This project shows how you could use webpack's css-modules in Elm's development. This is an alternative approach as compared to elm-css, which is a more functional and pure approach towards declaring component styles.
This is not meant to be set-in-stone truth, but rather a proof-of-concept. Try it and adapt it to your needs!
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CSS Modules: Dynamically generated locally scoped namespaces for classes. 100% compatibility with doing animations / pseudo selectors and media queries, anything you could do with css. Use all the tooling developed on top of CSS like autoprefixer.
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Interop with existing projects: Projects using webpack + css modules could easily port all styles into Elm using this approach.
CSS modules get loaded into Elm via ports and subscriptions. See fetchClasses and receiveClasses and example usage in Login.elm. Webpack receives commands from elm and loads the css modules here. This goes through the Elm Architecture in the application and the css modules will eventually reach the component that needs it.
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Node 6.x.x
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Elm 0.17.0
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elm package install -
npm install
npm start