Make sure that you're installing v3.2.5 as v3.2.4 was missing some postinstall scripts for our OpenCollective message 😅

Deprecations

Preprocessing option in our babel plugin

The preprocess option was never here to stay and its experiment has essentially proven to be insufficient for our future goals. Check out Sweetsour/ISTF for our current effort of making styled-components more performant and adding a CSS pipeline to it: https://github.com/kitten/sweetsour

Thanks to @Samatar26 for his PR!

Changes

Add process.env.SC_ATTR to override our style tag's marker attribute

While we're figuring out how to improve our context-drive StyleSheetManager in a stable way that works with SSR and sharded stylesheets, we would still like to provide a way for you to use styled-components that enables widgets and other use-cases where it might be necessary to prevent us from destroying your stylesheet on pages.

Specifically this affects people who are building non-SSR code that runs on pages where styled-components is already in place. In these cases our SSR rehydration would go along and happily remove another module's style tags. We haven't considered this closely as it is not a good practice in our eyes to run duplicated styled-components modules in a single app. But when you're not dealing with a single app only it might make sense.

You can now change the the style tag's styled-components attribute by bundling with the SC_ATTR environment variable. Given a setup where you can set this variable, we will now inject style tags with a different attribute, so that they're not affected by the standard SSR rehydration.

Documentation will follow soon; Thanks to @Fer0x for this change!