[opencms-dev] Auto-Condense Javascript and CSS code - new opencms tag cms:minify

Christian Steinert christian_steinert at web.de
Mon Feb 16 12:30:55 CET 2009

Dear Michael,

thanks for your reply - great that you have something like this in mind, 

Concerning the ideas that you have:
> Right now it is planned to use a property and it will only (YUI) minify 
> files with the set property when accessed online, but not offline for 
> better debugging.
> this will also help to clean up OpenCms VFS from those jquery packed and 
>   unpacked versions...
I like the idea of using a property to control this. On the one hand 
this gets rid of the requirement of requiring the CSS/JS stuff to be in 
JSP files, which I agree not everybody will like. (I use JSP anyway to 
include things together, but this is just me).
> -------
> by the way, you can use the <cms:jquery /> tag with any JS file. (a more 
> appropriate name for this tag would be cms:jsinc or even cms:htmlinc 
> since you can also use it to include CSS files)
> just copy your JS file (myfile.js) into
> /system/workplace/resources/jquery/unpacked/
> and the packed (or not, or minified, or smth else to be used online) 
> version into
> /system/workplace/resources/jquery/packed/
> and you can include your js file using this piece of code:
> <cms:jquery js='myfile' />
I see - good to know.
> an idea that just run through my mind is to extend the cms:jquery tag to 
> something like:
> <cms:jquery js='myfile' minify='true' />
> or even
> <cms:jquery js='myfile' minify='--nomunge
> --disable-optimizations' />
> may be this is an even better solution, so the control is on the 
> template and not on the file itself, allowing to use in one template a 
> minified version and in another a 'normal' version (but what for...)
I like the idea of giving control to the template.

What I would really not like though, is if the tag would generate a URL 
that starts with /system/. I know that this would be the easiest way to 
implement something like that, but it means that the /system folder 
needs to be publically available when serving stuff. Since I use static 
export a lot, I really don't like that idea of making a /system/ folder 
available without being able to fix the URL.

Would there be a way to trigger minification by just appending some URL 
parameter to the original css/jsp URL? If the resultant URL that are 
generated by the tag would work similar to how image resizing works, 
then this would be ideal in my opinion and I would prefer this solution 
over using a file system property to control minification.

Another thing that I would like is, if the new functionality would not 
require files to be located at a fixed location. I would prefer to be 
able to reference files in the  same way like it's possible with 
<cms:link />. Using a new tag name (rather than extending cms:jquery) 
seems preferable to me to minimize confusion.

My suggestion would be to have a tag that can be used like this:
  <cms:resource js="/path/to/file.js" options="--nomunge 
--disable-optimizations" force="true" />
and that could generate a URL similar to that:

I don't know how feasible the parameter-based URL processing part of 
this would be. If this does not require changing the opencms core (I am 
afraid it does, though), I would be willing to try and implement 
something like that.

Best Regards

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