mod_deflate not compressing js in wordpress site

Question

I'm working on a wordpress site. I enabled mod_deflate with this command in .htaccess:

AddOutputFilterByType DEFLATE text/text text/html text/plain text/xml text/css    
application/x-javascript application/javascript

but if i test with GTMetrix: http://gtmetrix.com/reports/watchesstock.eu/wd4jvMpZ

it gives me this advice:

Enable gzip compression "Compressing the following resources with gzip could reduce their transfer size by 229.8KiB (68% reduction)."

and then a list of .js files

Could anyone help me? Thanks

Answer 1

Looking at the page, in Chrome's Network tab, it looks like it's being served with type text/javascript. Try adding that to your filter.

Answer 2

The answer by Hobo seems like it should work, but it doesn't for me. I suspect it's because of the version strings on the end of the .js URLs.

I ended up adding:

<Files ~ "\.(htm|html|css|js|php)$">
    SetOutputFilter DEFLATE
</Files>

This does work for me.