[TYPO3] Typo3 4.2 + scriptmerger extension - advisory

[Paul Vetch]

All,

In case anyone else runs into this issue:  Typo3 4.2 core adds JSMin 
functionality (for minifying Javascript files) and it is enabled by default. 
If you use the scriptmerger extension (which does the same thing but works 
with CSS and has additional functionality) then you will have a conflict 
since Typo3 4.2 core and the extension both attempt to initialise the same 
JSMin class, which results in a fatal error.

The easy solution is to make sure you set config.minifyJS = 0 in your TS to 
disable the built-in functionality; you can then run scriptmerger without 
any problem.  (I've sent a note of the this to Stefan Galinski, who wrote 
the scriptmerger ext).

I don't think this wil affect many people and there is some documentation 
about this new feature about (and it is noted in NEWS.txt in Typo3 4.2 
distro), but you never know.

BTW I recommend the scriptmerger extension very highly - it merges all CSS 
and JS into two files in addition to minifying - reducing the number of 
server requests is an important optimisation for high traffic websites.

All best

Paul