Post Processing final extract

[nhavar]

I'm trying unsuccessfully so far to find an example of how to do post processing on the final output of ExtractTextPlugin. After I run webpack ExtractTextPlugin successfully merges all of the CSS into a main.css, but there's still cleanup required (like merging/removing dupes). But I haven't seen any examples of how to achieve this. Piping to !postcss just seems to run those plugins on the individual chunks and not the whole. Has anyone identified a solution for manipulating the output file?

[Grafikart]

Got the same problem with mqpacker (to merge media queries)
At the moment the only solution is to use postcss outside of webpack after the build succeed

[kisenka]

@nhavar @Grafikart you can extend extract-text-webpack-plugin and write you own. Take look at ExtractSVGPlugin which postprocess extracted chunk with wrapping it with <svg> tags. Hope that helps.

[kisenka]

Related issue #161

[bebraw]

I do this at purifycss-webpack. Please see the plugin for the approach.