Shadow-Cljs Tailwind JIT

Build hooks for enabling Tailwind JIT within Shadow Projects.

Installation and configuration

Install the required node dependencies in your project:

npm install --save-dev postcss-cli tailwindcss autoprefixer cssnano

Add the clojure library to your project via your preferred method (either shadow's own deps or in your deps.edn file).

{com.teknql/shadow-cljs-tailwind-jit
 {:mvn/version "0.2.0"}}

Next, add the required build hooks to your shadow-cljs.edn build configuration:

{:builds
 {:ui
  {;; ...
   :dev
   {:build-hooks
    [(teknql.tailwind/start-watch!)]}}
   :release
   {:build-hooks
    [(teknql.tailwind/compile-release!)]}
   :devtools
   {:http-root   "resources/public/" ;; Must be set to infer default purge targets.
    :http-port   3000}
   :tailwind/output "resources/public/css/site.css"}}}

Customization

The following options are supported via namespaced keys within the shadow-cljs build config:

• :tailwind/output - Where the generated CSS will be written to. Default: resources/public/css/site.css
• :tailwind/config - A map that is used for the tailwind.config.js. Automatically encodes kebab cased keys into camel cased.
• :postcss/config - A map that is used for the postcss.config.js. Automatically encodes kebab cased keys into camel cased.

Note that editing either the :tailwind/config or :postcss/config could result in incompatible configurations, so please be careful.

FAQ

How is this different from jacekschae/shadow-cljs-tailwindcss?

The above project is a great example of how to get tailwindcss and postcss set up to use along side a shadow-cljs project. When running it's npm run dev it will start shadow-cljs as well as a postcss watch process to continuously recompile your stylesheets. Since it uses tailwind and postcss directly, it is reliant on your project having some boilerplate (tailwind.config.js, postcss.config.js and src/css/tailwind.css) that those tools expect to be in place.

This project differs in two major ways:

1. It instead uses shadow-cljs' build-hooks machinery to manage the postcss process. The end result is the same, but results in you being able to call npx shadow-cljs server and have the postcss process started for you. If you use tools in your editor to manage your shadow process (eg. cider) then this will require less configuration.

2. Rather than introduce the boilerplate files mentioned above, the build-hooks create a temporary project with the required boilerplate, allowing you to omit the files from your project. Configuration can still be provided using the :tailwind/config and :postcss/config entries in the build configuration of your project in your shadow-cljs.edn