SSR usage and implementation details

[benmccann]

The readme says the plugin is SSR Friendly, but I was wondering if you could give some more details about that.

Is there anything I would need to do to configure a project to use this plugin with SSR?

I would expect that things like document.createElement would fail on the server since the DOM isn't available to provide document:

extract-css-chunks-webpack-plugin/src/index.js

Line 354 in c640252

'var linkTag = document.createElement("link");',

Is there another code path that gets run on the server?

I have tried looking through past issues for more details, but haven't been able to find out more yet.