[Mapbender-dev] JavaScript compression

[Marc Jansen]

Hi list,

I would love to see compression brought to the Javascript files and have 
another suggestion as for the compression tool:

http://dojotoolkit.org/docs/shrinksafe (a nice article which shows how 
to use the compression tool)

The Java-file custom_rhino.jar is used to pack Javascript. This is used 
within the dojotoolkit (www.dojotoolkit.org) for example. One can 
download the file here: 
http://svn.dojotoolkit.org/dojo/trunk/buildscripts/lib/custom_rhino.jar

-- Marc



Christoph Baudson (WhereGroup) schrieb:
> To enable Mapbender to load faster, the new release will employ 
> JavaScript compression.
>
> There has been a lot of discussion about this in the past; I think 
> packing the JS files with JSMin is the best idea:
>
> http://www.crockford.com/javascript/jsmin.html
>
> + the existing JS code must not stick to a given syntax
> + transparent (removes only linefeeds, whitespaces and comments)
> + no obfuscation
> 0 compared to real packers with still a good compression rate.
>
> Files that are already compressed with other packers (like jQuery) 
> will of course not be re-compressed.
>
> Some more questions arise:
>
> 1) Where to store the compressed/uncompressed files in the file 
> system. The default setting should be "compressed" IMHO. It should be 
> easy to switch back and forth from uncompressed to compressed.
>
> 2) Which settings? Take a look at
>
> http://fmarcia.info/jsmin/test.html
>
> You can add comments. The compressed JS files will not have a license 
> on top of the script, as comments are removed. Do we have to add a 
> license?
>
> For compression settings, I chose "conservative" for my test run; Some 
> scripts like jsTree.js don't use the ; to end statements, so a 
> linefeed mustn't be removed.
>
> Any ideas?
>
> Christoph
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