home\foo\www\css\..\images\bg.jpg
docroot stripped   : \css\..\images\bg.jpg
traversals removed : /images/bg.jpg

Tips for handling Javascript errors

• Use the latest version (2.1.4 beta as of Dec 2010)
• Try debug mode to make the combined file more readable (and error locations findable)
• Find out if other browsers have the same error
• For pre-minified files, make the filenames end in .min.js or -min.js, which will prevent Minify from altering them
• Test your scripts in JSLint.

See Also

• CommonProblems