mirror of
https://github.com/mrclay/minify.git
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81 lines
2.4 KiB
Markdown
81 lines
2.4 KiB
Markdown
# Server Errors
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| **Code** | **Most likely cause** |
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| 400 | Controller failed to return valid set of sources to serve |
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| 500 | Minifier threw exception (e.g. JSMin choked on syntax) |
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You can find details by enabling FirePHP logging:
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1. Install/enable FirePHP for [Firefox](https://addons.mozilla.org/en-US/firefox/addon/6149) or [Chrome](https://chrome.google.com/webstore/detail/firephp4chrome/gpgbmonepdpnacijbbdijfbecmgoojma?hl=en-US).
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1. Open the Chrome DevTools/Firebug console
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1. Set `$min_errorLogger = true;` in config.php
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1. Reload the Minify URL
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Hopefully you'll see the error appear:
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```
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Minify: Something bad happened!
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```
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# Javascript/CSS Problems
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When Javascript errors occur, or URIs in CSS files are incorrectly rewritten, enable "debug mode" to ease debugging combined files:
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1. Set `$min_allowDebugFlag = true;` in config.php
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1. Append `&debug` to the Minify URI. E.g. `/min/?f=script1.js,script2.js&debug` (or use the bookmarklet provided by /min/builder/)
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In "debug mode":
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* comments are inserted into the output showing you line numbers in the original file(s)
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* no minification is performed
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* In CSS, URI rewriting _is_ performed
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* In CSS, a leading comment shows how URIs were rewritten.
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Example: a combination of two Javascript files in debug mode
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```js
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/* firstFile.js */
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/* 1 */ (function () {
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/* 2 */ if (window.foo) {
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...
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/* 11 */ })();
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;
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/* secondFile.js */
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/* 1 */ var Foo = window.Foo || {};
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/* 2 */
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...
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```
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Example: Top of CSS output in debug mode
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```
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docRoot : M:\home\foo\www
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currentDir : M:\home\foo\www\css
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file-relative URI : typography.css
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path prepended : M:\home\foo\www\css\typography.css
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docroot stripped : \css\typography.css
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traversals removed : /css/typography.css
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file-relative URI : ../images/bg.jpg
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path prepended : M:\home\foo\www\css\..\images\bg.jpg
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docroot stripped : \css\..\images\bg.jpg
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traversals removed : /images/bg.jpg
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```
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### Tips for handling Javascript errors
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* Use the latest version (2.1.4 beta as of Dec 2010)
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* Try [debug mode](#javascriptcss-problems) to make the combined file more readable (and error locations findable)
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* Find out if other browsers have the same error
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* For pre-minified files, make the filenames end in `.min.js` or `-min.js`, which will prevent Minify from altering them
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* Test your scripts in [JSLint](http://www.jslint.com/).
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## See Also
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* CommonProblems
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