React Native using shadow-cljs in 3 minutes

This is adapted from the PEZ rn-rf-shadow example here by doing the minimum required to remove the Expo dependency.

The fastest way a ClojureScript coder can get started with React Native. Prove me wrong.

This is an example project using: shadow-cljs, React Native, Reagent, and re-frame.

Command line

$ npm install -g react-native-cli
$ yarn
$ shadow-cljs watch app
# wait for first compile to finish or expo gets confused
# start up an Android emulator or connect a device with USB debugging turned on
# in terminal #1
$ yarn start
# in terminal #2 
$ react-native run-android

Production builds

To be updated.

Some notes from Thomas Heller (retained from PEZ example)

(This project is built from this example of his: https://github.com/thheller/reagent-expo)

The :app build will create an app/index.js. In release mode that is the only file needed. In dev mode the app directory will contain many more .js files.

:init-fn is called after all files are loaded and in the case of expo must render something synchronously as it will otherwise complain about a missing root component. The shadow.expo/render-root takes care of registration and setup.

You should disable the expo live reload stuff and let shadow-cljs handle that instead as they will otherwise interfere with each other.

Source maps don't seem to work properly. metro propably doesn't read input source maps when converting sources as things are correctly mapped to the source .js files but not their sources.

Initial load in dev is quite slow since metro processes the generated .js files.

reagent.core loads reagent.dom which will load react-dom which we don't have or need. Including the src/main/reagent/dom.cljs to create an empty shell. Copied from re-natal.