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Run Project

npm install
npm start
# in another tab
npm run webpack

After you see the webpack compilation succeed (the npm run webpack step), open up build/index.html (no server needed!). Then modify whichever .re file in src and refresh the page to see the changes.

For more elaborate ReasonReact examples, please see https://github.com/reasonml-community/reason-react-example

Run Project with Server

To run with the webpack development server run npm run server and view in the browser at http://localhost:8000. Running in this environment provides hot reloading and support for routing; just edit and save the file and the browser will automatically refresh.

Note that any hot reload on a route will fall back to the root (/), so ReasonReact.Router.dangerouslyGetInitialUrl will likely be needed alongside the ReasonReact.Router.watchUrl logic to handle routing correctly on hot reload refreshes or simply opening the app at a URL that is not the root.

To use a port other than 8000 set the PORT environment variable (PORT=8080 npm run server).

Build for Production

npm run clean
npm run build
npm run webpack:production

This will replace the development artifact build/Index.js for an optimized version as well as copy src/index.html into build/. You can then deploy the contents of the build directory (index.html and Index.js).

If you make use of routing (via ReasonReact.Router or similar logic) ensure that server-side routing handles your routes or that 404's are directed back to index.html (which is how the dev server is set up).

To enable dead code elimination, change bsconfig.json's package-specs module from "commonjs" to "es6". Then re-run the above 2 commands. This will allow Webpack to remove unused code.